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Quartz tube device for determining trace total sulfur and trace total chlorine

A quartz tube and micro-quantity technology, applied in the preparation of test samples, electrochemical variables of materials, etc., can solve the problems of reduced conversion rate and failure to meet analysis requirements, etc., and achieve small interference factors, stable baseline, high conversion rate and sensitivity Effect

Active Publication Date: 2013-11-20
CHINA PETROLEUM & CHEM CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the quartz tube is used for a period of time, the conversion rate drops and cannot meet the analysis requirements, so a new quartz tube needs to be replaced

Method used

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  • Quartz tube device for determining trace total sulfur and trace total chlorine
  • Quartz tube device for determining trace total sulfur and trace total chlorine
  • Quartz tube device for determining trace total sulfur and trace total chlorine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0058] Embodiment 2, measuring trace total chlorine content in the sample.

[0059] Instrument Operating Conditions

[0060] Coulomb chlorine analyzer, chlorine titration cell: Jianghuan or Jiangyan Analytical Instrument Co., Ltd.; bias voltage is 240 mv ~ 260 mv, and other operating conditions are the same as those for sulfur determination. The total chlorine content in the sample was determined according to the operation method for determining the total sulfur, and the measurement results are shown in Table 4.

[0061]

[0062] It can be seen from Table 4 that the traditional method is consistent with the improved method.

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Abstract

The invention relates to a quartz tube device for determining the trace total sulfur and the trace total chlorine, which is applicable to analysis for the contents of the trace total sulfur and the trace total chlorine in a sample by a coulometry method. The quartz tube device is characterized in that a spiral oxygen pipeline (6) is inserted into a gasification section (1), and a straight-through nitrogen pipe (3) is inserted into a combustion section (2); a sample-injectable three-way needle protective sleeve (5) is inserted into the gasification section (1); a sample injection port (501) of the sleeve is used for sample injection of a gas sample injector; another sample injection port (502) of the sleeve is used for sample injection of an injector. The quartz tube device has the advantages that a sample is directly combusted at the gasification section of a quartz tube, the caking and absorption of the sample at the gasification section are avoided, the interference of carrier gas and the like is eliminated, the conversion rate and the sensitivity of the instrument are improved, the service life of the quartz tube is prolonged, the debugging time of an instrument is shortened, the operation is simplified, the carrier gas cannot be used or instrument air is used for replacing the carrier gas, and the production cost can be reduced.

Description

technical field [0001] The invention is suitable for coulometric analysis of trace total sulfur and total chlorine content in a sample, and can also be used for ultraviolet fluorescence method determination of total nitrogen content. Background technique [0002] Trace amounts of sulfides in petrochemical products can poison catalysts in downstream processing, and trace amounts of chlorides are easily converted into hydrochloric acid, which corrodes equipment. Therefore, butene-1, propylene, hydrogen, and reforming feeds all need to control total Chlorine content, the control index is less than 0.5mg / kg. The traditional analysis method for the trace total sulfur and total chlorine content in the sample is the coulometric method. Its principle is that the trace sulfide and chloride in the sample are first gasified in the gasification section of the quartz tube, and then enter the combustion section of the quartz tube for combustion. , the combustion products enter the ti...

Claims

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Application Information

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IPC IPC(8): G01N27/42G01N1/28
Inventor 单石文黎仕克邵波刘宁区汝森李景娆
Owner CHINA PETROLEUM & CHEM CORP