title: Studies on exposure status of inhabitants to water-arsenic valence states in areas with endemic arsenism in the Datong basin in Shanxi.
abstract: This study aimed to describe the distribution of water-arsenic (As) valence states and its relationship to areas with endemic arsenism in the Datong basin. Drinking water samples of patients with endemic arsenism and a control group were examined using hydride generation atomic fluorescence spectrometry (HG-AFS). We analyzed the data using SPSS10.0 for Windows. The As(III)/As ratio was 52.1% in the water sample, exceeding the national standard of 0.05 mg/L. The As(III)/As ratio significantly varied among the different stages in the disease-state groups, and with the control group (χ (2) = 22.4, P<0.01). The As(III)/As(V) ratio significantly varied in the four groups (χ (2) = 26.19, P<0.01), with a tendency to increase along with the seriousness of the disease state. The most common type of drinking water arsenic valence state was As(III) in the endemic disease-areas. Endemic arsenism was positively correlated with As(III). This led us to conclude that the fraction of each water-arsenic valence state should be studied when determining the arsenic content of drinking water.
authors.affiliation: Institute for Prevention and Treatment of Endemic Disease of Shanxi Province, Linfen, 041000, China, lijun19932000@163.com.
authors.forename: Jun
authors.initials: J
authors.lastname: Li
authors.forename: Xiaotian
authors.initials: X
authors.lastname: Cheng
authors.forename: Zhenghui
authors.initials: Z
authors.lastname: Wang
authors.forename: Xinping
authors.initials: X
authors.lastname: Wen
authors.forename: Lingling
authors.initials: L
authors.lastname: Han
authors.forename: Zhiping
authors.initials: Z
authors.lastname: Sang
authors.forename: Jie
authors.initials: J
authors.lastname: Zhang
authors.forename: Hushun
authors.initials: H
authors.lastname: Duan
authors.forename: Binfeng
authors.initials: B
authors.lastname: Liang
authors.forename: Jianguo
authors.initials: J
authors.lastname: Gao