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A kind of assay method of organotin compound

A method of determination and compound technology, which is applied in the field of analytical chemistry, can solve the problems of expensive instruments and complicated operations, and achieve the effects of fast analysis speed, good stability and high selectivity

Active Publication Date: 2022-05-10
ANALYSIS & TESTING CENT CHINESE ACADEMY OF TROPICAL AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a general-purpose detector, LC-MS / MS has outstanding advantages in terms of sensitivity, selectivity, versatility, and the provision of molecular weight and structural information of compounds, but the equipment is expensive and the operation is complicated

Method used

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  • A kind of assay method of organotin compound
  • A kind of assay method of organotin compound
  • A kind of assay method of organotin compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] In this example, water-soluble organotin compound samples [trimethyltin chloride (TMT, CAS: 1066-45-1) and dimethyltin dichloride (DMTC, CAS: 753-73-1)] were detected Analyze and detect its characteristic atomic emission spectrum at 317.66nm to confirm the detection ability of the present invention for organotin compounds. Atomic emission lines of TMT and DMTC see figure 1, where 301.05, 303.53, 317.66, 326.37nm are qualitative wavelengths of Sn atoms, and 317.66nm with the strongest signal is quantitative wavelengths of Sn atoms. The specific operation steps are: (1) take the water-soluble organotin compound and dissolve it in deionized water to obtain a sample solution, and the sample solution enters from the liquid chromatograph inlet and is separated by a chromatographic column; 4 On-line chemical vapor generation with HCl and continuous generation of active hydrogen atoms H* react with organotin compounds in the sample solution to generate volatile gas SnH 4 , an...

Embodiment 2

[0038] This example examines the influence of HCl concentration on the detection sensitivity of organotin compounds in an online chemical vapor generator. Referring to the operation steps of Example 1, TMT and DMTC were used as test objects, the test range of HCl concentration was 0.5-5%, and other conditions remained unchanged. The experimental result of this embodiment sees figure 2 , thus confirming that the optimum HCl concentration of the present invention is 1%.

Embodiment 3

[0040] This embodiment examines KBH in the chemical steam generator 4 The effect of concentration on the detection sensitivity of organotin compounds. With reference to the operation steps of embodiment one, with TMT and DMTC as test objects, KBH 4 The test range of the concentration is 0.25-2%, and other conditions remain unchanged. The experimental result of this embodiment sees image 3 , thus determining the optimal KBH of the present invention 4 The concentration is 1%.

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Abstract

The invention belongs to the field of analytical chemistry, and relates to a method for measuring organotin compounds. The organotin compound is used as a test object, and water-soluble organotin is converted into volatile gas SnH by on-line continuous derivatization. 4 , using glow discharge micro-plasma to excite tin atoms to generate characteristic emission spectra, and using charge-coupled spectroscopic detectors for data recording and analysis, to achieve quantitative detection of organotin compounds in fruit and vegetable samples. The present invention measures organotin compounds based on chemical vapor generation-tin atomic emission spectroscopy, and converts them into volatile gases continuously on-line through chemical vapor generation, uses glow discharge micro-plasma to excite tin atoms, and quantifies according to the peak area of ​​characteristic emission lines Analysis, to realize the quantitative detection of organotin compounds in fruit and vegetable samples, has the characteristics of high selectivity, fast analysis speed, and good stability.

Description

technical field [0001] The invention belongs to the field of analytical chemistry, and relates to a method for determining organotin compounds, in particular to a liquid chromatography detection method based on chemical vapor generation-tin atomic emission spectroscopy for determining organotin compounds. The organotin compounds are converted into volatile gases, and the tin atoms are excited by the glow discharge micro-plasma to generate the characteristic emission spectrum (317.66nm), and the data analysis is performed using a charge-coupled spectroscopic detector. Background technique [0002] Organotin compounds are metal organic compounds formed by the direct combination of tin and carbon, widely used in heat stabilizers, insecticides, fungicides, disinfectants, antifouling coatings, etc., with reproductive toxicity, genotoxicity, neurotoxicity, Carcinogenicity and other hazards. [0003] Commonly used organotin detection techniques mainly include gas chromatography (G...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/02G01N30/06G01N30/74G01N21/67
CPCG01N30/02G01N30/06G01N30/74G01N21/67G01N2030/027G01N2030/067
Inventor 韩丙军钱兵赵婧何燕彭黎旭
Owner ANALYSIS & TESTING CENT CHINESE ACADEMY OF TROPICAL AGRI SCI