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

Determination method of cyanogen in thiocyanate

A determination method and thiocyanate technology, applied in the field of chemical analysis, can solve the problem of not measuring cyanide content, etc., and achieve the effects of reliable measurement results, no environmental pollution, and sensitive response.

Active Publication Date: 2012-07-04
HIGH & NEW TECH RES CENT OF HENAN ACAD OF SCI
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, neither the industrial sodium thiocyanate nor the chemical reagent sodium thiocyanate standard (HG-T 3812-2006 and GB / T 1268-1998) has a method for determining its cyanide content, so the establishment of cyanide content in thiocyanate The determination method of root content is very necessary

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
  • Determination method of cyanogen in thiocyanate
  • Determination method of cyanogen in thiocyanate
  • Determination method of cyanogen in thiocyanate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] 1. Reagents and instruments used: Potassium cyanide standard sample (provided by Henan Provincial Analysis and Testing Center); reagent sodium thiocyanate (commercially available, analytically pure); industrial sodium thiocyanate (commercially available); heptahydrate sulfurous acid Iron (analytical pure). UV1800 spectrophotometer.

[0021] Both the reagent sodium thiocyanate and the industrial sodium thiocyanate are prepared as 10% and 50% solutions by mass percentage;

[0022] Mixed sample: 50% sodium thiocyanate solution containing 8 μg / mL cyanide.

[0023] Ferrous sulfate heptahydrate was prepared as a saturated ferrous sulfate solution with deionized water, and set aside.

[0024] 2. Method:

[0025] Accurately weigh 0.25 g of potassium cyanide in a 100 mL volumetric flask, dissolve it with deionized water and make up to the mark to prepare a standard stock solution with a concentration of 2.5 mg / mL. Prepare the standard stock solution with deionized water so t...

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 discloses a determination method of cyanogen in thiocyanate, belonging to the field of chemical analysis. The method is characterized by adding a ferrous sulfate saturated solution in a thiocyanate solution to convert cyanogen into Prussian blue for coloration, and determining the absorbance of the Prussian blue at the wavelength of 700nm, wherein thiocyanate ions are nearly not absorbed within the wavelength range under the same processing condition, and the interference of thiocyanate is avoided. Through the method, favorable linearity is formed within the cyanogen content range of 4-30ppm, the linear regression equation is obtained as follows: Y=0.0261X-0.0433, and the related coefficient r is 0.9993. According to the method, under the existence of sodium thiocyanate withthe concentration of 50%, the relative standard deviation is 2.03%, the standard recovery rate is 98.8%-105.7%, and the minimum quantitative detection limit is 2.04ppm. The method is simple, is high in flexibility, is good in stability, and is low in detection expense, and the used reagents are safe and non-toxic.

Description

technical field [0001] The invention belongs to a method for measuring cyanide content in thiocyanate, relates to a spectrophotometric method for measuring cyanide in thiocyanate, and belongs to the field of chemical analysis. Background technique [0002] Free cyanide is a highly toxic substance, and it is one of the necessary inspection items for environmental monitoring and food analysis. Thiocyanate has a wide range of uses, and sodium thiocyanate is generally produced from sodium cyanide and sulfur as raw materials in industry, so the content of cyanide in thiocyanate directly affects the quality and safety of the product. At present, the methods for determining cyanide mainly include photometric method, chemical titration method (GB / T 23765-2009), ion chromatography and so on. The principle of the chemical titration method (GB / T 23765-2009) for determining cyanide is to complex the silver ion with the cyanide. After the reaction between the cyanide and the silver ion,...

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): G01N21/31
Inventor 李中贤刘小培董学亮刘明徐丹余学军
Owner HIGH & NEW TECH RES CENT OF HENAN ACAD OF SCI
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