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Propylene glycol methyl ether acetate for industrial use (1)
Time of Update: 2021-09-26
1 ScopeThis standard specifies the technical requirements, test methods, inspection rules and signs, packaging, transportation, storage and safety of industrial propylene glycol methyl ether acetate .
For undated reference documents, the latest version is applicable to this standard .
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Propylene glycol methyl ether for industrial use (1)
Time of Update: 2021-09-26
2. 1 Method summaryUsing gas chromatography, under selected working conditions, the sample is vaporized and separated by capillary color harmonic column, detected by flame ionization detector, quantified by area normalization method, and subtracted the water content to obtain propylene glycol methyl ether And the content of 2-methoxy-1-propanol .
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Enantioseparations of Primary Amino Compounds by High-Performance Liquid Chromatography Using Chiral Crown Ether-Based Chiral Stationary Phase
Time of Update: 2020-12-09
Among various crown ether-based CSPs, the stationaryphase based on (+)-(18-crown-6)-2,3,11,12-tetracarboxylic acid covalently bonded to silica gel has been successfully appliedin the resolution of various racemic compounds containing primary amino groups.
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Use of Chiral Crown Ethers in Capillary Electrophoresis
Time of Update: 2020-12-07
This crown ether was shown to be applicable also to the chiral separation of dipeptides ( 12 , 13 ) (Fig. 2 ), sympathomimetics ( 14 ) (Fig. 3 ), and various other drugs containing primary amino groups ( 15 ) by CE.