KZU272 effective content determination method
Release time：
2025-03-12
1.Acid-base titration
Main Reagents & Instruments
Sodium hydroxide, absolute ethanol, produced in Beijing Chemical Plant, analyzed pure.
Basic burette, stirring device.
Test Method
Prepare it before the test0.1M NaOHstandard solution,10g/L Phenolphthalein indicator. Take one250mlBeaker and add to the beaker25mlAbsolute ethanol and2ml Kzu272and stir to dissolve. Add to the above solution2-3Dropwise prepared phenolphthalein indicator. use0.1M NaOHThe standard solution is titrated. Titrate until the solution is reddish and reddish15minIf the color does not fade, stop the test. Record the consumptionNaOHThe volume of the standardV。
Results and discussion2ml Kzu272The quality of:1.84g。 consumed0.1M NaOHThe volume of the standardVfor59.3ml。
establish Kzu272The median phosphine content is:xrule
1.84x/290=59.3×0.1/1000
get x=0.934
This is how it is measuredKzu272The median phosphine content is:93.4%。
2 Gas chromatography
Instruments and reagents
Agilent Corporation, USA7890Gas chromatographs, droppers, graduated tubes with stoppers, oil baths, etc.
Silylation reagents: hexamethyldisicalamine, trimethylchlorosilane,1，2-Dichloroethane.
Test method: derivatization process
Instrument conditions
Agilent7890Gas Chromatography Conditions:Rtx-5MSpost30rice0.5mmdiameter0.25micron film thickness; Inlet Temperature:280Degree; shuntless method; No shunt time1Minute; Shunt (ml/min）30； Carrier gas velocity:1.2 ml/min； balance flow mode; Vacuum compensation.
table. Programmed Heating Meter
| Heating | temperature℃ | duration min | |
| （℃/min） | |||
| procedure1 | 140 | 0 | |
| procedure2 | 10 | 280 | 0 |
| procedure3 | 20 | 300 | 1 |
KingZu (Lanzhou) Fine Chemical Co., Ltd
KingZu (Lanzhou) Fine Chemical Co., Ltd. is a special extractant production base and new product R&D center of Tianjin KingZu Technology Co., Ltd. It is a scientific and technological enterprise specializing in the research and development, production and sales of mining extraction agents.
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