Use of 2-（tert-butoxy）-N-（3-carbamothioylphenyl）acetamide and graphene oxide for separation and preconcentration of Fe（Ⅲ）,Ni（Ⅱ）,Cu（Ⅱ） and Zn（Ⅱ） ions in different samples

• Published in: 中国化学快报：英文版 2014 (5), p.791-793
• Main Author: Mohammad Reza Pourjavid Ali Akbari Sehat Majid Haji Hosseini Mohammad Rezaee Masoud Arabieh Seyed Reza Yousefi Mohammad Reza Jamali
• Format: Article
• Language: English
• Subjects: 丁氧基; 乙酰胺; 分离富集; 氧化物; 氧化石墨; 火焰原子吸收光谱法; 重金属离子
• ISSN: 1001-8417; 1878-5964

A simple and selective method using a column packed with graphene oxide（GO） as a solid phase extractant has been developed for the multi-element preconcentration of Fe（Ⅲ）,Ni（Ⅱ）,Cu（Ⅱ） and Zn（Ⅱ）ions prior to flame atomic absorption spectrometric determinations.The method is based on the sorption of mentioned ions on synthesized GO using 2-（tert-butoxy）-N-（3-carbamothioylphenyl）acetamide as a chelating agent.Several parameters on the extraction and complex formation were optimized.Under the optimized conditions（pH 6,flow rate 9 mL/min）,metal ions were retained on the column,then quantitatively eluted by HNO3solution（5 mL,3.0 mol/L）.The preconcentration factor was calculated as250.The detection limits for the analyte ions of interest were found in the range of 0.11 ng/mL（Ni2＋） to0.63 ng/mL（Cu2＋）.The column packed with GO was adequate for metal ions separation in matrixes containing alkali,alkaline earth,transition and heavy metal ions.