{"id":700,"date":"2024-04-11T01:46:05","date_gmt":"2024-04-10T22:46:05","guid":{"rendered":"https:\/\/sisu.ut.ee\/heritage-analysis\/self-test-5-2\/"},"modified":"2024-07-17T22:43:47","modified_gmt":"2024-07-17T19:43:47","slug":"self-test-5-2","status":"publish","type":"page","link":"https:\/\/sisu.ut.ee\/heritage-analysis\/self-test-5-2\/","title":{"rendered":"SELF TEST 5.2"},"content":{"rendered":"<div id=\"watupro_quiz\" class=\"quiz-area single-page-quiz\">\n<p id=\"submittingExam14\" style=\"display:none;text-align:center;\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/sisu.ut.ee\/wp-content\/plugins\/watupro\/img\/loading.gif\" width=\"16\" height=\"16\"><\/p>\n\n<div class=\"watupro-exam-description\" id=\"description-quiz-14\"><h2><span style=\"color: #000000;\">Questions about general theoretical aspects of <\/span><span style=\"color: #b22222;\"><strong>mass spectrometry<\/strong><\/span><span style=\"color: #000000;\">.<\/span><\/h2>\n<p>\u00a0<\/p>\n<\/div>\n\n<form action=\"\" method=\"post\" class=\"quiz-form\" id=\"quiz-14\" enctype=\"multipart\/form-data\">\n<div class=\"watu-question \" id=\"question-1\" style=\";\"><div id=\"questionWrap-1\" class=\"  watupro-required-99 watupro-question-id-99\">\n\t\t\t<div class=\"question-content\"><div><p>Which of the following are soft ionisation techniques? <span style=\"font-size:12px;\">(There can be one or more correct answers)<\/span><\/p><\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_1\" value=\"99\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType99\" class=\"answerTypeCnt1\" value=\"checkbox\"><input type=\"hidden\" id=\"watupro-required-question-99\"><!-- end question-content--><\/div><div class=\"question-choices watupro-choices-columns \" id=\"questionChoices99\"><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-99[]\" id=\"answer-id-442\" class=\"answer   answerof-99 \" value=\"442\"><label for=\"answer-id-442\" id=\"answer-label-442\" class=\" answer\"><span><p>Chemical ionisation (CI)<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-99[]\" id=\"answer-id-443\" class=\"answer   answerof-99 \" value=\"443\"><label for=\"answer-id-443\" id=\"answer-label-443\" class=\" answer\"><span><p>Matrix-assisted laser desorption\/ionisation (MALDI)<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-99[]\" id=\"answer-id-444\" class=\"answer   answerof-99 \" value=\"444\"><label for=\"answer-id-444\" id=\"answer-label-444\" class=\" answer\"><span><p>Electrospray ionisation (ESI)<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-99[]\" id=\"answer-id-445\" class=\"answer   answerof-99 \" value=\"445\"><label for=\"answer-id-445\" id=\"answer-label-445\" class=\" answer\"><span><p>Atmospheric pressure chemical ionisation (APCI)<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-99[]\" id=\"answer-id-446\" class=\"answer   answerof-99 \" value=\"446\"><label for=\"answer-id-446\" id=\"answer-label-446\" class=\" answer\"><span><p>Electron ionisation (EI)<\/p><\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class=\"watu-question \" id=\"question-2\" style=\";\"><div id=\"questionWrap-2\" class=\"  watupro-required-100 watupro-question-id-100\">\n\t\t\t<div class=\"question-content\"><div><p>Which of the following are low-resolution (LR) mass analysers? <span style=\"font-size:12px;\">(There can be one or more correct answers)<\/span><\/p><\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_2\" value=\"100\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType100\" class=\"answerTypeCnt2\" value=\"checkbox\"><input type=\"hidden\" id=\"watupro-required-question-100\"><!-- end question-content--><\/div><div class=\"question-choices watupro-choices-columns \" id=\"questionChoices100\"><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-100[]\" id=\"answer-id-447\" class=\"answer   answerof-100 \" value=\"447\"><label for=\"answer-id-447\" id=\"answer-label-447\" class=\" answer\"><span><p>Linear Time of Flight (ToF)<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-100[]\" id=\"answer-id-448\" class=\"answer   answerof-100 \" value=\"448\"><label for=\"answer-id-448\" id=\"answer-label-448\" class=\" answer\"><span><p>Quadrupole (Q)<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-100[]\" id=\"answer-id-449\" class=\"answer   answerof-100 \" value=\"449\"><label for=\"answer-id-449\" id=\"answer-label-449\" class=\" answer\"><span><p>Ion trap (IT)<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-100[]\" id=\"answer-id-450\" class=\"answer   answerof-100 \" value=\"450\"><label for=\"answer-id-450\" id=\"answer-label-450\" class=\" answer\"><span><p>Reflectron Time of Flight (ToF)<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-100[]\" id=\"answer-id-451\" class=\"answer   answerof-100 \" value=\"451\"><label for=\"answer-id-451\" id=\"answer-label-451\" class=\" answer\"><span><p>Fourier Transform Ion Cyclotron Resonance (FT-ICR)<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-100[]\" id=\"answer-id-452\" class=\"answer   answerof-100 \" value=\"452\"><label for=\"answer-id-452\" id=\"answer-label-452\" class=\" answer\"><span><p>Fourier Transform Orbitrap (FT-OT)<\/p><\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class=\"watu-question \" id=\"question-3\" style=\";\"><div id=\"questionWrap-3\" class=\"  watupro-required-101 watupro-question-id-101\">\n\t\t\t<div class=\"question-content\"><div><p>Which of the following applies for MS? <span style=\"font-size:12px;\">(There can be one or more correct answers)<\/span><\/p><\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_3\" value=\"101\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType101\" class=\"answerTypeCnt3\" value=\"checkbox\"><input type=\"hidden\" id=\"watupro-required-question-101\"><!-- end question-content--><\/div><div class=\"question-choices watupro-choices-columns \" id=\"questionChoices101\"><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-101[]\" id=\"answer-id-453\" class=\"answer   answerof-101 \" value=\"453\"><label for=\"answer-id-453\" id=\"answer-label-453\" class=\" answer\"><span><p>It is a very sensitive technique<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-101[]\" id=\"answer-id-454\" class=\"answer   answerof-101 \" value=\"454\"><label for=\"answer-id-454\" id=\"answer-label-454\" class=\" answer\"><span><p>It is suitable for qualitative and quantitative analysis<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-101[]\" id=\"answer-id-455\" class=\"answer   answerof-101 \" value=\"455\"><label for=\"answer-id-455\" id=\"answer-label-455\" class=\" answer\"><span><p>It allows to identify different compounds in a mixture<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-101[]\" id=\"answer-id-456\" class=\"answer   answerof-101 \" value=\"456\"><label for=\"answer-id-456\" id=\"answer-label-456\" class=\" answer\"><span><p>Different ion sources can be used<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-101[]\" id=\"answer-id-457\" class=\"answer   answerof-101 \" value=\"457\"><label for=\"answer-id-457\" id=\"answer-label-457\" class=\" answer\"><span><p>Can be combined with chromatography<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-101[]\" id=\"answer-id-458\" class=\"answer   answerof-101 \" value=\"458\"><label for=\"answer-id-458\" id=\"answer-label-458\" class=\" answer\"><span><p>Several (same or different) mass analysers can be combined (tandem MS)<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-101[]\" id=\"answer-id-459\" class=\"answer   answerof-101 \" value=\"459\"><label for=\"answer-id-459\" id=\"answer-label-459\" class=\" answer\"><span><p>It separates compounds according to polarity<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-101[]\" id=\"answer-id-460\" class=\"answer   answerof-101 \" value=\"460\"><label for=\"answer-id-460\" id=\"answer-label-460\" class=\" answer\"><span><p>It detects characteristic molecular vibrations, from which structural information about materials can be obtained<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-101[]\" id=\"answer-id-461\" class=\"answer   answerof-101 \" value=\"461\"><label for=\"answer-id-461\" id=\"answer-label-461\" class=\" answer\"><span><p>It is suitable for samples of simple composition only<\/p><\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class=\"watu-question \" id=\"question-4\" style=\";\"><div id=\"questionWrap-4\" class=\"  watupro-required-102 watupro-question-id-102\">\n\t\t\t<div class=\"question-content\"><p>Find the suitable word to complete the following text.<\/p>\n<p>Mass spectrometry is an analytical technique that\u00a0<select name=\"gap_102_1\" class=\"watupro-gap answer answerof-102\"><option value=\"\"><\/option><option value=\"fragments\">fragments<\/option><option value=\"separates\">separates<\/option><option value=\"forms\">forms<\/option><option value=\"derivatises\">derivatises<\/option><\/select> the\u00a0<select name=\"gap_102_2\" class=\"watupro-gap answer answerof-102\"><option value=\"\"><\/option><option value=\"molecules\">molecules<\/option><option value=\"material phases\">material phases<\/option><option value=\"ions\">ions<\/option><\/select> created from the\u00a0of the\u00a0<select name=\"gap_102_3\" class=\"watupro-gap answer answerof-102\"><option value=\"\"><\/option><option value=\"internal standards\">internal standards<\/option><option value=\"ions\">ions<\/option><option value=\"compounds\">compounds<\/option><\/select> sample according to their\u00a0<select name=\"gap_102_4\" class=\"watupro-gap answer answerof-102\"><option value=\"\"><\/option><option value=\"polarity\">polarity<\/option><option value=\"fragmentation rate\">fragmentation rate<\/option><option value=\"m\/z values\">m\/z values<\/option><\/select>.\u00a0<\/p>\n<p>\u00a0<\/p>\n<input type=\"hidden\" name=\"question_id[]\" id=\"qID_4\" value=\"102\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType102\" class=\"answerTypeCnt4\" value=\"gaps\"><input type=\"hidden\" id=\"watupro-required-question-102\"><!-- end question-content--><\/div><!-- end questionWrap--><\/div><\/div><div class=\"watu-question \" id=\"question-5\" style=\";\"><div id=\"questionWrap-5\" class=\"  watupro-required-103 watupro-question-id-103\">\n\t\t\t<div class=\"question-content\"><p>Match the ion source with the correct description:<\/p><div class=\"question-choices\"><table class=\"question-choices watupro-matrix-droppable\" id=\"watuPROMatrixDroppable_103\"><tr><td class=\"watupro-matrix-left-cell\">Sample molecules are ionised by bombarding them with high-energy electrons. During this process the analyte ions fragment extensively. The ionisation takes place in vacuum.<\/td>\n\t\t\t\t\t\t<td class=\"watupro-matrix-right-cell watuPRODroppable103\" id=\"watuPRODroppableCell463\"><div class=\"question-choices\"><div class=\"watupro-matrix-right\"><div id=\"watuproNMatrixSelection-0-0\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-0\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell463', 0);return false;\">EI<!--WTPMD555de946fc316c2255cfc7cd096acebc0--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-0-1\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-1\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell463', 1);return false;\">APCI<!--WTPMD5877beaf09c46859d0e3e704da99a12c5--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-0-2\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-2\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell463', 2);return false;\">MALDI<!--WTPMD5e6172fe78f726bcdc6f5794655e7b813--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-0-3\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-3\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell463', 3);return false;\">CI<!--WTPMD53ba0f40775d6d6ace27ef929f5be3cdf--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-0-4\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-4\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell463', 4);return false;\">ESI<!--WTPMD5dd445edb9c3b702b74855e30f795ad4e--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><\/div><\/div><input type=\"hidden\" class=\"answerof-103 watupro-nmatrix-answer-field\" id=\"field-watuPRODroppableCell463\" name=\"matrix-left-463\" value=\"\"><\/td><\/tr><tr><td class=\"watupro-matrix-left-cell\">Sample molecules are ionised by a reagent gas. During this process mostly protonated ions ([M+H]+) are formed. The ionisation takes place in vacuum.<\/td>\n\t\t\t\t\t\t<td class=\"watupro-matrix-right-cell watuPRODroppable103\" id=\"watuPRODroppableCell464\"><div class=\"question-choices\"><div class=\"watupro-matrix-right\"><div id=\"watuproNMatrixSelection-1-0\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-0\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell464', 0);return false;\">EI<!--WTPMD555de946fc316c2255cfc7cd096acebc0--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-1-1\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-1\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell464', 1);return false;\">APCI<!--WTPMD5877beaf09c46859d0e3e704da99a12c5--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-1-2\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-2\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell464', 2);return false;\">MALDI<!--WTPMD5e6172fe78f726bcdc6f5794655e7b813--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-1-3\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-3\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell464', 3);return false;\">CI<!--WTPMD53ba0f40775d6d6ace27ef929f5be3cdf--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-1-4\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-4\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell464', 4);return false;\">ESI<!--WTPMD5dd445edb9c3b702b74855e30f795ad4e--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><\/div><\/div><input type=\"hidden\" class=\"answerof-103 watupro-nmatrix-answer-field\" id=\"field-watuPRODroppableCell464\" name=\"matrix-left-464\" value=\"\"><\/td><\/tr><tr><td class=\"watupro-matrix-left-cell\">Sample solution is sprayed into the source and the solvent droplets are charged. The solvent of the droplets gradually evaporates and gas-phase ions are released. The ionisation takes place under atmospheric pressure.<\/td>\n\t\t\t\t\t\t<td class=\"watupro-matrix-right-cell watuPRODroppable103\" id=\"watuPRODroppableCell465\"><div class=\"question-choices\"><div class=\"watupro-matrix-right\"><div id=\"watuproNMatrixSelection-2-0\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-0\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell465', 0);return false;\">EI<!--WTPMD555de946fc316c2255cfc7cd096acebc0--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-2-1\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-1\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell465', 1);return false;\">APCI<!--WTPMD5877beaf09c46859d0e3e704da99a12c5--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-2-2\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-2\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell465', 2);return false;\">MALDI<!--WTPMD5e6172fe78f726bcdc6f5794655e7b813--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-2-3\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-3\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell465', 3);return false;\">CI<!--WTPMD53ba0f40775d6d6ace27ef929f5be3cdf--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-2-4\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-4\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell465', 4);return false;\">ESI<!--WTPMD5dd445edb9c3b702b74855e30f795ad4e--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><\/div><\/div><input type=\"hidden\" class=\"answerof-103 watupro-nmatrix-answer-field\" id=\"field-watuPRODroppableCell465\" name=\"matrix-left-465\" value=\"\"><\/td><\/tr><tr><td class=\"watupro-matrix-left-cell\">Sample solution is sprayed into the source and the solvent is evaporated. The gas phase molecules are ionised with the help of corona discharge needle. The ionisation takes place under atmospheric pressure.<\/td>\n\t\t\t\t\t\t<td class=\"watupro-matrix-right-cell watuPRODroppable103\" id=\"watuPRODroppableCell466\"><div class=\"question-choices\"><div class=\"watupro-matrix-right\"><div id=\"watuproNMatrixSelection-3-0\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-0\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell466', 0);return false;\">EI<!--WTPMD555de946fc316c2255cfc7cd096acebc0--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-3-1\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-1\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell466', 1);return false;\">APCI<!--WTPMD5877beaf09c46859d0e3e704da99a12c5--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-3-2\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-2\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell466', 2);return false;\">MALDI<!--WTPMD5e6172fe78f726bcdc6f5794655e7b813--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-3-3\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-3\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell466', 3);return false;\">CI<!--WTPMD53ba0f40775d6d6ace27ef929f5be3cdf--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-3-4\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-4\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell466', 4);return false;\">ESI<!--WTPMD5dd445edb9c3b702b74855e30f795ad4e--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><\/div><\/div><input type=\"hidden\" class=\"answerof-103 watupro-nmatrix-answer-field\" id=\"field-watuPRODroppableCell466\" name=\"matrix-left-466\" value=\"\"><\/td><\/tr><tr><td class=\"watupro-matrix-left-cell\">Sample is mixed with matrix material solution, spotted on a target plate, and dried. The dried spot is irradiated with laser that evaporates and ionises the matrix material and sample components: the matrix material molecules are ionised by the laser and their charge is transferred to the sample molecules.<\/td>\n\t\t\t\t\t\t<td class=\"watupro-matrix-right-cell watuPRODroppable103\" id=\"watuPRODroppableCell467\"><div class=\"question-choices\"><div class=\"watupro-matrix-right\"><div id=\"watuproNMatrixSelection-4-0\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-0\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell467', 0);return false;\">EI<!--WTPMD555de946fc316c2255cfc7cd096acebc0--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-4-1\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-1\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell467', 1);return false;\">APCI<!--WTPMD5877beaf09c46859d0e3e704da99a12c5--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-4-2\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-2\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell467', 2);return false;\">MALDI<!--WTPMD5e6172fe78f726bcdc6f5794655e7b813--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-4-3\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-3\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell467', 3);return false;\">CI<!--WTPMD53ba0f40775d6d6ace27ef929f5be3cdf--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-4-4\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-4\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell467', 4);return false;\">ESI<!--WTPMD5dd445edb9c3b702b74855e30f795ad4e--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><\/div><\/div><input type=\"hidden\" class=\"answerof-103 watupro-nmatrix-answer-field\" id=\"field-watuPRODroppableCell467\" name=\"matrix-left-467\" value=\"\"><\/td><\/tr><\/table><\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_5\" value=\"103\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType103\" class=\"answerTypeCnt5\" value=\"nmatrix\"><input type=\"hidden\" id=\"watupro-required-question-103\"><!-- end question-content--><\/div><!-- end questionWrap--><\/div><\/div><div class=\"watu-question \" id=\"question-6\" style=\";\"><div id=\"questionWrap-6\" class=\"  watupro-required-104 watupro-question-id-104\">\n\t\t\t<div class=\"question-content\"><p>Complete the sentence.\u00a0<\/p>\n<p><select name=\"gap_104_1\" class=\"watupro-gap answer answerof-104\"><option value=\"\"><\/option><option value=\"Pump\">Pump<\/option><option value=\"Detector\">Detector<\/option><option value=\"Ion source\">Ion source<\/option><option value=\"Mass analyser\">Mass analyser<\/option><option value=\"Monochromator\">Monochromator<\/option><option value=\"Injector\">Injector<\/option><\/select>\u00a0is responsible for ionising the sample molecules.<\/p>\n<p><select name=\"gap_104_2\" class=\"watupro-gap answer answerof-104\"><option value=\"\"><\/option><option value=\"Detector\">Detector<\/option><option value=\"Injector\">Injector<\/option><option value=\"Pump\">Pump<\/option><option value=\"Monochromator\">Monochromator<\/option><option value=\"Ion source\">Ion source<\/option><option value=\"Mass analyser\">Mass analyser<\/option><\/select>\u00a0separates the ions according to their m\/z value.<\/p>\n<p><select name=\"gap_104_3\" class=\"watupro-gap answer answerof-104\"><option value=\"\"><\/option><option value=\"Pump\">Pump<\/option><option value=\"Monochromator\">Monochromator<\/option><option value=\"Injector\">Injector<\/option><option value=\"Ion source\">Ion source<\/option><option value=\"Mass analyser\">Mass analyser<\/option><option value=\"Detector\">Detector<\/option><\/select>\u00a0registers the created ions.<\/p>\n<p>\u00a0<\/p>\n<input type=\"hidden\" name=\"question_id[]\" id=\"qID_6\" value=\"104\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType104\" class=\"answerTypeCnt6\" value=\"gaps\"><input type=\"hidden\" id=\"watupro-required-question-104\"><!-- end question-content--><\/div><!-- end questionWrap--><\/div><\/div><div style=\"display:none\" id=\"question-7\">\n\t<div class=\"question-content\">\n\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/sisu.ut.ee\/wp-content\/plugins\/watupro\/img\/loading.gif\" width=\"16\" height=\"16\" alt=\"Loading...\" title=\"Loading...\">\u00a0Loading...\t<\/div>\n<\/div>\n\n<br>\n\t\n\t\t\t<div class=\"watupro_buttons flex \" id=\"watuPROButtons14\">\n\t\t  <div id=\"prev-question\" style=\"display:none;\"><input type=\"button\" value=\"&lt; 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