Analysis method of mancozeb
A mancozeb and analysis method technology, applied in the field of pesticide analysis, can solve the problems of complicated operation steps, troublesome heavy metal waste liquid treatment, etc., and achieve the effect of avoiding acid decomposition
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Embodiment 1
[0035] Preparation of standard solution: Accurately weigh 100 mg (accurate to 0.01 mg) of a standard product with a content of 88.0 wt %, add an appropriate amount of mixed solution B to a 100 ml volumetric flask, dissolve it by ultrasonic, then add the above mixed solution B to volume to the mark, After mixing, take 1ml into a 25ml volumetric flask, dilute to the volume with mixed solution B, and mix well for later use.
[0036] Preparation of sample solution: Accurately weigh about 100mg of the mancozeb sample (accurate to 0.01mg) in a 100ml volumetric flask, add an appropriate amount of mixed solution B, ultrasonically dissolve, then add the above mixed solution B to the volume, mix well and take 1ml In a 25ml volumetric flask, use mixed solution B to dilute to the volume, mix well and set aside.
Embodiment 2
[0038] A C18 chromatographic column was used, the mobile phase was methanol: buffer solution = 7:3 (V / V), the flow rate was 0.9ml / min, the column temperature was 29°C, the detection wavelength was 282nm, and the injection volume was 20μL. Enter the standard solution under the above conditions, repeat the injection until the difference between the peak areas obtained by two adjacent injections is less than 1%, then perform HPLC analysis in the order of standard, sample, sample, and standard, and the results are shown in the appendix. Figure 1-4 , so as to obtain the content of mancozeb, which is 91.07%.
Embodiment 3
[0040] A C18 chromatographic column was used, the mobile phase was methanol: buffer solution = 7:3 (V / V), the flow rate was 0.6ml / min, the column temperature was 27°C, the detection wavelength was 270nm, and the injection volume was 20μL. Enter the standard solution under the above conditions, repeat the injection until the difference between the peak areas obtained by two adjacent injections is less than 1%, and then analyze in the order of standard, sample, sample, and standard to obtain Maneb Zinc content, its content is 90.17%.
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