Gas chromatographic determination of calcium stearate in polyethylene food packaging sheets

1988 ◽  
Vol 447 (3) ◽  
pp. 198-201 ◽  
Author(s):  
S Tan
Keyword(s):  
Food Packaging ◽  
Chromatographic Determination ◽  
Calcium Stearate

Liquid Chromatographic Determination of Residual Styrene in Polystyrene Food Packaging

1981 ◽  
Vol 64 (3) ◽  
pp. 647-652
Author(s):  
Sandra L Varner ◽  
Charles V Breder
Keyword(s):  
Mobile Phase ◽  
Food Packaging ◽  
Chromatographic Determination ◽  
Reverse Phase ◽  
Liquid Chromatographic Method ◽  
Liquid Chromatographic Determination ◽  
Phase Liquid ◽  
Liquid Chromatographic ◽  
Plastic Containers

Abstract The determination of residual styrene in polystyrene food packaging polymers by a reverse phase liquid chromatographic method is described. The polymer is dissolved in tetrahydrofuran and then reprecipitated with methanol. The filtered solution is chromatographed by using an aqueous tetrahydrofuran mobile phase, and the styrene is detected and quantitated by ultraviolet at 254 nm. The detection limit for the method is about 0.5 ppm styrene on a solution basis and 20 ppm in the polymer. The average recovery of styrene from spiked polymer (about 50–3700 ppm) is 88%. Apparent residual styrene was determined in several commercial products, including rigid polystyrene cups, flexible plastic containers, and several foam products. The monomer levels ranged from about 60 to 2250 ppm.

High-performance thin-layer chromatographic determination of rosiglitazone in its dosage form

2002 ◽  
Vol 15 (3) ◽  
pp. 192-195 ◽  
Author(s):  
Ramesh Sane ◽  
Mary Francis ◽  
Atul Moghe ◽  
Sachin Khedkar ◽  
Ajit Anerao
Keyword(s):  
Thin Layer ◽  
High Performance ◽  
Dosage Form ◽  
Chromatographic Determination

Overpressured-layer chromatographic determination of ascorbigen (bound vitamin C) inBrassicavegetables

2004 ◽  
Vol 17 (5) ◽  
pp. 360-364 ◽  
Author(s):  
György Kátay ◽  
Zsolt Németh ◽  
Szilárd Szani ◽  
Oszkár Köck ◽  
Levente Albert ◽  
...  
Keyword(s):  
Vitamin C ◽  
Chromatographic Determination
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