Method for analyzing arsenic content in glass refining agent

Abstract

The invention discloses a method for analyzing arsenic content in a glass refining agent, which comprises the following steps: processing samples by a potassium permanganate preoxidation-hydrofluoric acid wet digestion method to obtain a sample digestion solution; measuring the content of arsenic in the digestion solution by an inductance coupling plasma atomic emission spectrometry. By using potassium permanganate as a pre-oxidizing agent to carry out routine wet acid digestion on glass refining agent samples, the method can effectively avoid volatilizable loss of low-valent arsenic components in the preliminary processing of the samples, therefore, a routine inductance coupling plasma atomic emission spectrometer can be used to directly measure the content of the effective content-arsenic in the glass refining agent without allocating a hydride generator or an atomic fluorescence spectrometer. The method has the advantages of high operability, high analysis speed, high accuracy and favorable sensitivity and repetitiveness.

Description

technical field [0001] The invention belongs to the technical field of physical and chemical testing, and in particular relates to an analysis and determination method for arsenic content in glass clarifiers. Background technique [0002] In the production of glass industry, commonly used glass clarifiers include nitrates, sulfates, ammonium salts, fluorides, rare earth minerals, arsenic trioxide, antimony trioxide, etc. Among them, rare earth elements (such as cerium oxide) are used as glass clarifiers, which have good clarification effect and low pollution, but the disadvantage is that the price is high, and they are usually only used by some large glass manufacturers. Arsenic oxide and antimony oxide are traditional glass fining agents. Although they are toxic, especially arsenic oxide, they are still widely used in glass production because of their high-efficiency clarifying effect and relatively low price, such as most small enterprises. white arsenic, arsenic-antimony...

AI Technical Summary

Problems solved by technology

[0004] The analysis method of arsenic usually includes sample processing and determination. For glass clarifier samples, the effective arsenic components usually exist in a low-valence state. During sample processing, traditional wet acid digestion will cause volatilization loss of arsenic. The test results are seriously low; although the traditional alkali fusion decomposition method can meet the test requirements, the processing process is extremely cumbersome and time-consuming, and the analysis cycle is long. At the same time, it will also bring hidden dangers to the entire analysis system due to the introduction of a large amount of sample matrix and digestion flux. , the analysis accuracy is significantly reduced

[0005] The determination of arsenic usually adopts arsenomolybdenum heteropolyacid spectrophotometry, hydride generation-atomic absorption spectrophotometry, hydride generation-atomic fluorescence spectrometry, polarography and arsenic spot method, etc. The analysis process is cumbersome and time-consuming

Spectroscopic analysis is used to determine arsenic content, usually combining hydride generation (HG) with atomic absorption spectrometry (AAS), plasma atomic emission spectrometry (ICP-OES), atomic fluorescence spectrometry (AFS) or plasma mass spectrometry (ICP-MS ) combined use, that is, by reducing the high-valent arsenic in the sample to trivalent arsenic to form arsenic hydride for determination, so it is usually necessary to be equipped with a hydride generator. At present, no spectroscopic method has been seen to directly measure the effective components in the glass clarifier. Arsenic related reports

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