Headspace GC-SCD monitoring of low volatile sulfur compounds during fermentation and in wine

Abstract

Adsorptive accumulation in stripping voltammetry has been applied for trace measurements of the cancerostatic drug actinomycin-C1 (ACT). Accumulation is achieved by controlled adsorption of ACT film on the hanging mercury drop electrode (HMDE). The cathodic stripping response was evaluated with respect to accumulation time, concentration dependence, solution conditions and other variables. The limit of detection after 5 minutes preconcentration is 1 g L -1 (8 l0 -10 M). The effects of possible interferences, due to coexisting metal ions or organic substances, are evaluated. The applicability of the method to the determination of ACT in untreated urine is described.