Determination of inorganic selenium species [Se(IV) and Se(VI)] in tube well water samples in Punjab, India

Development of anion-exchange high-performance liquid chromatography-inductively coupled plasma mass spectrometry methods for the speciation analysis of inorganic selenium and iodine in groundwater

“…Although many selenium and iodine speciation methods based on HPLC-ICP-MS have been reported, none of the reported technique achieved the simultaneous separation and detection of selenium and iodine. Among the speciation studies of selenium or iodine in saline or mineralized water reported by other authors, the LODs for selenite and selenate ranged from 0.2 mg L À1 to 0.35 mg L À1 and from 0.35 mg L À1 to 0.8 mg L À1 , respectively, 25,28,31,32 and the LODs for iodide and iodate ranged from 0.025 mg L À1 to 0.052 mg L À1 and from 0.25 mg L À1 to 0.061 mg L À1 , respectively. 16,22,33 We concluded that the proposed method improved the detection limits by one order of magnitude for selenium and iodine species and allowed for the simultaneous determination of selenium and iodine.…”

“…The use of HPLC-ICP-MS for iodine speciation analysis has been limited primarily to marine samples, such as seawater and seaweed, 14,[16][17][18] whereas that for selenium species has been limited mainly to food [19][20][21] and biological samples. [22][23][24] Only a few selenium or iodine speciation studies have been reported with regard to groundwater, 25,26 and the literature contains no reports of the application of HPLC-ICP-MS to the simultaneous speciation analysis of inorganic selenium and iodine species.…”

Mass Spectrometry in India

“…Selenium species [Se(IV) and Se(VI)] were estimated in tube-well water samples by ion chromatography coupled with ICP-MS and also by a UV-assisted vapor generation combined with a sensitive "collect and punch"-ICP-MS method. Similarly, the possibility of using moss (Funaria hygrometrica), immobilized in a polysilicate matrix as the substrate for speciation of Cr(III) and Cr(VI) in various water samples was studied by using ICP-MS. [376][377][378][379][380][381][382][383][384][385][386][387][388][389][390] The "collect and punch" cold vapor ICP-MS method was also developed for the direct determination of mercury at nanograms per liter levels. 391 An ultrasound-assisted extraction procedure for the fast estimation of major, minor and trace elements in lichen and mussel samples was developed and ICP-MS was used to estimate elements such as Na, K, Ca, Mg, Cr, Mn, Co, Ni, Cu, Zn, Ge, As, Se, Rb, Sr, Zr, Ag, Cd, In, Sb, Cs, Ba, Pb and Bi.…”

Selenium and Zinc Levels in Well Water in Sanliurfa and Vicinity

“…Dünyada yer altı su kaynaklarında ağır metal kirlili ğinin belirlenmesine yönelik bir çok çalışma bulun maktadır; selenyum düzeyleri Amerika Birleşik Devletleri'nde 400-9.000 µg/l 16 , Finlandiya'da 50-1.000 µg/L 23 , Hindistan'da yapılan 80 kuyu suyu örneğine dayanan bir çalışmada 13 , 0.01 mg/l üzerinde bildiri lirken; bir diğer çalışmada da (14) Se (IV) 0.3 µg/l ve Se (VI) 0.8 µg/l, olarak tespit edilmiştir. Güney Teksas'ta sulama amaçlı kullanılan 112 kuyu suyu örneğinin %5'inde içme suyu için (50 µg/l), %21'inde ise sulama suları için (20 µg Selenyum gıdaların çoğunda doğal olarak bulunan, canlıların üreme ve büyümeleri için gerekli olan bir maddedir; evcil hayvanlardaki birçok dejeneratif hastalığın önlenmesi ve sağaltımında etkilidir.…”