Method for detecting inorganic mercury and organic mercury in environmental water sample

A detection method and inorganic mercury technology, applied in the field of environmental sample detection, can solve problems such as difficult detection

Inactive Publication Date: 2015-01-07
SHAANXI HUALU CHEM ENVIRONMENTAL PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low mercury content, it is difficult for general monitoring methods to accurately detect or distinguish the content of inorganic mercury and organic mercury. Therefore, the detection of total mercury, organic mercury, and inorganic mercury in water is a major difficulty in water quality testing.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) Preparation of standard curve: Prepare a series of mercury standard working solutions with chromatographic standard samples in a 25mL colorimetric tube, add 4mL concentrated hydrochloric acid, and then add 0.20mL brominating agent (weigh 0.1400g potassium bromate and 0.2000g bromine Dissolve potassium chloride in 100mL distilled water), cover the cork, let stand at room temperature for 10 minutes, add dropwise 0.1% hydroxylamine hydrochloride solution (weigh 0.1000g hydroxylamine hydrochloride and dissolve in 100mL distilled water) until the slight yellow color of bromine fades, dilute with water to Scale, shake well, under certain instrument and working parameters (instrument and working parameters are atomic fluorescence photometer, lamp current 30mA, observation height 7mm, carrier gas Ar flow rate 600mL / min, negative high pressure 280V, pump speed 90r / min, The sampling time is 8S, and the injection time is 14S) to measure the fluorescence signal and draw the work...

Embodiment 2

[0018] Embodiment two: the mensuration of actual water sample

[0019] Using the detection method described in the present invention, the detection of organic mercury and inorganic mercury content is carried out to certain two sample water bodies, and the detection results are shown in Table-1.

[0020] Table-l Test results (ng / ml)

[0021] .

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Abstract

The invention relates to a method for detecting inorganic mercury and organic mercury in an environmental water sample, belonging to the field of environmental sample detection methods. The invention provides a method for accurately detecting inorganic mercury and organic mercury, which aims at solving the problem that a traditional monitoring method has difficulty in accurately detecting or distinguishing the content of inorganic mercury and organic mercury. The method is characterized in that total mercury and inorganic mercury are respectively determined by adopting a flow injection online hydride generation-atomic fluorescence spectrometry in the presence or absence of a brominating agent which serves as a digesting agent for organic mercury, and the content of organic mercury is solved by adopting a subtraction method. The detection method is simple and rapid to operate, high in sensitivity and less in interference; proved in a labeling recycling experiment, the recycling rate can reach 95 percent to 105 percent.

Description

technical field [0001] The invention relates to a method for detecting inorganic mercury and organic mercury in environmental water samples, and belongs to the field of detection methods for environmental samples. Background technique [0002] Mercury exists in various forms in nature. There are different forms of mercury in both the atmosphere and water, and the toxicity of mercury is different due to the different forms of mercury. Studies have shown that inorganic mercury can be produced through biological methylation, ethylation and other reactions Corresponding organic mercury, while organic mercury can be absorbed passively and by plants, and enriched through the food chain, eventually endangering human health. Therefore, the speciation analysis of mercury has attracted the attention of the environmental analytical chemistry community. [0003] At present, the forms of mercury are generally various forms of organic mercury and inorganic mercury, and the analysis metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64
Inventor 陆强
Owner SHAANXI HUALU CHEM ENVIRONMENTAL PROTECTION
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