PMID- 27941912 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20180522 LR - 20210323 IS - 2045-2322 (Electronic) IS - 2045-2322 (Linking) VI - 6 DP - 2016 Dec 12 TI - Quantitative determination and toxicity evaluation of 2,4-dichlorophenol using poly(eosin Y)/hydroxylated multi-walled carbon nanotubes modified electrode. PG - 38657 LID - 10.1038/srep38657 [doi] LID - 38657 AB - This study aimed at developing simple, sensitive and rapid electrochemical approach to quantitatively determine and assess the toxicity of 2,4-dichlorophenol (2,4-DCP), a priority pollutant and has potential risk to public health through a novel poly(eosin Y, EY)/hydroxylated multi-walled carbon nanotubes composite modified electrode (PEY/MWNTs-OH/GCE). The distinct feature of this easy-fabricated electrode was the synergistic coupling effect between EY and MWNTs-OH that enabled a high electrocatalytic activity to 2,4-DCP. Under optimum conditions, the oxidation peak current enhanced linearly with concentration increasing from 0.005 to 0.1 muM and 0.2 to 40.0 muM, and revealed the detection limit of 1.5 nM. Moreover, the PEY/MWNTs-OH/GCE exhibited excellent electrocatalytic activity toward intracellular electroactive species. Two sensitive electrochemical signals ascribed to guanine/xanthine and adenine/hypoxanthine in human hepatoma (HepG2) cells were detected simultaneously. The sensor was successfully applied to evaluate the toxicity of 2,4-DCP to HepG2 cells. The IC(50) values based on the two electrochemical signals are 201.07 and 252.83 muM, respectively. This study established a sensitive platform for the comprehensive evaluation of 2,4-DCP and posed a great potential to simplify environmental toxicity monitoring. FAU - Zhu, Xiaolin AU - Zhu X AD - School of Environment, Northeast Normal University, Changchun 130117, P.R. China. FAU - Zhang, Kexin AU - Zhang K AD - School of Environment, Northeast Normal University, Changchun 130117, P.R. China. FAU - Wang, Chengzhi AU - Wang C AD - School of Environment, Northeast Normal University, Changchun 130117, P.R. China. FAU - Guan, Jiunian AU - Guan J AD - School of Environment, Northeast Normal University, Changchun 130117, P.R. China. FAU - Yuan, Xing AU - Yuan X AD - School of Environment, Northeast Normal University, Changchun 130117, P.R. China. FAU - Li, Baikun AU - Li B AD - Department of Civil and Environmental Engineering, University of Connecticut, Storrs, CT 06269, USA. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20161212 PL - England TA - Sci Rep JT - Scientific reports JID - 101563288 EIN - Sci Rep. 2021 Mar 9;11(1):5864. PMID: 33750852 PMC - PMC5150580 EDAT- 2016/12/13 06:00 MHDA- 2016/12/13 06:01 PMCR- 2016/12/12 CRDT- 2016/12/13 06:00 PHST- 2016/09/07 00:00 [received] PHST- 2016/11/10 00:00 [accepted] PHST- 2016/12/13 06:00 [entrez] PHST- 2016/12/13 06:00 [pubmed] PHST- 2016/12/13 06:01 [medline] PHST- 2016/12/12 00:00 [pmc-release] AID - srep38657 [pii] AID - 10.1038/srep38657 [doi] PST - epublish SO - Sci Rep. 2016 Dec 12;6:38657. doi: 10.1038/srep38657.