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Method for measuring total arsenic content in zeolite powder

A determination method and technology of zeolite powder, applied in the direction of measuring device, preparation of test samples, color/spectral characteristic measurement, etc., can solve the problems of instability, large error of total arsenic content results, etc., achieve low detection limit, analysis The effect of high speed and improved analysis speed

Inactive Publication Date: 2020-10-30
GUANGZHOU HUIBIAO TESTING TECH CENT
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  • Abstract
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  • Claims
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Problems solved by technology

Using this method can overcome the shortcomings of the large error and instability of the total arsenic content results obtained after the zeolite powder is treated with hydrochloric acid sample dissolution method

Method used

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  • Method for measuring total arsenic content in zeolite powder

Examples

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Effect test

Embodiment 1

[0034] A kind of embodiment of the assay method of the total arsenic content of zeolite powder of the present invention, the assay method of the total arsenic content of zeolite powder described in the present embodiment is:

[0035] Sample pretreatment: Weigh 0.20g of zeolite powder sample into a microwave digestion tank, add 6mL of 16mol / L nitric acid solution, 2mL of 10mol / L hydrogen peroxide solution, screw the lid on, and place the digestion tank in the microwave In the digestion system, set the digestion program to start digestion. The program is shown in Table 1, and the digestion program with a power of 1200W is used. After cooling, the test solution was obtained. Dilute to a 50mL volumetric flask with ultrapure water, and dilute to the mark. Shake well to obtain the solution to be tested. Prepare blank reagents under the same conditions.

[0036] ICP-MS method was used for analysis and testing: the commercially available 1000 μg / mL arsenic standard solution was dil...

Embodiment 2～7

[0038] The difference between Examples 2-7 and Example 1 is only that the batches of zeolite powder samples weighed are different, and the total arsenic content is different. Comparative example 1

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Abstract

The invention provides a method for detecting the total arsenic content in zeolite powder by using a microwave digestion method to pre-treat a zeolite powder sample and using inductively coupled plasma mass spectrometry as an analysis method. The method comprises the following steps: (1) pretreatment of a sample: adding a zeolite powder sample into a digestion solution, and carrying out microwavedigestion to obtain a test solution, wherein the digestion solution is a mixed solution of nitric acid and hydrogen peroxide; and (2) detection of the total arsenic content: determining the total arsenic content by inductively coupled plasma mass spectrometry. Compared with a traditional detection method taking a hydrochloric acid digestion method as a pretreatment method, the method of the invention has the advantages that when the microwave digestion method is taken as the pretreatment method, a plurality of samples can be treated at the same time, so that the detection efficiency is improved, the digestion process is controlled by a program, the personal error is small, the digestion degree is high, and the operation is simple, convenient, stable and safe; and the inductively coupled plasma mass spectrometry is used for detecting and analyzing the arsenic content, so that the sensitivity and detection result accuracy are high, the analysis speed is high, and the stability is good.

Description

technical field [0001] The invention relates to a detection method, in particular to a detection method for the total arsenic content of zeolite powder in feed. Background technique [0002] Zeolite powder has a certain inhibitory effect on harmful bacteria in the intestinal tract of animals, and can also reduce the level of harmful substances produced by intestinal microbial activities. Zeolite powder can also absorb harmful microorganisms, toxins and ammonia in animals, prolong the residence time of feed in the digestive tract, thereby reducing animal morbidity and improving feed conversion rate, and improving animal production performance and economic benefits. Therefore, zeolite powder is more Widely used in feed production and processing. Zeolite powder belongs to the catalog of feed raw materials, so people pay more attention to its pollution of heavy metals such as lead and arsenic. The determination of total arsenic in zeolite powder is carried out according to the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N1/44G01N21/78G01N21/31G01N21/64
CPCG01N1/28G01N1/44G01N21/78G01N21/31G01N21/6404
Inventor 陈晓强邱禹川李桂玲陈丽斌陈俊平陈丽艳郝燕娟
Owner GUANGZHOU HUIBIAO TESTING TECH CENT
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