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A kind of analysis method of metamure
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An analytical method and technology of Weibaimu, applied in the field of pesticide analysis, can solve the problems of high content of Weibaimu and troublesome treatment of heavy metal waste liquid, and achieve the effect of low detection limit, saving reagents and high sensitivity.
Active Publication Date: 2017-05-24
利民化学有限责任公司
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Problems solved by technology
However, there are still many deficiencies in the reported methods
For example, many solutions are used for chemical analysis, and the heavy metal waste liquid contained in the reaction product is troublesome to deal with, and the content of metabolite is high due to the small amount of carbon disulfide in the sample
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preparation example Construction
[0034] (1) Preparation of standard solution: Accurately weigh about 100mg of metamac standard sample (accurate to ±0.2mg), put it into a 50mL volumetric flask, add 5mL of ultrapure water, vibrate for 1min under ultrasonic waves, and then settling with ultrapure water. After shaking well, take 1.0mL of the above sample solution into a 25mL volumetric flask, then dilute to the mark with mobile phase, filter (0.45μ nylon membrane), and set aside the filtrate.
[0035] (2) Preparation of the sample solution: Accurately weigh about 100 mg of the sample containing metabam (accurate to ±0.2 mg), put it into a 50 mL volumetric flask, dilute it with ultrapure water, vibrate for 1 min under ultrasonic waves, and then, After shaking well, take 1.0mL of the above sample solution into a 25mL volumetric flask, then dilute to the mark with mobile phase, filter (0.45μ nylon membrane), and the filtrate is set aside.
[0036] (3) Determination: According to the above preparation method, when th...
Embodiment 1
[0044] The AS-23 chromatographic column is used, the eluent is buffer:alcohol=90:10 (v / v), the flow rate is 0.8ml / min, the column temperature is 25°C, the inhibitory current is 20mA, and the injection volume is 20ul. Enter the standard solution under the above conditions, repeat the injection until the difference between the peak areas of two adjacent needles is less than 1%, and then measure according to the order of standard solution, sample solution, sample solution, and standard solution to obtain the power Acre content, its content is 40.08%.
Embodiment 2
[0046] The AS-23 chromatographic column is used, the eluent is buffer:alcohol=90:10 (v / v), the flow rate is 0.8ml / min, the column temperature is 30°C, the inhibitory current is 30mA, and the injection volume is 20ul. Enter the standard solution under the above conditions, repeat the injection until the difference between the peak areas of two adjacent needles is less than 1%, and then measure according to the order of standard solution, sample solution, sample solution, and standard solution to obtain the power Acre content, its content is 40.12%.
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Abstract
An analysis method for metham sodium comprises the following steps that 1, a standard metham sodium solution and a metham sodium sample solution are prepared; 2, an AS-23 chromatographic column is adopted, and ion chromatographic analysis determination is performed on the standard metham sodium solution and the metham sodium sample solution; 3, active compounds of the metham sodium and the main contents of dosage forms thereof are obtained, and a measuring result is obtained. The analysis method for the metham sodium has the advantages of being short in analysis time, low in sample consumption, good in selectivity, high in sensitivity, low in detection limit and capable of easily achieving automation, saving reagents and reducing industrial pollution.
Description
technical field [0001] The invention relates to the field of pesticide analysis, in particular to an analysis method for metamura. Background technique [0002] Microbam, the chemical name is sodium methyl dithiocarbamate. The appearance of the original drug is a white crystalline powder with a pungent smell, and the appearance of the preparation is a light yellow-green stable homogeneous liquid without visible suspended matter. Solubility: (g / L20℃) water: 772, ethanol <5, insoluble in most organic solvents; stable in alkaline, decomposes in acid. The acute oral LD50 of the original drug in male rats is 820mg / kg, the acute percutaneous LD50 of rabbits is 800mg / kg, and the acute percutaneous LD50 of rabbits is 800mg / kg. Metabam is low-toxic, academically classified as a nematicide, and has the functions of sterilization and weeding. It can effectively kill root-knot nematodes, weeds and other harmful organisms, so as to obtain clean and healthy soil. Irritant to eyes a...
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