Determination of Cr (VI) in tap water with poly quaternary ammonium salt as a binding phase in diffusive gradients in thin-films

GUO Lian-wen; CHEN Hong; ZHANG Yang-yang; ZHANG Meng-han; ZHANG Han; HE Meng; LI Jian-rong; CHEN Ying; LI Min-zhen

doi:10.13386/j.issn1002-0306.2014.20.006

GUO Lian-wen, CHEN Hong, ZHANG Yang-yang, ZHANG Meng-han, ZHANG Han, HE Meng, LI Jian-rong, CHEN Ying, LI Min-zhen. Determination of Cr (VI) in tap water with poly quaternary ammonium salt as a binding phase in diffusive gradients in thin-films[J]. Science and Technology of Food Industry, 2014, (20): 69-71. DOI: 10.13386/j.issn1002-0306.2014.20.006

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Determination of Cr (VI) in tap water with poly quaternary ammonium salt as a binding phase in diffusive gradients in thin-films

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Cr (VI) in tap water was measured by the diffusive gradients in thin-films (DGT) technique using0.05mol/L poly quaternary ammonium salt (PQAS) solution as binding phase (PQAS DGT) . The recoveries of Cr (VI) in prepared solutions measured by PASP DGT were 93.5%¹02.4% with relative standard deviation (RSD) 2.25%⁴.33%. The concentration of Cr (VI) in tap water measured by PQAS DGT was 2.68³.45g/L with recoveries of 94.7%¹02.6%. The method detect limit for PQAS DGT was 0.065g/L (deployment time 48h) .Therefore, PQAS DGT could be used to measure trace Cr (VI) and gave an early alarm in tap water.

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Determination of Cr (VI) in tap water with poly quaternary ammonium salt as a binding phase in diffusive gradients in thin-films

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