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A method for detecting thiossen copper in water by using uplc-ms/ms method

A technology for thiossen copper and water detection, applied in the field of thiossen copper detection in water, can solve the problems of poor repeatability, high detection limit, low sensitivity, etc., and achieve the effects of simple operation, accurate results and high sensitivity

Active Publication Date: 2021-05-07
贵州健安德科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the invention is to overcome defects such as high detection limit, low sensitivity and poor repeatability in the prior art, and provide a method for detecting thiesen copper in water using UPLC-MS / MS

Method used

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  • A method for detecting thiossen copper in water by using uplc-ms/ms method
  • A method for detecting thiossen copper in water by using uplc-ms/ms method
  • A method for detecting thiossen copper in water by using uplc-ms/ms method

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Experimental program
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Effect test

Embodiment 1

[0050] Preparation of EDTA mixed solution: weigh 0.5g EDTA-Na 2 Put 1g of L-cysteine ​​salt in a 1000mL beaker, add 900mL of water, adjust the pH to 10 with 1mol / L NaOH, transfer to a 1000mL volumetric flask and set the volume to the mark to obtain the EDTA mixture;

[0051] Preparation of the test solution: Weigh 0.3232g of a 30% Chunlei · Thysen copper suspension concentrate sample in a 100mL volumetric flask, add aeration water to dilute to the mark, ultrasonicate for 2min, take 2.0mL in a 2000mL beaker, and use an aeration Dilute with water to 2000mL scale to obtain a concentration of 808μg / L thysen copper aqueous solution, which is the thysen copper aqueous solution to be tested. Dilute with the EDTA mixture prepared above at a volume ratio of 1:1, vortex and mix for 5 minutes, and wait for sufficient reaction , and then ultrasonicated for 5 minutes, and then filtered with a 0.45um filter membrane to obtain the derivatized thiasen copper solution, which is to be detected ...

Embodiment 2

[0070] Preparation of EDTA mixed solution: weigh 1g EDTA-Na 2 Put 2g of L-cysteine ​​salt in a 1000mL beaker, add 900mL of water, adjust the pH to 11 with 2mol / L NaOH, transfer to a 1000mL volumetric flask and set the volume to the mark to obtain the EDTA mixture;

[0071] Preparation of the test solution: Weigh 0.3232g of a 30% Chunlei · Thysen copper suspension in a 100mL volumetric flask, add aeration water to dilute to the mark, ultrasonicate for 3min, take 2.0mL in a 2000mL beaker, and use an aeration Dilute with water to 2000mL scale to get a concentration of 808μg / L thysen copper aqueous solution, which is the thysen copper aqueous solution to be tested. Dilute with the EDTA mixture prepared above at a volume ratio of 1:1.5, vortex and mix for 6 minutes, and wait for sufficient reaction , and then sonicated for 6 minutes, and then filtered with a 0.45um filter membrane to obtain the derivatized thiesin copper solution, which is to be detected by UPLC-MS / MS;

[0072] Pr...

Embodiment 3

[0090] Preparation of EDTA mixed solution: weigh 2g EDTA-Na 2 Put 3g of L-cysteine ​​salt in a 1000mL beaker, add 900mL of water, adjust the pH to 13 with 2.5mol / L NaOH, transfer to a 1000mL volumetric flask and set the volume to the mark to obtain the EDTA mixture;

[0091] Preparation of the test solution: Weigh 0.3232g of a 30% Chunlei · Thysen copper suspension in a 100mL volumetric flask, add aeration water to dilute to the mark, ultrasonicate for 4min, take 2.0mL in a 2000mL beaker, and use an aeration Dilute with water to 2000mL scale to obtain a concentration of 808μg / L thiesen copper aqueous solution, which is the thiassen copper aqueous solution to be tested. Dilute it with the EDTA mixture prepared above at a volume ratio of 1:2, vortex and mix for 8 minutes, and wait for sufficient reaction , and then sonicated for 8 minutes, and then filtered with a 0.45um filter membrane to obtain the derivatized thiesin copper solution, which is to be detected by UPLC-MS / MS;

...

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Abstract

The invention relates to a method for detecting thiessen copper in water by using a UPLC-MS / MS method, and belongs to the technical field of pesticide environmental detection. This method uses EDTA-Na 2 The sample was derivatized with L-cysteine ​​hydrochloride, and detected by UPLC-MS / MS, using Agilent Hilic Plus RRHD (2.1×50mm, 1.8μm) hydrophilic column and MSD detector, external standard method for quantification. The precision RSD% of this method is 1.14%, the linear equation Y=48.1324X+0431, and the correlation coefficient R 2 The average recovery rate is 0.9997, the average recovery rate is 86.89%, the LOD is 0.427μg / L, and the LOQ is 1.422μg / L. It has the advantages of simple operation, fast analysis, accurate results, good separation effect and high sensitivity.

Description

technical field [0001] The invention relates to the technical field of environmental detection, in particular to a method for detecting thiesen copper in water by using the UPLC-MS / MS method. Background technique [0002] Thysencopper is a thiazole organic copper fungicide, which mainly controls rice bacterial blight, bacterial streak, cabbage soft rot and tomato bacterial wilt. High-efficiency broad-spectrum, low toxicity, safety and environmental protection, no pollution, special effects on bacterial diseases, high efficiency on fungal diseases, stable under acidic conditions, and can be mixed with other pesticides. It is one of the key recommended pesticides by the National Agricultural Technology Center of the Ministry of Agriculture. . [0003] The detection and analysis method of thiesen copper is currently reported only by high performance liquid chromatography. The method not only needs derivation, but also needs repeated extractions. The operation is complicated, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/88G01N30/06
CPCG01N30/06G01N30/88
Inventor 黄玉贵林绍霞何钰陈迎丽何伟王睿
Owner 贵州健安德科技有限公司
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