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Method for simultaneously determining contents of various elements in soil or deposits

A technology for element content and sediments, which is used in measurement devices, preparation of test samples, material excitation analysis, etc. It can solve the problems of narrow application range, cumbersome element determination methods, and complicated digestion steps, so as to prevent cross-contamination and shorten the The effect of digestion time and shortening of measurement time

Inactive Publication Date: 2016-05-25
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
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Problems solved by technology

[0003] In order to solve the problems of complicated digestion steps of existing soil or sediment samples, narrow scope of application and complicated element determination methods, the present invention proposes the following technical solutions:

Method used

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  • Method for simultaneously determining contents of various elements in soil or deposits
  • Method for simultaneously determining contents of various elements in soil or deposits
  • Method for simultaneously determining contents of various elements in soil or deposits

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Embodiment Construction

[0018] 1. GSS-15 standard soil sample (GBW07429, Yangtze River plain area)

[0019] The present embodiment applies the method of the present invention to the determination of metal elements and phosphorus elements in soil samples, and the specific determination steps are as follows:

[0020] (1) Accurately weigh 0.1000±0.0010g of the ground dry soil sample to be tested, place it in a 10mL TFM polytetrafluoroethylene microwave digestion tank, add 6mL of high-grade pure aqua regia (the volume ratio of concentrated nitric acid and concentrated hydrochloric acid is 1: 3) and 2mL of high-grade pure hydrofluoric acid, let it stand for 10 minutes, and use the digestion solution without adding soil samples as a blank control;

[0021] (2) The temperature and time parameters of the microwave digestion program are set, and the solution in the above step (1) is subjected to microwave digestion. The specific microwave digestion program is as follows:

[0022]

[0023] (3) After the mi...

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Abstract

The invention relates to detection technology for element contents, and provides a method for simultaneously determining contents of arsenic, cadmium, lead, vanadium, zinc, manganese and phosphor in soil or deposits. The method mainly comprises the following steps: (1) 0.1g of a grinded drying soil sample is accurately weighed and placed in a TFM microwave digestion pot, a certain proportion of aqua regia and hydrofluoric acid are added, and a solution is allowed to stand; (2) an appropriate microwave digestion program is set, and microwave digestion is carried out for the solution in the step (1); (3) after the microwave digestion program ends, an acid-driving device is used for heating and evaporating the digestion solution in the step (2) to a dry state, and total transfer, volumetric flask preparation, and filtering are carried out; (4) ICP-OES is used for determining contents of arsenic, cadmium, lead, vanadium, zinc, manganese and phosphor in the clear liquor in the step (3); (5) ICP-MS is used for determining contents of elements in the clear liquor in the step (3) which do not reach detection limits in the step (4) once more. The method has the advantages of simple steps, simplified operation, saved soil samples, reduced personal error, minimized environment interference, and improved working environments.

Description

technical field [0001] The invention relates to detection technology of element content. Background technique [0002] my country's current monitoring standards for soil or natural water sediments are mainly "Technical Specifications for Soil Environment Monitoring" (HJ / T166-2004) issued by the former State Environmental Protection Administration, and "Lead, Cadmium, Vanadium, Phosphorus, etc." issued by the Ministry of Water Resources. "Determination of 34 Elements" (SL394-2007) and "Marine Monitoring Regulations" (GB17378-2007) jointly promulgated by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China and the National Standardization Administration Atomic Fluorescence Method" (GB / T22105-2008). These standards use electric hot plate (most elements) or water bath (arsenic) digestion method to pre-treat soil or sediment samples. These methods are complicated to operate, large in sampling volume, time-consuming and labo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/73G01N27/62G01N1/28G01N1/44
Inventor 单保庆狄贞珍张洪
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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