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Procedures for determination of 5 kinds of benzimidazole drug residues in milk and milk powder

 Last Update: 2021-10-11
 Source: Internet
 Author: User

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17.

(1) Liquid chromatography conditions

Chromatographic column: BEHC ₁₈ , 1.

Table 17-3 Liquid chromatography gradient elution conditions

(2) Mass spectrometry conditions

Ion source: electrospray ion source; scanning method: positive ion scanning; detection method: multi-reaction monitoring; ionization voltage: 2.

Table 17-4 Mass spectrometry parameters of five benzimidazole drugs

(3) Qualitative determination

Choose one parent ion for each test component and two or more product ions.

(4) Quantitative determination

Samples were injected separately with the matrix mixed standard working solution, using the concentration of the standard solution as the abscissa and the peak area as the ordinate to draw a standard working curve.

Figure 17-2 Multiple reaction monitoring (MRM) chromatograms of five benzimidazole drug standards

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