The potential of on-line flame photometric detection in microcolumn liquid chromatography

1989 ◽  
Vol 12 (12) ◽  
pp. 793-796 ◽  
Author(s):  
Ch. Kientz ◽  
A. Verweij ◽  
G. J. de Jong ◽  
U. A. Th. Brinkman
Keyword(s):  
Liquid Chromatography ◽  
Microcolumn Liquid Chromatography ◽  
Photometric Detection ◽  
Flame Photometric Detection ◽  
On Line

On-line flame photometric detection in micro-column liquid chromatography

1989 ◽  
Vol 467 ◽  
pp. 385-394 ◽  
Author(s):  
Ch.E. Kientz ◽  
A. Verweij ◽  
H.L. Boter ◽  
A. Poppema ◽  
R.W. Frei ◽  
...  
Keyword(s):  
Column Liquid Chromatography ◽  
Liquid Chromatography ◽  
Photometric Detection ◽  
Flame Photometric Detection ◽  
On Line ◽  
Micro Column Liquid Chromatography

Gas-Liquid Chromatography and Liquid Chromatography of Ethylenethiourea in Fresh Vegetable Crops, Fruits, Milk, and Cooked Foods

1977 ◽  
Vol 60 (5) ◽  
pp. 1105-1110 ◽  
Author(s):  
John H Onley ◽  
Laura Giuffrida ◽  
N Fred Ives ◽  
Randall R Watts ◽  
Robert W Storherr
Keyword(s):  
Liquid Chromatography ◽  
Aluminum Oxide ◽  
Thin Layer ◽  
Gas Liquid Chromatography ◽  
Vegetable Crops ◽  
Photometric Detection ◽  
Fresh Vegetable ◽  
Flame Photometric Detection ◽  
Aluminum Oxide Column ◽  
Layer Chromatography

Abstract The Onley-Yip procedure for determining ethylenethiourea (ETU) in milk and crops was modified to reduce interferences by the ethylenebisdithiocarbamates (EBDCs). A 20 g cropmethanol extract is cleaned up by adsorbing the sample onto Gas-Chrom S, desorbing ETU, and eluting ETU from aluminum oxide with chloroform containing ethanol. ETU is converted to the S-butyl derivative for gas-liquid chromatography (GLC) and flame photometric detection (sulfur mode). For liquid chromatography (LC), ETU is cleaned up on another aluminum oxide column and injected directly. LC and GLC results are confirmed by thin layer chromatography. A cooking procedure based on conversion of EBDCs to ETU is included for surveying crops for possible EBDC content. Recoveries from 8 crops and milk fortified at 0.05 ppm ETU ranged from 73 to 100%.

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