Digestion method of detection of heavy metals in soil

A heavy metal and soil technology, which is used in soil material testing, preparation of testing samples, and material inspection products, etc., can solve the problems of high requirements for inspectors, large amount of reagents, and high risks, and achieves simple digestion process and safe heating method. , the effect of labor cost saving

Inactive Publication Date: 2015-09-23
DALIAN PONY TESTING TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The pretreatment method of heavy metal detection in soil is in accordance with the current national standards such as "GB 17141-1997 Determination of Lead and Cadmium Graphite Furnace Atomic Absorption Spectrophotometry", "GB 17138-1997 Soil Quality Copper and Zinc Determination of Flame Atomic Absorption Spectrophotometry ", "GB17140-1997 Determination of Lead and Cadmium in Soil Quality KI-MIBK Extraction Flame

Method used

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  • Digestion method of detection of heavy metals in soil

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Embodiment 1

[0014] Sample source: National Standard Soil, No. GSS-2 (GBW07402), GSS-12 (GBW07426).

[0015] (1) Pretreatment

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Abstract

The invention discloses a digestion method of detection of heavy metals in soil. The digestion method is characterized by comprising the following steps: only adding a small amount of nitric acid and a small amount of hydrofluoric acid into a sample; after leaving the mixture to stand overnight, digesting on a graphite digestion device at a certain temperature to completely digest the soil sample; detecting with graphite furnace atomic absorption spectrometry or inductively coupled plasma optical emission spectrometry. The digestion method is accurate and reliable, and meets the detection demands.

Description

technical field [0001] The invention relates to the field of pretreatment of heavy metal detection, in particular to the wet digestion method of soil Background technique [0002] The pretreatment method of heavy metal detection in soil is in accordance with the current national standards such as "GB 17141-1997 Determination of Lead and Cadmium Graphite Furnace Atomic Absorption Spectrophotometry", "GB 17138-1997 Soil Quality Copper and Zinc Determination of Flame Atomic Absorption Spectrophotometry ", "GB17140-1997 Determination of Lead and Cadmium in Soil Quality KI-MIBK Extraction Flame Atomic Absorption Spectrophotometry", etc. generally use four-acid digestion (hydrochloric acid, nitric acid, hydrofluoric acid, perchloric acid) method on polytetrafluoroethylene Digestion is carried out in a crucible. This type of method is cumbersome, highly dangerous, consumes a large amount of reagents, and has high requirements for inspectors. It is not suitable for the detection of ...

Claims

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Application Information

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IPC IPC(8): G01N1/44G01N33/24
Inventor 宋薇沙燕明
Owner DALIAN PONY TESTING TECH CO LTD
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