Determination of aspartame and its breakdown products in soft drinks by reverse-phase chromatography with UV detection

1985 ◽  
Vol 33 (4) ◽  
pp. 734-738 ◽  
Author(s):  
Wing Sum Tsang ◽  
Margaret A. Clarke ◽  
Frederick W. Parrish
Keyword(s):  
Soft Drinks ◽  
Uv Detection ◽  
Reverse Phase ◽  
Reverse Phase Chromatography

Liquid Chromatographic Determination of Methiocarb in Technical and Formulated Products: Collaborative Study

1984 ◽  
Vol 67 (3) ◽  
pp. 492-493
Author(s):  
Stephen C Slahck ◽  
◽  
A A Carlstrom ◽  
L T Chenery ◽  
N D Ellis ◽  
...  
Keyword(s):  
Coefficient Of Variation ◽  
Collaborative Study ◽  
Internal Standard ◽  
Chromatographic Determination ◽  
Reverse Phase ◽  
Reverse Phase Chromatography ◽  
Wettable Powder ◽  
Liquid Chromatographic Determination ◽  
Liquid Chromatographic

Abstract An LC method for the determination of methiocarb in methiocarb technical and formulated products has been subjected to a collaborative study with 9 participating collaborators. Formulations are extracted with acetonitrile and analyzed by reverse phase chromatography, with acetophenone as an internal standard. Collaborators were furnished samples of technical, 75% wettable powder, 75% seed treater, 75% concentrate, and 50% hopper box treater. Coefficient of variation values obtained on the 5 samples were 0.71, 0.83, 0.62, 1.57, and 0.82%, respectively. The method has been adopted official first action.

Extraction of Organic Acids by Ion-Pair Formation with Tri-n-Octylamine. Part V. Simultaneous Determination of Synthetic Dyes, Benzoic Acid, Sorbic Acid, and Saccharin in Soft Drinks and Lemonade Syrups

1984 ◽  
Vol 67 (5) ◽  
pp. 880-885 ◽  
Author(s):  
Marc L Puttemans ◽  
Louis Dryon ◽  
Désiré L Massart
Keyword(s):  
Benzoic Acid ◽  
Sorbic Acid ◽  
Sodium Perchlorate ◽  
Soft Drinks ◽  
Synthetic Dyes ◽  
Chromatographic System ◽  
Reverse Phase ◽  
Phase Liquid ◽  
Liquid Chromatographic

Abstract Synthetic dyes, benzoic acid, sorbic acid, and saccharin are extracted simultaneously from soft drinks with 0.01M tri-n-octylamine at pH = 5.5 and are back-extracted to an aqueous phase with 0.1M sodium perchlorate. The perchlorate solution is injected directly into the reverse phase liquid chromatographic system which permits the separation of all the substances investigated. Forty-six commercial samples of soft drinks and 11 lemonade syrups were analyzed. All samples conformed to the legal prescriptions.

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