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Detection method for mercury in water

A detection method and solution technology, applied in the preparation of test samples, fluorescence/phosphorescence, material excitation analysis, etc., can solve the problems of cumbersome operation of dithizone colorimetry, difficult stability of instrument response value, high instrument cost, etc., to achieve The effect of low detection limit, high sensitivity and fast analysis speed

Active Publication Date: 2015-08-05
SHANDONG GREEN TESTING
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Problems solved by technology

[0004] At present, there are four methods for detecting mercury, namely atomic fluorescence method, cold atomic absorption method, dithizone spectrophotometry and inductively coupled plasma mass spectrometry. There are many factors affecting the occurrence of mercury vapor in cold atomic absorption method, and the instrument response value Not easy to be stable; Dithizone colorimetric method is cumbersome to operate, highly toxic, and low sensitivity; Inductively coupled plasma mass spectrometry has high instrument cost; Atomic fluorescence method has been widely used as a more effective, economical and simple detection method. The existing atomic fluorescence method has the problem of low sensitivity in the detection process

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  • Detection method for mercury in water
  • Detection method for mercury in water
  • Detection method for mercury in water

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[0043] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0044] A method for detecting mercury in water, the method comprising the steps of:

[0045] (1) Processing of samples

[0046] Take 10mL water sample into a microwave digestion tube, add 0.1mL sulfuric acid, 0.1mL 5% potassium permanganate solution, shake well, put the microwave digestion tube in a microwave digestion apparatus, digest at 120°C for 1h, take it out and cool to At room temperature, adding mass concentration to the digestion solution is 10% hydroxylamine hydrochloride solution, (wherein, mass concentration is 10% hydroxylamine hydrochloride solution and adopts the following method t...

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Abstract

The invention belongs to the technical field of detection of mercury in the environment and particularly relates to a detection method for mercury in water. The detection method comprises the following steps: (1) sample treatment; (2) preparation of standard series of mercury solution; (3) drawing of a standard curve; (4) sample detection; and (5) calculation. The detection method provided by the invention has the advantages that under the better experimental condition, the sensitivity is high, the detection limit reaches 0.004mg / L as low as possible, the analysis speed is high and the stability is good.

Description

technical field [0001] The invention belongs to the technical field of detecting mercury in the environment, and in particular relates to a method for detecting mercury in water. Background technique [0002] With the rapid development of the economy, a large amount of untreated wastewater and waste residues are discharged into rivers and lakes, causing water pollution. After inspection, its pollutants are mainly heavy metal ions, for heavy metal ions (mercury Hg 2+ ; lead Pb 2+ ; Cadmium Cd 2+ ; Copper Cu 2+ ), especially mercury, cadmium, lead, copper, etc. have significant biological toxicity. They cannot be degraded by microorganisms in water bodies, and can only undergo mutual conversion and migration of various chemical forms. After entering the environment or ecosystem, it will persist, accumulate and migrate, causing harm. [0003] Among them, mercury is a highly toxic substance ubiquitous in the environment and has a great impact on human health. Physiologica...

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Application Information

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IPC IPC(8): G01N21/64G01N1/44
Inventor 马忠宾刘艳妮刘海英
Owner SHANDONG GREEN TESTING
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