硫氯分析仪(微库仑法)校准方法的研究
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摘要
硫氯分析仪是根据微库仑原理,样品中各种形态的硫(氯)在氮气和氧气中于高温下变成二氧化硫(全部变成HCl),进入滴定池,通过电解产生碘与二氧化硫反应(在池中通过电解产生银离子与氯离子反应),微机根据产生的碘消耗的电量(微机根据产生的银离子消耗的电量),依据法拉第定律,自动算出样品中的总硫含量(总氯含量),广泛应用于石油、化工、科研、教学、环保、质检、商检等行业,但目前并没有相应的规程或规范作为硫氯分析仪的校准依据。本文对硫氯分析仪的工作原理进行了归纳和分析,依据现有的量值溯源方法和体系对硫氯分析仪的校准和量值溯源进行了探讨。
The sulfur-chlorine analyzer is based on the principle of microcoulomb. The various forms of sulfur( chlorine) in the sample are transformed into sulfur dioxide( HCl) at high temperature in nitrogen and oxygen. It enters the titration cell and reacts with iodine and sulfur dioxide by electrolysis( silver ion reacts with chloride ion in the cell). The computer consumes the amount of iodine( silver ion produced by the computer according to the amount of silver ion produced by the computer). According to Faraday's law,the total sulphur content( total chlorine content) in the sample can be calculated automatically. It is widely used in petroleum,chemical industry,scientific research, teaching, environmental protection, quality inspection, commodity inspection and other industries. However,there are no corresponding regulations or specifications as the calibration basis of sulphur-chlorine analyzer. In this paper,the working principle of sulphur-chlorine analyzer is summarized and analyzed. Based on the existing traceability methods and systems,the calibration and traceability of sulphur-chlorine analyzer are discussed.
The sulfur-chlorine analyzer is based on the principle of microcoulomb. The various forms of sulfur( chlorine) in the sample are transformed into sulfur dioxide( HCl) at high temperature in nitrogen and oxygen. It enters the titration cell and reacts with iodine and sulfur dioxide by electrolysis( silver ion reacts with chloride ion in the cell). The computer consumes the amount of iodine( silver ion produced by the computer according to the amount of silver ion produced by the computer). According to Faraday's law,the total sulphur content( total chlorine content) in the sample can be calculated automatically. It is widely used in petroleum,chemical industry,scientific research, teaching, environmental protection, quality inspection, commodity inspection and other industries. However,there are no corresponding regulations or specifications as the calibration basis of sulphur-chlorine analyzer. In this paper,the working principle of sulphur-chlorine analyzer is summarized and analyzed. Based on the existing traceability methods and systems,the calibration and traceability of sulphur-chlorine analyzer are discussed.
引文
[1]JJF 1059.1-2012《测量不确定度评定与表示》.
[2]JJF1321-2011《元素分析仪国家校准规范》.
[3]GB/T 18612-2011《原油中有机氯含量的测定国家标准》.
[4]SH/T 0253-92《轻质石油产品中总硫测定法(电量法)石化行业标准》.
[2]JJF1321-2011《元素分析仪国家校准规范》.
[3]GB/T 18612-2011《原油中有机氯含量的测定国家标准》.
[4]SH/T 0253-92《轻质石油产品中总硫测定法(电量法)石化行业标准》.