摘要:

AbstractSplitless injection is based on the solvent effect as a mechanism condensing large vapour clouds down to infinitely shortened bands. The effect is controlled by the parameters column temperature, volatility and amount of solvent, and rate of injection. By properly selecting the variables the effect can easily be optimized for any combination of sample and column. It is the purpose of this paper to provide the mechanistic understanding as required for this optimization, as well as some rules for the experimental realization. Potentialities and limitations of splitless injection are discussed, and the role of the solvent effect in on‐column injection is emphasize

ISSN:0935-6304    

DOI:10.1002/jhrc.1240010112

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1978

数据来源: WILEY

ISSN:0935-6304    

DOI:10.1002/jhrc.1240010113

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1978

数据来源: WILEY

摘要:

AbstractA roast coffee infusion (nicaragua arabica) was acidified (pH 1,5) with hydrochloric acid and extracted with diethyl ether in a perforator. After evaporation of the solvent the residue was treated with N‐methyl‐N‐trimethylsilyl trifluoroacetamide and analyzed by glass capillary GC/MS. The main components were identified by their electron impact and isobutane chemical ionization mass spectra. 1,2,4‐trihydroxy benzene, 1‐ethyl‐3, 4‐dihydroxy benzene and 2,3‐dihydroxy toluene were identified as new constituents of roast coffee with possible em

ISSN:0935-6304    

DOI:10.1002/jhrc.1240010114

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1978

数据来源: WILEY

摘要:

AbstractComplete gas‐liquid chromatographic separation of the four 10, 12‐hexadecadiene‐l‐ol isomers using a FFAPcoated glass capillary column is described.These measurements are of importance for the analysis of pheromones from biological sources and for the control of material from stereospecific sy

ISSN:0935-6304    

DOI:10.1002/jhrc.1240010115

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1978

数据来源: WILEY

ISSN:0935-6304    

DOI:10.1002/jhrc.1240010116

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1978

数据来源: WILEY

ISSN:0935-6304    

DOI:10.1002/jhrc.1240010117

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1978

数据来源: WILEY

ISSN:0935-6304    

DOI:10.1002/jhrc.1240010119

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1978

数据来源: WILEY

ISSN:0935-6304    

DOI:10.1002/jhrc.1240010101

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1978

数据来源: WILEY