Method for determination of inorganic element in fuel gas

Abstract

The invention provides a method for determination of inorganic element in fuel gas, comprising the following steps: sample collection: the fuel gas is divided into two parts so as to flow through cation absorption liquid and anion absorption liquid respectively after the fuel gas flows through a filter membrance; sample handling: the filter membrance is equally divided into two parts, one part of the filter membrance is dispelled by acid liquor, then the cation absorption liquid is added, and through metered volume and filtering, filtrate for cation analysis is obtained, and the other part of the filter membrance is extracted with water, then the anion absorption liquid is added into the extract liquor, and through metered volume and filtering, filtrate for anion analysis is obtained; sample analysis: above filtrates are respectively subsjected to capillary electrophoresis test, and then data is treated. According to the method and the device provided by the invention, the defects of low efficiency, long consuming time, higher analytical cost and difficult in popularizing in traditional method are overcame. The aim to quick test multiple inorganic elements is realized, the operation cost is lower, the operation is simple, and the method is convenient to popularize.

Description

technical field [0001] The invention belongs to the field of chemical analysis and testing, and in particular relates to a rapid determination method for inorganic elements in gas. Background technique [0002] Due to the influence of formation and environment, the gas often contains different concentrations of inorganic elements. These inorganic elements exist in the form of small solid particles, mist and gas. When these inorganic elements settle and adhere to or permeate on the surface of various equipment, components and materials used in the gas industry, it will cause hazards such as metal corrosion and material aging. However, there is no mature collection device and determination method for inorganic elements in gas so far. [0003] At present, the methods of collecting inorganic elements in gas can be divided into gas-solid adsorption method and gas-liquid absorption method. Uddin et al. (Energy Fuels, 2009, 23, 4710-4716) and Ozaki et al. (Fuel, 2008, 87, 3610-3...

AI Technical Summary

Problems solved by technology

These methods have played an important role in the analysis of inorganic elements, but some of their shortcomings also hinder their own application and development

The atomic absorption method cannot detect inorganic elements at the same time, and the light source needs to be replaced every time an element is detected, which is cumbersome to operate

Inductively Coupled Plasma-Atomic Emission Spectrometry is not Sensitive to Some Nonmetallic Elements

Inductively coupled plasma-mass spectrometry, expensive instruments, high analysis costs, not conducive to popularization, and not suitable for the detection of some non-metallic elements

Although ion chromatography has made outstanding contributions to the detection of non-metallic elements, its analysis time is long, the sensitivity is often not up to the detection requirements under trace conditions, and complex sample pre-concentration steps are required

In addition, Rupp et al. (Anal.Chem., 2010, 82, 6315-6317) used gas chromatography-mass spectrometry to detect trace Hg, AsH 3 ,PH 3 and H 2 However, this method is only suitable for the detection of some volatile inorganic elements, and cannot detect most inorganic elements, especially metal elements.

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