Application of Soluble Membrane Filter in Simultaneous Determination of Trace Levels of Cadmium, Copper, Lead and Zinc in Food Additives by Inductively Coupled Plasma Atomic Emission Spectrometry

Abstract

A method for simultaneous determination of trace levels of Cd(II), Cu(II), Pb(II) and Zn(II) in food additives by inductively coupled plasma atomic emission spectrometry ( ICP–AES ) after soluble membrane filter pre-concentration was developed. Based on collection of the chelates of metal ions(II) with 2-(5-bromo-2-pyridylazo)-5- diethylaminophenol ( 5-Br-PADAP ) on soluble membrane filter, the analyte ions were pre-concentrated and separated from sample matrix solutions. Multi-channel membrane filter device and soluble mixed cellulose ester membrane were selected. Analytical parameters such as pH, amount of 5-Br-PADAP, sample volume, etc. were optimized. Under the matrix of Na+, K+ and Mg2+, the limits of detection were 0.02 – 0.03, 0.14 – 0.23, 0.31 – 0.53, 0.10 – 0.15 μg L-1 for Cd(II), Cu(II), Pb(II) and Zn(II) respectively. The developed method was successfully applied to sodium benzoate, potassium sorbate and basic magnesium carbonate with spiked recoveries of 94% – 115%. Some sample analysis results were checked by inductively coupled plasma mass spectrometry ( ICP–MS ) directly.

Simultaneous spectrophotometric determination of copper, cobalt, nickel and iron in foodstuffs and vegetables with a new bis thiosemicarbazone ligand using chemometric approaches

“…Different analytical techniques such as atomic absorption spectrometry (Aleixo & Nóbrega, 2003;Citak, Tuzen, & Soylak, 2009;Kiliç, Acar, Ulaşan, & Ilim, 2002;Turkekul, Elmastas, & Tüzen, 2004;Vinas, Pardo-Martinez, & Hernández-Córdoba, 2000), inductively coupled plasma optical emission spectrometry (Sarma, Kumar, Reddy, & Reddy, 2005; Türkmen, Türkmen, Tepe, Ateş, & Gökkuş, 2008;Zhu, Chen, Wei, Jin, & Chen, 2011), atomic absorption spectrometry (Neves, Moraes, Saleh, Loureiro, Silva, Barros, et al, 2009), chromatography (Ichinoki, Hongo, & Yamazaki, 1987;Senyuva, Sarica, & Ozden, 2002;Yang, Jiang, & Sahayam, 2014), electrophoresis (Feng, Wang, & Fong Yau Li, 2003), voltammetry (Díaz, Guiberteau, Lopez Soto, & Ortiz, 2006;Galeano Díaz, Guiberteau, López Soto, & Ortiz, 2003;Kassem & Amin, 2013;Sancho, Debán, Campos, Pardo, & Vega, 2000), spectrophotometry (Abbasi-Tarighat, 2014;Abbasi-Tarighat & Afkhami, 2012;Abbasi-Tarighat, Mohammadizadeh, & Abdi, 2013;Abbasi-Tarighat, Shahbazi, & Niknam, 2013;Afkhami, Abbasi-Tarighat, & Khanmohammadi, 2009;Alula, Mohamed, & Bekhit, 2010;Citak, Tuzen, & Soylak, 2009) and spectrofluorimetry (Li, Yang, Zhou, & Ha, 2003;Qiu-e, Yunkun, Xingguo, Zhide, & Qiheng, 1999) have been reported for determination of copper, cobalt, nickel and iron ions in foods and pharmaceutical samples, individually or simultaneously.…”