Design and application of a novel integrated electrochemical hydride generation cell for the determination of arsenic in seaweeds by atomic fluorescence spectrometry.

摘要: Abstract An integrated electrochemical hydride generation cell, mainly composed of three components (a gas liquid separator, a graphite tube cathode and reticulate Pt wire anode), was laboratory constructed employed for the detection arsenic by coupling to atomic fluorescence spectrometry. This cell free ion-exchange membrane individual anolyte, with virtues low-cost, easy assembly environmental-friendly. Using flow injection mode, sample throughput could come 120 h−1 attributed small dimension chamber. The operating conditions were investigated in detail potential interferences from oxygen or various ions also evaluated. Under optimized conditions, no obvious quenching effects observed. limit As (III) blank solution 0.2 ng mL−1 (3σ) relative standard deviation 3.1% nine consecutive measurements 5 ng mL−1 solution. calibration curve linear up 100 ng mL−1. accuracy method verified determination reference materials GBW08517 (Laminaria Japonica Aresch) GBW10023 (Porphyra crispata) developed successfully applied determine trace amounts edible seaweeds.