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    Home > Chemicals Industry > Chemical Technology > Determination of linear range and lower limit of 16 kinds of benzimidazole drug residues in puffer fish, eel and grilled eel

    Determination of linear range and lower limit of 16 kinds of benzimidazole drug residues in puffer fish, eel and grilled eel

    • Last Update: 2021-10-10
    • Source: Internet
    • Author: User
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    8 Linearity range and lower limit of determination

    Prepare a mixed standard working solution, measure it under selected chromatographic and mass spectrometry conditions, and draw a linear regression curve based on the peak area of ​​the measured component of the standard working solution against the concentration of the measured component of the standard solution working solution
    .


    In the range of 0.


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    9 Method recovery and precision

    Using blank puffer fish muscle, eel muscle, and grilled eel samples without benzimidazole drugs, the recovery and precision tests were carried out at four levels of 10ug/kg, 20μg/kg, 50ug/kg, and 100μg/kg.
    The results See Table 17-17
    .


    It can be seen from Table 17-17 that the recovery rate and precision of the method meet the requirements for recovery rate and precision of residue detection


    Table 17-17 Indoor addition test results of 16 kinds of benzimidazole (n=10)

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    10 Repeatability and reproducibility

    Under repeatability test conditions, the absolute difference between the two independent test results obtained does not exceed the repeatability limit (r).
    If the difference exceeds the repeatability limit (r), the test results should be discarded and the two individual tests should be completed again.
    Determination
    .


    Under the reproducibility test conditions, the absolute difference between the two independent test results obtained does not exceed the reproducibility limit (R)


    Table 17-18 Content range and repeatability and reproducibility equation

     

     

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