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Concentration analysis of mixed trialkylphosphinyl

A technology of trialkylphosphine oxide and concentration analysis, which is applied in chemical analysis by titration, preparation of test samples, etc., can solve the problems of expensive instruments, high price of internal standard substances, and high requirements for impurity content, and achieves a simple process. , the effect of fast analysis and low equipment requirements

Inactive Publication Date: 2007-08-22
TSINGHUA UNIV
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Problems solved by technology

However, the instruments used in this analysis method are expensive, the analysis process is complicated, the required internal standard is expensive, and the requirements for impurity content are high, so it is difficult to meet the needs of organic phase analysis in actual process applications.
[0003] The technical bulletin does not disclose the technical details used in the analysis. The inventor has carried out experiments under various conditions according to the analysis method provided by the method, and the results show that the method cannot meet the needs of analyzing the TRPO concentration in the organic phase under actual process conditions.
[0004] Except for the above content, the inventor has not retrieved the report about the analysis method of trialkylphosphine oxide concentration

Method used

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  • Concentration analysis of mixed trialkylphosphinyl
  • Concentration analysis of mixed trialkylphosphinyl
  • Concentration analysis of mixed trialkylphosphinyl

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] The concentration analysis method of the mixed trialkylphosphine oxide that the present invention proposes, comprises the steps:

[0018] 1) First extract the nitric acid of standard concentration with a series of TRPO equal volumes of known concentrations, each extraction time is greater than or equal to 10min, and the number of extractions is greater than or equal to 3 times, after the extraction, the organic phase containing TRPO and the nitric acid of the standard concentration reach extraction balance;

[0019] 2) Utilize the acid-base titration method to analyze the concentration of nitric acid in the organic phase, draw the standard curve of the TRPO concentration in the organic phase and the nitric acid concentration in the organic phase;

[0020] 3) Extract the standard concentration nitric acid used in step 1) with the equal volume of the organic phas...

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Abstract

A method for analyzing concentration of TRPO includes using known TRPO concentration to extract nitric acid of standard concentration to have organic phase containing TRPO and nitric acid extraction - balanced, using acid - base titration method to analyzing concentration of the two and plotting standard curve of the two, using organic sample to extract nitric acid used as above for achieving extraction balance, utilizing acid - base titration method to analyze nitric acid concentration in organic phase for obtaining TRPO concentration from said standard curve .

Description

technical field [0001] The invention relates to a method for analyzing the concentration of trialkylphosphine oxide (TRPO) mixed in an organic phase, in particular to a method for analyzing the concentration of TRPO in an organic phase composed of TRPO and a diluent, and belongs to the technical field of organic matter concentration analysis. Background technique [0002] U.S. CYANAMID Company mentions a kind of method (The recovery of mineral acids with Cyanex 923extractant, Technical Bulletin No.89-01) using gas chromatography analysis trade name Cyanex 923 a kind of TRPO in this company technical bulletin (Technical Bulletin) . However, the instruments used in this analysis method are expensive, the analysis process is complex, the required internal standard is expensive, and the requirements for impurity content are high, so it is difficult to meet the needs of organic phase analysis in practical process applications. [0003] The technical bulletin does not disclose th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N31/16G01N1/34
Inventor 刘学刚梁俊福孙祥菲
Owner TSINGHUA UNIV
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