Method for detecting alkyl mercury in water

A detection method and technology of alkyl mercury, which can be used in measurement devices, instruments, scientific instruments, etc., can solve problems such as low sensitivity, and achieve the effects of high sensitivity, environmental friendliness and simple operation.

Active Publication Date: 2015-03-04
SHANDONG WATER & WASTEWATER MONITORING CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the combined technology has improved the selectivity of the method, most of them have the defect of low sensitivity

Method used

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  • Method for detecting alkyl mercury in water
  • Method for detecting alkyl mercury in water
  • Method for detecting alkyl mercury in water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0096] 1. Find the linear relationship regression equation

[0097] The standard series concentrated solution that standard series enrichment (1) obtains is measured under instrument working condition (2), and the chromatographic peak area that alkylmercury concentration produces with instrument measurement presents good linear relationship, obtains the linear relationship regression equation ( 1):

[0098] Methylmercury: y=5600.9x+2004.5 R=0.997

[0099] Ethylmercury: y=4425.3x+1879.6 R=0.996

[0100] The detection technical indicators are shown in Table 1.

[0101] 2. Determination of water samples

[0102] The concentrated solution obtained by enriching the water sample (1) is measured under the instrument working condition (2), and calculated according to the linear relationship regression equation (1), the concentrations of methylmercury and ethylmercury in the water sample are all lower than the method The detection limit.

Embodiment 2

[0104] 1. Find the linear relationship regression equation

[0105] The standard series concentrated solution obtained by the standard series enrichment (2) is measured under the instrument working condition (1), and the chromatographic peak area produced by the concentration of alkylmercury and the instrument measurement presents a good linear relationship, and the linear relationship regression equation ( 2):

[0106] Methylmercury: y=6205.4x+2232.7 R=0.999

[0107] Ethylmercury: y=5012x+2061.5 R=0.995

[0108] The detection technical indicators are shown in Table 1.

[0109] 2. Determination of water samples

[0110] The concentrated solution obtained by enriching the water sample (2) was measured under the instrument working condition (1), and calculated according to the linear relationship regression equation (2), the concentrations of methylmercury and ethylmercury in the water sample were respectively 1.2 ng / L, 0.8ng / L.

Embodiment 3

[0112] 1. Find the linear relationship regression equation

[0113] The standard series concentrated solution obtained by the standard series enrichment (3) is measured under the instrument working condition (3), and the chromatographic peak area produced by the concentration of alkylmercury and the instrument measurement presents a good linear relationship, and the linear relationship regression equation ( 3):

[0114] Methylmercury: y=5824.3x+1897.4 R=0.998

[0115] Ethylmercury: y=4752.8x+5014.4 R=0.999

[0116] The detection technical indicators are shown in Table 1.

[0117] 2. Determination of water samples

[0118] The concentrated solution obtained by enriching the water sample (3) is measured under the instrument working condition (3), and calculated according to the linear relationship regression equation (3), the concentrations of methylmercury and ethylmercury in the water sample are all less than the method The detection limit.

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Abstract

The invention discloses a method for detecting alkyl mercury in water based on a solid-phase extraction gathering and liquid-phase chromatograph-ICP-MS combined technology. The method comprises the following steps: a, gathering an alkyl mercury mixed standard series in a solid phase extraction manner; b, determining the gathered alkyl mercury mixed standard series by utilizing HPLC-ICP-MS to obtain a linear relation equation between the concentration of the standard series and an area of a chromatographic peak; c, gathering alkyl mercury in an unknown water sample in a solid-phase extraction manner; d, determining the gathered alkyl mercury of the unknown water sample by utilizing PLC-ICP-MS, substituting the obtained peak area into the linear equation, and calculating to obtain the concentration of the alkyl mercury in the water. By adopting the method, the linear detection range of the alkyl mercury is wide, and the detection limit is low. The method has characteristics of simplicity in operation, high accuracy, high sensitivity, high automation degree, environmental friendliness and the like and is suitable for determining alkyl mercury in surface water, water from sewage factories and water in water supply pipe network.

Description

technical field [0001] The invention relates to a method for detecting alkylmercury (methylmercury, ethylmercury) in water, in particular to a method for detecting alkylmercury (methylmercury, ethylmercury) in water based on liquid chromatography-inductively coupled plasma mass spectrometry technology. ) detection method belongs to the technical field of water quality environment monitoring. Background technique [0002] Mercury is present in the environment as inorganic mercury, gaseous elemental mercury (Hg 0 ) and organic mercury in three forms. The biochemical behavior and toxicity of mercury compounds are closely related to their chemical forms. Organic mercury is more toxic than inorganic mercury, and methylmercury is the most toxic. Organomercury compounds are the main pathways of mercury biotransmission. Organomercury mainly exists in the form of alkylmercury, which is easily absorbed and utilized by organisms, and decomposes slowly in organisms (half-life is about...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/88
Inventor 贾瑞宝孙韶华辛晓东王明泉
Owner SHANDONG WATER & WASTEWATER MONITORING CENT
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