A kind of detection method of erythromycin residue in soil
A detection method and technology for erythromycin are applied in the field of detection of erythromycin residue titer in soil, which can solve the problems of low detection limit, low recovery rate, inability to detect erythromycin residue quickly and accurately, and improve the Accuracy, Impact Reduction
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specific Embodiment approach 1
[0026] Specific embodiment one: the detection method of erythromycin residue in a kind of soil of the present embodiment, it is carried out according to the following steps:
[0027] 1. Sample preparation for the test product:
[0028] 1) Weigh the soil containing erythromycin, add extractant acetonitrile-Tris-CaCl 2 solution, vortexed for 45-60s, then assisted extraction in ultrasound for 20-30min, then centrifuged at 3500-4000rpm for 5-10min, took the supernatant, and collected the precipitate;
[0029] 2) Add extractant acetonitrile-Tris-CaCl to the precipitate collected in step 1) 2 solution, vortexed for 45-60s, then assisted extraction in ultrasound for 20-30min, then centrifuged at 3500-4000rpm for 5-10min, and took the supernatant;
[0030] 3) Combine the supernatants of step 1) and step 2), put them in a water bath at 35-40° C. and rotate to evaporate to one-fifth of the volume of the supernatant to obtain an inorganic phase;
[0031] 4) Add Tris-CaCl with a pH of ...
specific Embodiment approach 2
[0041] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the soil containing erythromycin and the extractant acetonitrile-Tris-CaCl 2 The mass volume ratio of the solution is 1g:15mL. Others are the same as in the first embodiment.
specific Embodiment approach 3
[0042] Specific embodiment three: the difference between this embodiment and specific embodiment one is: precipitation and extraction agent acetonitrile-Tris-CaCl in step 2) 2 The mass volume ratio of the solution is 1g:15mL. Others are the same as in the first embodiment.
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