{"id":1160,"date":"2024-04-11T14:17:57","date_gmt":"2024-04-11T11:17:57","guid":{"rendered":"https:\/\/sisu.ut.ee\/lcms_method_validation\/self-test-5-2b\/"},"modified":"2024-04-11T14:17:57","modified_gmt":"2024-04-11T11:17:57","slug":"self-test-5-2b","status":"publish","type":"page","link":"https:\/\/sisu.ut.ee\/lcms_method_validation\/self-test-5-2b\/","title":{"rendered":"Self test 5.2B"},"content":{"rendered":"
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You are validating a LC\/MS analysis of L-PFOS in ground water and for trueness evaluation, you are analyzing a commercial CRM sample.
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\r\n\"CoA\"\u00a0
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\r\nYou are using matrix matched calibration.
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\r\nYour analysis data is:
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Number of result<\/strong><\/td>

C (ng\/L)<\/strong><\/p><\/td><\/tr>

1<\/p><\/td>

13.96<\/p><\/td><\/tr>

2<\/p><\/td>

14.00<\/p><\/td><\/tr>

3<\/p><\/td>

12.51<\/p><\/td><\/tr><\/tbody><\/table><\/div>

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1. <\/span>Calculate bias and give the answer with 2 decimals (unit: ng\/L):<\/div><\/div>

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2. <\/span>Calculate relative bias and give the answer with 1 decimal (unit: %):<\/div><\/div>

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3. <\/span>For evaluating agreement between the lab result and the reference value, calculate zeta-score and please present it with three significant digits.
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