Method for detecting trace mercury and cadmium in water through ICP (inductively coupled plasma) extraction

A technology for detecting water and traces, which is applied in the field of ICP extraction and detection of traces of mercury and cadmium in water, can solve the problems of no selectivity, long time consumption, waste of reagents, etc. Easy to handle effects

Inactive Publication Date: 2017-12-22
深圳市九五至尊珠宝有限公司
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Problems solved by technology

[0003] The pre-treatment and detection of heavy metal mercury and cadmium, currently mostly adopt the traditional dithizone spectrophotometry and GB/T7468-1987, GB/T 7475-1987 water quality determination and the cold atomic absorption spectrophotometry mainly used in relevant standards, Atomic absorption method and atomic fluorescence method, etc. Some of the standard methods can no longer meet the requirements...

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  • Method for detecting trace mercury and cadmium in water through ICP (inductively coupled plasma) extraction

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Embodiment Construction

[0024] 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.

[0025] see figure 1 , a kind of method 1 of ICP extraction detection water trace mercury, cadmium of the present invention, comprises the following steps,

[0026] S1: Prepare a round-bottom centrifuge plastic tube, and add 10mL of sample solution with pH=7.0 into the round-bottom centrifuge plastic tube; drop two drops of neutral red indicator solution, use toner to color the solution to yellow, add complexing The reagent and the sample solution are fully mixed to form a hydrophobic ionic association. After shaking well and standing still, adjust the pH of the mixed solution to 5.0 with a buffer ...

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Abstract

The invention provides a method for detecting trace mercury and cadmium in water through ICP (inductively coupled plasma) extraction. The method comprises steps as follows: S1: a round-bottom centrifugal plastic pipe is prepared, and 10 mL of a sample solution with the pH being 7.0 is added to the round-bottom centrifugal plastic pipe; two drops of a neutral red indicating liquid are dropped, the solution is adjusted to be yellow with a color toner, a complexing agent and the sample solution are added and mixed sufficiently to form a hydrophobic ionic associate, and pH of the mixed solution is adjusted to 5.0 with a buffer solution after the mixture is uniformly shaken and left to stand; S2: 1 mL of an ammonium pyrrolidine dithiocarbamate solution and 1 mL of a Triton X-114 solution with the volume percentage being 20% are continuously added to the sample solution obtained in S2. In the technological procedure, technical features such as color adjustment, centrifugal shaking, temperature control and the like are added, the detection process can be ensured to be more accurate, the accuracy is improved, and the method is easy to operate, facilitates actual treatment, cannot cause heavier pollution and is favorable for popularization and application.

Description

[technical field] [0001] The invention relates to the technical field of trace element detection, in particular to an ICP extraction method for detecting trace amounts of mercury and cadmium in water with strong enrichment ability, simple operation and simultaneous detection of multiple elements. [Background technique] [0002] Heavy metal pollution has always been a concern after the rise of industry. Generally, the toxicity range of heavy metals is about 1-10mg / L, and the concentration range of toxic metals such as mercury and cadmium is 0.01- Between 0.001mg / L. There are many sources of mercury and cadmium. For example, waste batteries contain heavy metal toxic substances such as mercury and cadmium. If the waste batteries are landfilled, the shell of the battery will be corroded and perforated over time, causing harmful substances to enter the soil and water. Pollution to the environment; factories do not discharge sewage according to the indicators, resulting in excess...

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Application Information

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IPC IPC(8): G01N21/73G01N1/28
CPCG01N1/28G01N21/73
Inventor 胡廷坤
Owner 深圳市九五至尊珠宝有限公司
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