Method for detecting atrazine pesticide residues in sludge
A technology of pesticide residues and atrazine, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of unstable results and poor repeatability, and achieve the effect of accurate pesticide residues and good reproducibility
Pending Publication Date: 2020-07-10
广东煜祺检测股份有限公司
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Ultrasonic extraction method, the result will be unstable and the repeatability is not good
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[0039] A detection method of atrazine pesticide residues in sludge, comprising the following steps:
[0040] (1) Put 20g of the sludge sample into a mortar, add quantitative 40g of anhydrous sodium sulfate, stir evenly, and grind to obtain the pretreated sludge sample. When the mass ratio is 0.5:1, the sludge sample and anhydrous sodium sulfate can be fully mixed, and the sludge sample can be fully dried.
[0041] Two pretreated sludge samples were prepared according to the above method, the pretreated sludge sample 1 was used to test its water content, and the pretreated sludge sample 2 was used to test the content of atrazine pesticide.
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The invention provides a method for detecting atrazine pesticide residues in sludge. The method comprises the following steps: (1) pretreating a sludge sample to obtain a pretreated sludge sample; (2)extracting the pretreated sludge sample through Soxhlet extraction to obtain an extracting solution; (3) transferring the extracting solution into a rotary evaporator for rotary concentration to obtain a concentrated extracting solution; (4) purifying and eluting the concentrated extracting solution through a small magnesium silicate purification column to obtain an eluent; (5) concentrating theeluent by using a nitrogen blowing concentrator, blowing nitrogen, and finally fixing the volume by using acetone to obtain a sample solution; (6) preparing a standard solution; and (7) setting sampleintroduction conditions and gas chromatography-mass spectrometer parameter conditions, analyzing the sample solution and the standard solution, and obtaining the concentration of the atrazine pesticide in the sample solution after the analysis is finished. According to the method, the recovery rate and the detection limit are evaluated by adopting the standard solution, the detection limit is low, the reproducibility is good, and the atrazine pesticide residues in the sludge can be accurately determined.
Description
technical field [0001] The invention relates to a detection method of atrazine pesticide residue in sludge. Background technique [0002] Atrazine (ATR), also known as atrazine, is a herbicide that removes weeds by inhibiting photosynthesis, and is widely used in corn, sorghum, sugarcane, fruit trees, woodland, etc. However, atrazine (ATR) is a typical environmental hormone pollutant. Its metabolism is slow in the natural environment. It can inhibit the photosynthesis of various algae in the water body, disturb the physiological functions of fish, and kill underwater arthropods. In severe cases, it can cause chromosome damage in mice. Under long-term exposure at low concentrations, ATR can disturb the endocrine system and reproductive system of the human body. [0003] International regulations have been made on the amount of atrazine residues in water bodies, but the detection of atrazine residues in sludge is ignored, and the residues of atrazine in underwater sludge wil...
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Login to view more IPC IPC(8): G01N30/06G01N30/02
CPCG01N30/06G01N30/12G01N30/14G01N30/02G01N2030/062G01N2030/126G01N2030/146
Inventor 成院飞莫炯怀彭程蔡高杰黎景熙
Owner 广东煜祺检测股份有限公司
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