Unlock instant, AI-driven research and patent intelligence for your innovation.

Quantitative analysis method for determination of sulfur in organic thiosulfate

A technology for quantitative analysis of thiosulfate, applied in the field of testing and analysis, can solve problems such as complex processing process, low absolute sulfur content, and many interference factors, and achieve good repeatability, less interference factors, and less environmental pollution.

Active Publication Date: 2017-09-29
BEIJING RED AVENUE INNOVA
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are many methods for determining sulfur, most of them have their own limitations. For example, the titration method is time-consuming and the measurement range is narrow; although the infrared method is simple and fast, it is difficult to determine the sulfur in inorganic substances, and the absolute sulfur content that can be determined Low; spectrophotometry is time-consuming and complex, and is suitable for the determination of low-content samples; X-ray fluorescence spectroscopy, inductively coupled plasma atomic emission spectroscopy and inductive coupling, etc., have many interference factors, such as when using ICP-MS. 16 o 16 o + , 14 N 18 o + , 15 N 17 o+, 14 N 17 o 1 h + A variety of polyatomic ions can form interference
Due to complex techniques such as spectral line selection, background correction and spectral interference, the application of these methods in routine analysis is limited.

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
  • Quantitative analysis method for determination of sulfur in organic thiosulfate
  • Quantitative analysis method for determination of sulfur in organic thiosulfate
  • Quantitative analysis method for determination of sulfur in organic thiosulfate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Step 1: Drawing of standard curve

[0051] Accurately weigh 19.39g sodium thiosulfate (Na 2 S 2 o 3 ·5H 2O) In a beaker, add water to dissolve it completely, and set the volume in a 100mL volumetric flask to prepare a solution (50g / L); accurately measure the above solution in different volumes (0.0, 2.0, 4.0, 6.0, 8.0, 10.0) Put it in a 50mL volumetric flask, and then dilute it into 6 kinds of standard solutions with different concentrations; scan the standard solution with representative CS lines (257.594nm, 257.961nm and 258.056nm), and adjust the flame height and combustion ratio Finally, select the flame height as: 13mm; air flow: 110L / h; fuel-assist ratio: 0.274, and the absorption line with the maximum absorbance value: 257.594nm. Measure the absorbance of standard solutions with different concentrations at the maximum absorption line 257.594nm, and draw a standard curve.

[0052] Table 1 Drawing of standard curve

[0053] Draw the volume of sulfur ...

Embodiment 2

[0085] Step 1: Preparation of Sulfur Standard Curve

[0086] Accurately weigh 19.39g sodium thiosulfate (Na 2 S 2 o 3 ·5H 2 O) In a beaker, add water to dissolve it completely, and set the volume in a 100mL volumetric flask to prepare a solution (50g / L); accurately measure the above solution in different volumes (0.0, 2.0, 4.0, 6.0, 8.0, 10.0) Put it in a 50mL volumetric flask, and then prepare standard solutions with different concentrations of 0-10g / L; use representative CS spectral lines (257.594nm, 257.961nm and 258.056nm) to scan the standard solution of the maximum sulfur concentration, and conduct a flame comparison Adjust the height and fuel-assist ratio, and finally select the flame height: 13mm; air flow: 110L / h; fuel-assist ratio: 0.274, and select the absorption line with the largest absorbance value: 257.594nm. Measure the absorbance of standard solutions with different concentrations at the maximum absorption line 257.594nm, and draw a standard curve.

[008...

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 present invention aims to provide an analysis method for measuring the sulfur content in organic thiosulfate with a continuous light source atomic absorption spectrometer (CS-AAS). The method is simple to operate, has high accuracy of analysis results and small error. The specific steps include: choosing sodium thiosulfate as a standard substance, directly dissolving it in water, preparing standard solutions of different concentrations, selecting a suitable fuel-assistance ratio, flame height and maximum absorption line through a continuous light source atomic absorption spectrometer, and drawing a standard curve; The organic thiosulfate is directly dissolved in water, and the sulfur content is determined in combination with the standard curve.

Description

technical field [0001] The invention belongs to the field of testing and analysis, in particular to a quantitative analysis method for sulfur content in organic thiosulfates. Background technique [0002] Sulfur is an important basic element of human beings, animals and plants, mainly in the form of proteins and enzymes. Sulfur is ubiquitous and exists in different forms in the earth's crust. It is the 15th most abundant element in the earth's crust, with a sulfur content of about 0.048%, and is used in many fields of science and technology. [0003] With the development of the rubber tire industry, the research and production of rubber additives have attracted more and more attention. Sulfur-containing processing aids play a very important role in the rubber vulcanization process. Monsanto Corporation of the United States initially developed Duralink HTS in the 1980s to improve the stability of polysulfide crosslinks. Duralink HTS contains sulfur atoms and carbon atoms. ...

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
Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/33
CPCG01N21/33
Inventor 胡小娜李秋荣甄博鸣赵丽丽刘哲董栋
Owner BEIJING RED AVENUE INNOVA