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论文类型： 期刊论文

发表时间： 2017-12-28

发表刊物： NANOSCALE

收录刊物： SCIE、EI、PubMed

卷号： 9

期号： 48

页面范围： 19139-19144

ISSN号： 2040-3364

摘要： In this work, an N-T/gold nanoparticle system was assembled for the convenient and colorimetric identification of Cr based on its coordination chemistry with the thymine derivative (N-T). In addition to the visible colorimetric changes for the qualitative Cr identification, the A(630 nm/520) (nm) values changed linearly with Cr concentration over a range of 0.5-2.5 mu M and the detection limits reached 0.03 mu M and 0.07 mu M for Cr3+ and Cr2O72-, respectively, both of which satisfied the Cr water quality standards of the U.S. EPA, WHO and China. Furthermore, a more convenient method was developed for quantitative determination of Cr concentrations in practical samples based on the Eyedropper function in Microsoft's PowerPoint software, wherein the RGB (red, green and blue) value of the sample could be easily screened in the colorimetric card for a more accurate result with good recovery, avoiding complicated instrumentation.