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Method for testing moisture content by sulfonyl isocyanate pre-column derivation method

A sulfonyl isocyanate, pre-column derivatization technology, applied in the field of analytical chemistry, can solve the problems of expensive instruments, difficult to popularize, cumbersome operation, low accuracy, etc., and achieves the effects of fast measurement, low cost, and few side reaction products.

Inactive Publication Date: 2007-05-16
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The methods such as above-mentioned oven-drying method, toluene method, decompression drying method, Fischer's volumetric titration method have the shortcoming that operation is loaded down with trivial details, accuracy is low, easily interfered; The equipment is expensive and difficult to popularize

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  • Method for testing moisture content by sulfonyl isocyanate pre-column derivation method
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Embodiment 1

[0024] Instruments and Conditions:

[0025] Japan Shimadzu 10A high performance liquid chromatography system, including binary gradient system, column temperature control box, UV-Vis variable wavelength detector, Hangzhou Yingpu HS2000 workstation and 20μL manual sampling system; chromatographic column: 150×4.6mm ID , 5μm Diamonsil TM C 18 (DIKMA); water phase: weigh 0.69gKH 2 PO 4 Dissolve in 500ml of pure water, and adjust the pH to 2.5 with phosphoric acid. Organic phase: acetonitrile. Equivalent elution, aqueous phase: organic phase = 55:45; flow rate: 1.0 mL / min; column temperature: 25°C; detection wavelength: 227nm; injection volume: 20 μL.

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Abstract

This invention relates to sulfonylisocyanates resin column derived method to test water content in analysis chemical field, which comprises the following steps: using sulfonylisocyanates resin compound as derive agent added with hydroxyl group or sulfhydryl group compound to terminate reaction. The invention method is combined with high effective liquid phase spectrum and quantum spectrum, capillary electrophoresis or quantum spectrum or film spectrum method to realize the water accurate measurement.

Description

technical field [0001] The invention belongs to the field of analytical chemistry and relates to a pre-column derivatization method for water, in particular to a method for measuring water content by using a sulfonyl isocyanate pre-column derivatization method (DZY method for short). Background technique [0002] The methods disclosed in the prior art for determining moisture in samples mainly include drying method, toluene method, decompression drying method, gas chromatography, Fischer volumetric titration method, Karl Fischer moisture titrator method and the like. The methods such as above-mentioned oven-drying method, toluene method, decompression drying method, Fischer's volumetric titration method have the shortcoming that operation is loaded down with trivial details, accuracy is low, easily interfered; The equipment required is expensive and difficult to popularize. [0003] In the research in the field of analytical chemistry, researchers have been looking for a me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/00G01N1/28
Inventor 段更利周涛郁颖佳
Owner FUDAN UNIV
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