文献类型：期刊文献

英文题名：Simultaneous enrichment & on-line detection of low-concentration Copper, Cobalt, & Nickel Ions in Water by Near-Infrared diffuse reflectance spectroscopy combined with chemometrics

作者：Iqbal, Jibran[1]; Du, Yiping[2]; Howari, Fares[1]; Bataineh, Mahmoud[3]; Muhammad, Nawshad[4]; Rahim, Abdur[4]

机构：[1] College of Natural and Health Sciences, Zayed University, Abu Dhabi, United Arab Emirates; [2] Shanghai Key Laboratory of Functional Materials Chemistry, East China University of Science and Technology, Research Center of Analysis and Test, Meilong Rd 130, Shanghai, 200237, China; [3] University College, Zayed University, Abu Dhabi, United Arab Emirates; [4] Interdisciplinary Research Centre in Biomedical Materials, COMSATS Institute of Information Technology, Lahore, 54000, Pakistan

年份：2017

卷号：100

期号：2

起止页码：560

外文期刊名：Journal of AOAC International

收录：EI(收录号：20171003417781)

语种：英文

外文关键词：Copper - Mean square error - Cobalt - Heavy metals - Metal ions - Nickel - Least squares approximations - Errors - Reflection - Infrared devices - Trace elements

摘要：Sensitive detection of heavy metal ions in water is of great importance considering the effects that heavy metals have on public health. A developed fluidized bed enrichment technique was used to concentrate and detect low concentrations of Cu2+, Co2+, and Ni2+ in water samples by near-IR diffuse reflectance (NIDR) spectroscopy (NIDRS) directly without using any chemicals or reagents. The NIDR spectra of adsorbent were measured on-line, and quantitative detection was achieved by applying a built partial least-squares chemometric model. Sensitivity and accuracy was improved significantly because large-volume mixture solutions were used in the enrichment process. Root mean square error of cross-validation values for Cu2+, Co2+, and Ni2+ were 0.29, 0.41, and 0.35 μg/mL, respectively, with mean relative error values in the acceptable range of 6.56-10.27%. This study confirms the potential application of fluidized bed enrichment combined with NIDRS and chemometrics for the simultaneous detection of trace heavy metal ions in water, with low relative error.