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Device and method for detecting cyanide in aqueous solution

A detection device and an aqueous solution technology, applied in the field of biochemistry, can solve problems such as inability to obtain valid data, operator errors, and large-scale operations, and achieve the effects of saving time required for distillation, simple preparation of reagents, and elimination of rise or fall

Pending Publication Date: 2022-05-27
BEIJING POLYTECH INSTR
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This manual method of analyzing cyanide levels is time-consuming and hands-intensive, and like all manual techniques, there are significant inherent variations that make the method prone to operator error
At the same time, due to the interference of the protein, false positive results were caused, and valid data could not be obtained.

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  • Device and method for detecting cyanide in aqueous solution
  • Device and method for detecting cyanide in aqueous solution
  • Device and method for detecting cyanide in aqueous solution

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Embodiment Construction

[0041] The present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited to the following embodiments.

[0042] as Figure 1 As shown, a schematic structural diagram of a device for detecting cyanide in an aqueous solution provided for the present invention, comprising a six-way valve 7, a digestion device 8, a membrane gas-liquid separator 10 and an amperometric detector 15. Wherein, the six interfaces of the six-way valve 7 are connected to the sample delivery line 2, the inlet and outlet of the quantitative ring 6, the carrier solution delivery line 20, the first row of waste pipes 18 and the mixed liquid delivery pipeline; wherein the sample delivery line 2 is used to transport the sample to be measured, the sample to be tested is placed in the automatic injector 1, the quantitative ring 6 is used to quantify the sample to be measured, the carrier solution delivery line 20 is used to transport the carri...

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Abstract

The invention discloses a device and a method for detecting cyanide in an aqueous solution. The detection device comprises a multi-way valve, a digestion device, a separator and an ampere detector; an interface of the multi-way valve is respectively connected with a sample conveying pipeline, an inlet and an outlet of the quantitative loop, a carrier solution conveying pipeline, a first waste discharge pipe and a mixed liquid conveying pipeline; a first mixer, a digestion device, a third mixer, a separator and a second waste discharge pipe are sequentially arranged on the mixed liquid conveying pipeline; the first mixer is connected with a first acid solution conveying pipeline; the third mixer is connected with a second acid solution conveying pipeline; the separator is divided into an acid system flow path and an alkali system flow path through a hydrophobic membrane, the acid system flow path is arranged on the mixed solution conveying pipeline, the two ends of the alkali system flow path are connected with the first alkali solution conveying pipeline and the ampere detector respectively, and an outlet of the ampere detector is connected with the third waste discharge pipe. According to the method, the sample preparation time can be saved to the maximum extent, the sample preparation frequency reaches 2min / sample, the detection limit is less than or equal to 0.0007 mg / L (0.7 ug / L), and the determination range is 0.002-0.5 mg / L.

Description

Technical field [0001] The present invention relates to a detection apparatus and detection method of cyanide in an aqueous solution, belonging to the field of biochemical technology. Background [0002] At present, the method of detecting cyanide in the environmental field has manual method and instrument method, the current manual method is HJ484-2009, the method divides the cyanide into total cyanide and easy to release cyanide, these two types of cyanide need to use distillation technology, total cyanide uses phosphoric acid and EDTA, the use of metal ions and EDTA complexing ability than cyanide ion complexing capacity is strong, so that the complex cyanide dissociates out of cyanide ions, and is distilled out in the form of hydrogen cyanide after being absorbed by sodium hydroxide solution, The easy-to-release cyanide is distilled out in the form of easy-to-release cyanide and absorbed with sodium hydroxide by using reagents such as tartaric acid and zinc nitrate. The disti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/00G01N27/30G01N1/44
CPCG01N31/00G01N27/30G01N1/44
Inventor 田莉娟李东旭张林刘辉
Owner BEIJING POLYTECH INSTR
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