![]() ![]() Due to the tremendous applications their exposure to environment and thereby in food cycle is obvious. Uses of mercury as fungicides, pesticides, etc., also add mercury to the environment 1, 2, 7. The chief sources of mercury pollution are chlor-alkali plants, paper, pulp, cellulose and plastic industries, electrical, paint, pharmaceutical industries, etc. Mercury can be inhaled and absorbed through the skin and mucous membranes. It causes many harmful disease when intake by human body 1, 2. Mercury is a heavy metal which is much toxic for human health. It is used as a preservative in laboratory reagents and related chemicals. Mercury and its compounds are used in medicine. Although both zinc and copper are the essential micronutrients and are required by the body in very small amounts, excess in the human body can cause stomach and intestinal distress such as nausea, vomiting, diarrhea, and stomach cramps. Zinc dithiocarbamate complexes are used as agricultural fungicides 6. Zinc ensures a healthy immune system and takes part in DNA synthesis as well 5. Zinc is most commonly used as an anti-corrosion agent, galvanization as an anode material for batteries as a substitute for the traditional lead/tin alloy in pipes, in the automotive, electrical, and hardware industries 3, 4. Copper is required for normal metabolic processes 1, 2. By the biological cycle, some of them through the food chain pass into plants, animals, and man, thus affecting them negatively.Ĭopper is one of the important and essential nutrients for human health as well as the growth of animals and plants. Due to corrosion and geological factors some metal ions in complex form being environmental contaminants could also be present in drinking waters and natural water bodies and thereby to the soil. 371/P&D/7-28/2012(part 3) dated Ĭompeting interestNo conflict of interest.ĭonation massageAny support would be highly appreciated for our further research.ĪddressDepartment of chemistry, University of Chittagong, BangladeshĮ-mail If you want to contact author,Please register as a member.Ī variety of metals could enter industrial wastewaters as a result of anthropogenic activity. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs 2.1 Japan (CC BY-NC-ND 2.1 JP) License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.įundingThis research is partially funded by University Grant Commission (UGC, Bangladesh) under University Revenue Budget Scheme. Science Postprint is published by General Healthcare Inc. ![]() Keywords Metal substitution, spectrophotometric determination, nontranstion elements, environmental sample, fractional extractionġ) Department of chemistry, University of Chittagong, BangladeshĬitationUddin MN, Shah NM, Islam M, Hossain MA (2014) Spectrophotometric determination of non-transition elements (Zn Hg) in environmental sample by the metal substitution after fractional extraction. The LOD and LOQ were found to be 0.029 μg mL -1 and 0.098 μg mL -1 respectively for both zinc and mercury determination. Proposed method has been optimized, validated and applied to the environmental samples for their simultaneous determination. Therefore, based on this substitution spectrophotometric method has been proposed for the determination of Zn(II), Hg(II) by the measurement of Cu(DDTC) 2. The subsequent increase or decrease in absorption is equivalent to the amount of zinc or mercury, respectively. Hence from Zn(DDTC) 2 zinc is substituted with the addition of excess copper, and from Cu(DDTC) 2 copper is substituted with the addition of mercury. Again the stability of DDTC complexes is varied as the metal sequence of Hg> Cu> Zn. Though DDTC complex of Cu(II) shows maximum absorption at 435 nm but that of Hg(II) and Zn(II), being non-transition elements with d 10 electronic system, shows no absorption in the same region. Diethyldithiocarbamate (DDTC), the common reagent used for spectrophotometric determination, forms M(DDTC) 2 complexes (M = Cu, Zn, Hg) that are soluble in organic solvents like CHCl 3 or CCl 4. ![]()
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