Simultaneous determination of copper and zinc in brass samples by PCR and PLS1 methods using a multiple ion-selective electrode array

• Published in: Talanta (Oxford) 2018-06, Vol.183, p.184-191
• Main Authors: Eylem, Cemil Can, Taştekin, Mustafa, Kenar, Adnan
• Format: Article
• Language: English
• Subjects: Brass samples; Chemometrics; Copper and zinc determination; Multiple ion-selective electrode array; Multivariate calibration techniques; Partial least squares regression method (PLS1); Principal component regression (PCR)
• ISSN: 0039-9140; 1873-3573
• DOI: 10.1016/j.talanta.2018.02.067

A method was developed to determine copper and zinc simultaneously in brass sample using a multiple ion-selective electrode array system and multivariate calibration techniques. The multiple ion-selective electrode array system was consisted of one pH electrode and eight ion selective electrodes which were formed using commercial ionophores and which are mainly sensitive copper and zinc. PCR, PLS1 which are multivariate calibration techniques were used to calibrate the multiple ion-selective electrode array system using five level multivariate calibration design and PCR method was selected as most suitable method. The measurements were performed at pH 10 in ammonia-ammonium chloride buffer. Copper and zinc content of a brass sample were determined by the calibrated multiple ion-selective electrode array system and the composition of brass sample was also determined by gravimetric method. The percentage amount of copper and zinc in brass sample were 64 ± 1 and 26 ± 2, respectively using the gravimetric method. The percentage results obtained in brass samples for copper and zinc were 63 ± 3 and 24 ± 3 by PCR method and 60 ± 5 and 20 ± 7 by PLS1 method, respectively. The obtained results were calculated for a 95% confidence level. [Display omitted] •Improper disposition of WEEE containing hazardous substances such as copper and zinc have serious negative effects on the environment.•Ion selective electrodes find a wide range of applications in clinical research, environmental monitoring, and many other areas.•Many chemical species may coexist in an analysis solution and may cause erroneous results due to their interference with the analyte.•In the last few decades, there has been attempts to overcome these problems utilizing newly developed sensors called electronic or artificial tongue in combination with multiple calibration techniques.