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Akrami, A., Niazi, A., Bagheban-Shahri, F. (2018). Determination of Trace Amounts of Gold in Environmental Samples by Adsorptive Stripping Voltammetry of Its Complex with Rhodamine Using Osc-Pls. Journal of Chemical Health Risks, 2(3), -. doi: 10.22034/jchr.2018.544004
A. Akrami; A. Niazi; F. Bagheban-Shahri. "Determination of Trace Amounts of Gold in Environmental Samples by Adsorptive Stripping Voltammetry of Its Complex with Rhodamine Using Osc-Pls". Journal of Chemical Health Risks, 2, 3, 2018, -. doi: 10.22034/jchr.2018.544004
Akrami, A., Niazi, A., Bagheban-Shahri, F. (2018). 'Determination of Trace Amounts of Gold in Environmental Samples by Adsorptive Stripping Voltammetry of Its Complex with Rhodamine Using Osc-Pls', Journal of Chemical Health Risks, 2(3), pp. -. doi: 10.22034/jchr.2018.544004
Akrami, A., Niazi, A., Bagheban-Shahri, F. Determination of Trace Amounts of Gold in Environmental Samples by Adsorptive Stripping Voltammetry of Its Complex with Rhodamine Using Osc-Pls. Journal of Chemical Health Risks, 2018; 2(3): -. doi: 10.22034/jchr.2018.544004

Determination of Trace Amounts of Gold in Environmental Samples by Adsorptive Stripping Voltammetry of Its Complex with Rhodamine Using Osc-Pls

Article 8, Volume 2, Issue 3, Autumn 2012  XML PDF (238.14 K)
DOI: 10.22034/jchr.2018.544004
Authors
A. Akrami email ; A. Niazi; F. Bagheban-Shahri
Receive Date: 08 January 2013,  Revise Date: 20 June 2019,  Accept Date: 29 October 2018 
Abstract
The multivariate calibration method was applied for the determination of trace amounts of gold based on a hanging mercury drop electrode (HMDE) in the presence of rhodanine, followed by reduction of adsorbed gold by voltammetric scan using differential pulse modulation The optimum experimental conditions are: rhodanine concentration of 0.20 mg mL-1, pH 5.0, accumulation potential of -600 mV versus Ag/AgCl, accumulation time of 100 sec, scan rate of 30 mV s-1 and pulse height of 100 mV. The calibration matrix for partial least squares (PLS) regression was designed with 9 samples. Orthogonal signal correction (OSC) is a preprocessing technique used for removing the information unrelated to the target variables based on constrained principal component analysis. OSC is a suitable preprocessing method for PLS calibration without loss of prediction capacity using electrochemical method. The RMSEP for gold determination with PLS and OSC-PLS were 8.51 and 1.94, respectively. This procedure allows the determination of gold in synthetic and real samples with good reliability of the determination. 
Keywords
Gold; Determination; Stripping; Voltammetric; PLS; OSC
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