Abstract
A laboratory-designed flame photometric detector (FPD) using quartz surface-induced luminescence was used for the on-column capillarychromatographic determination of organotin and organogermanium compounds. The detector response depend on gas flow-rates, detector temperature and the operation mode. The linear range is up to four orders of magnitude for oganotin and up to three orders of magnitude for oganogermanium compounds. The minimum detectable amounts, defined as the signal equal to three times the standard deviation (3σ) of the baseline noise, vary with the species detected and range from 0.7 to 2.3 pg for ethylated butyl- and phenyltin species and from 50 to 100 pg for pentylaed dimethyl-, trimethyl- and tetrabutylgermanium. The determination of butyltin compounds in water and sediments was evaluated in comparison with a GC-AAS system. The proposed method is simple, highly sensitive and reproducible.
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