Increasing the accuracy of determination of nc/nH ratios by gas chromatography-atomic emission detection.
The influence of oxygen content in helium on the accuracy of nc/nH ratio determination for model mixtures of aliphatic and polyaromatic hydrocarbons and polychlorinated biphenyls was studied. The best accuracy was achieved at the oxygen content ca. 9%, which was the maximal possible oxygen content in helium for this GC-atomic emission detection (helium flow rate was 25 ml min(-1)). Using the maximal oxygen flow in plasma the nC/nH ratio determination accuracy improvement was accompanied by 10-fold increase in detection limit.
Chernetsova
Elena S
ES
Analytical Chemistry Division, Chemistry Department, Moscow State University, Leninskie Gory 1 Building 3, 119992 Moscow, Russian Federation. chernetsova@environment.chem.msn.ru
Revelsky
Alexander I
AI
Durst
Dupont
D
Sobolevsky
Tim G
TG
Revelsky
Igor A
IA
D000473:Alkanes / Q000032:analysis; D002849:Chromatography, Gas / Q000379:methods*; D006371:Helium / Q000737:chemistry; D006838:Hydrocarbons / Q000032:analysis*; D010100:Oxygen / Q000737:chemistry; D011078:Polychlorinated Biphenyls / Q000032:analysis*; D012015:Reference Standards; D012680:Sensitivity and Specificity; D013054:Spectrophotometry, Atomic / Q000379:methods*
D000473:Alkanes; D006838:Hydrocarbons; D006371:Helium; C094074:tridecane; D011078:Polychlorinated Biphenyls; D010100:Oxygen