Determination of trace amounts of carcinogenic substances: adsorptive stripping voltammetry of 1-[4′-(phenylazo)phenyl]-3,3-dimethyltriazene at a hanging mercury drop electrode

The Analyst ◽  
1992 ◽  
Vol 117 (4) ◽  
pp. 751-755 ◽  
Author(s):  
Jiří Barek ◽  
Arnold G. Fogg
2001 ◽  
Vol 137 (3-4) ◽  
pp. 215-220 ◽  
Author(s):  
Mohamed S. Ibrahim ◽  
Mohamed S. El-Maazawi ◽  
Khaled M. Al-Magboul ◽  
Moustafa M. Kamal

The Analyst ◽  
1993 ◽  
Vol 118 (11) ◽  
pp. 1405-1410 ◽  
Author(s):  
María Pedrero ◽  
Victoria Calvo ◽  
F. Javier Manuel de Villena ◽  
Jose M. Pingarrón ◽  
Luis M. Polo

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
Dariusz Guziejewski ◽  
Agnieszka Nosal-Wiercińska ◽  
Sławomira Skrzypek ◽  
Witold Ciesielski ◽  
Sylwia Smarzewska

The aim of the research was the use of square wave adsorptive stripping voltammetry (SWAdSV) in conjunction with a hanging mercury drop electrode (HMDE) for the determination of nitrothal-isopropyl. It was found that optimal SW technique parameters were frequency, 200 Hz; amplitude, 50 mV; and step potential, 5 mV. Accumulation time and potential were studied to select the optimal conditions in adsorptive stripping voltammetry: 45 s at 0.0 V, respectively. The calibration curve (SWSV) was linear in the nitrothal-isopropyl concentration range from 2.0 × 10−7 to 2.0 × 10−6 mol L−1 with detection limit of 3.46 × 10−8 mol L−1. The repeatability of the method was determined at a nitrothal-isopropyl concentration level equal to 6.0 × 10−7 mol L−1 and expressed as RSD = 5.5% (n=6). The proposed method was successfully validated by studying the recovery of nitrothal-isopropyl in spiked environmental samples.


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