Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for determining soil total cyanide--isonicotinic acid--barbituric acid spectrophotometric method

Inactive Publication Date: 2008-09-03
谱尼测试集团股份有限公司
View PDF0 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no method to analyze the total cyanide in soil by isonicotinic acid-barbituric acid spectrophotometry in the country. Therefore, the invention of this method provides a convenient and reliable method for people to analyze and study the total cyanide in soil.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for determining soil total cyanide--isonicotinic acid--barbituric acid spectrophotometric method
  • Method for determining soil total cyanide--isonicotinic acid--barbituric acid spectrophotometric method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1, the detection of soil sample 1# total cyanide concentration:

[0026] Weigh 5.1079g of soil sample 1# to be tested, and add 200mL of distilled water and a few glass beads to a 500mL distillation flask. Add 10mL Na to the distillation flask 2 - EDTA solution and 7-8 drops of methyl orange indicator. Add 10mL of 1% sodium hydroxide solution into the receiving bottle (100mL graduated cylinder) as the absorption liquid, the upper end of the distillate conduit is connected to the outlet of the condenser tube, and the lower end is inserted at least 1cm below the absorption liquid of the receiving bottle. Quickly add 10mL of phosphoric acid to the distillation flask to make the pH<2, and immediately cover the cork. Turn on the condensed water, adjust the adjustable electric furnace, heat and distill the distillate at a rate of 2-4mL / min, and keep the solution in the distillation bottle red. Stop distillation when the solution in the receiving bottle is close t...

Embodiment 2

[0033] The detection of embodiment 2 soil sample 2# total cyanide concentration:

[0034] Weigh 10.0014g of soil sample 2# to be tested, and add 200mL of distilled water and several glass beads to a 500mL distillation flask. Add 10mL Na to the distillation flask 2 - EDTA solution and 7-8 drops of methyl orange indicator. Add 10mL of 1% sodium hydroxide solution into the receiving bottle (100mL graduated cylinder) as the absorption liquid, the upper end of the distillate conduit is connected to the outlet of the condenser tube, and the lower end is inserted at least 1cm below the absorption liquid of the receiving bottle. Quickly add 10mL of phosphoric acid to the distillation flask to make the pH<2, and immediately cover the cork. Turn on the condensed water, adjust the adjustable electric furnace, heat and distill the distillate at a rate of 2-4mL / min, and keep the solution in the distillation bottle red. Stop distillation when the solution in the receiving bottle is close...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a test method, which includes the following steps: distilling soil in pH<2 acidic medium, hydrogen cyanide is formed, absorbing with the sodium hydrate solution, and analyzing total cyanide in soil with isonicotinic acid-barbituric acid spectrophotometry. The invention has the advantages of good sensitivity and good repeatability, which provides a convenient and reliable method for analyzing total cyanide in soil, and meets the needs of soil pollutant analysis as well as research work.

Description

technical field [0001] The invention relates to a method for measuring total cyanide in soil, which is a method for developing color with isonicotinic acid-barbituric acid and quantitatively analyzing with an ultraviolet-visible spectrophotometer. Background technique [0002] Cyanide is a highly toxic substance, and its toxicity to the human body is mainly due to its combination with ferricytochrome oxidase to generate cyanide ferricytochrome oxidase, which loses the function of transferring oxygen and causes tissue hypoxia asphyxia. The main source of cyanide in soil is man-made pollution sources, such as small gold mine mining, smelting, electroplating, organic chemical industry, mineral processing and other industrial waste water polluting nearby and downstream soil resources. When people use these land resources, they will affect people's health. constitutes a great health hazard. At present, there is no method for analyzing total cyanide in soil by isonicotinic acid-b...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01N21/17G01N21/78G06F19/00
Inventor 宋薇
Owner 谱尼测试集团股份有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com