Flow injection colorimetry cyanogen measuring instrument for measuring cyanide content

Abstract

The invention relates to a cyanide detection instrument for detecting the content of the cyanide by flow injection colorimetry, comprising a sample pretreatment device and a developing detection device, wherein, the pretreatment device comprises a peristaltic pump, an automatic sample injector connected with the peristaltic pump, and an online heating module connected with an online distillation module, the distillation module is connected with a container containing the sodium hydroxide absorption liquid which is connected with the peristaltic pump and a six-way valve, a three-way pipe is connected with a pipeline for distilling the reagent solution, the online heating module comprises a heating rod, an aluminium body sleeved outside the heating rod, a polytetrafluoroethylene capillary tube wound on the aluminium body, and a temperature-measuring thermal resistance, one end of the polytetrafluoroethylene capillary tube is connected with the pump pipe of the peristaltic pump, and the other end is screwed into three-way pipe through a screwed joint. The instrument is applicable to the field, like environment, food, and hygiene and disease control. By using online heating and the microporous film, the online distillation of the cyanide can be realized with reduced analysis time, in addition, the instrument has simple structure, the detection is accurate, and the detection limit is low.

Description

[0001] The present invention is a divisional application of No. 200510083983.0 invention patent application. The filing date of the original application is July 15, 2005. The title of the invention is "a flow injection colorimetric cyanide measuring instrument and its method for measuring cyanide". technical field [0002] The invention relates to simple cyanide and partially complexed metal cyanide analysis equipment, in particular to a cyanide measuring instrument for flow injection colorimetric method for measuring cyanide content. Background technique [0003] At present, the determination of simple cyanide and partially complexed metal cyanide is mostly carried out manually according to the national standard method. Gao, a skilled technician, needs at least two hours to analyze a sample. Although the flow injection technology is also applied to the determination of cyanide, the pretreatment part is still designed according to the manual distillation method. Recently, th...

AI Technical Summary

Problems solved by technology

[0003] At present, the determination of simple cyanide and partially complexed metal cyanide is mostly carried out manually according to the national standard method. Gao, a skilled technician, needs at least two hours to analyze a sample. Although flow injection technology is also applied to the determination of cyanide, the pretreatment part is still designed according to the method of manual distillation.

Recently, there are companies such as Dutch Skalar, German BRAN + The continuous flow analyzer of LUEBBE Company can realize the mechanization and automation of manual operation, but its structure is complex and expensive, and it needs to use a large amount of reagents and add bubble devices

Images