Maroof F B, Hadi D A, Khan A H, Chowdhury A H
Sci Total Environ. 1986 Sep;53(3):233-8. doi: 10.1016/0048-9697(86)90135-x.
The cadmium concentration in different drinking water supplies of Dhaka City is reported. In this study, cadmium was extracted from water into chloroform after chelation with sodium diethyldithiocarbamate and then back extracted into water for determination by atomic absorption spectrophotometry (AAS). The concentration of cadmium in source water is below the detection limit (51 micrograms l-1) and that in supply water (tap water) and tube-well water ranges from 1.03 to 1.58 and 1.71 to 2.24 ppb, respectively. The corresponding zinc content ranges from 0.013 to 0.30, 0.018 to 3.8 and 0.042 to 0.37 ppm. The implications of these findings are discussed.
报道了达卡市不同饮用水供应中的镉浓度。在本研究中，镉与二乙基二硫代氨基甲酸钠螯合后从水中萃取到氯仿中，然后再反萃取到水中，通过原子吸收分光光度法（AAS）进行测定。源水中镉的浓度低于检测限（51微克/升），供应水（自来水）和管井水的镉浓度分别为1.03至1.58 ppb和1.71至2.24 ppb。相应的锌含量范围为0.013至0.30 ppm、0.018至3.8 ppm和0.042至0.37 ppm。讨论了这些发现的意义。
