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Selection of analysis conditions for determination of testosterone, epitestosterone and progesterone residues in beef liver and beef
Time of Update: 2021-09-20
The acetonitrile -ammonium formate gradient elution method realizes the effective separation of testosterone and epitestosterone, and also minimizes the interference of the sample matrix to the determination .
5μg/kg, and the lower limit (LOQ) of testosterone, epitestosterone and progesterone in animal tissues (liver) is 0.
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Determination of testosterone, epitestosterone and progesterone residues in beef liver and beef
Time of Update: 2021-09-20
Table 8-8 Mass spectrometry parameters of testosterone, epitestosterone, progesterone and internal standards(3) Qualitative determinationChoose one parent ion and two or more product ions for each tested component.
The multiple reaction monitoring (MRM) chromatograms of testosterone , epitestosterone and progesterone reference materials are shown in Figure 8-8 .
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Determination of testosterone, epitestosterone and progesterone residues in beef liver and beef by liquid chromatography-tandem mass spectrometry
Time of Update: 2021-09-20
Accurately weigh the appropriate amount of testosterone, epitestosterone, and progesterone standard materials, prepare 100μg/mL standard stock solutions with methanol, store them at -18°C, and use them for 6 months .
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Recovery rate and precision of determination method for testosterone, epitestosterone and progesterone residues in beef liver and beef
Time of Update: 2021-09-12
Table 8-10 Laboratory test results of standard addition recovery rate of blank animal muscle (n=10)It can be seen from Table 8-10 that testosterone in animal muscles is added at a level of 0.