【摘要】 研究萃取光度法测定痕量Ｃｄ的最佳实验条件，结果表明，λｍａｘ＝５１２ｎｍ，ε＝２．４２×１０６Ｌｍｏｌ－１ｃｍ－１，相对标准偏差为２．６％（自来水）和３．１％（河水）．水样中Ｃｄ的含量在０—１μｇ／２５ｍｌ范围内服从比尔定律．应用于自来水及河水中Ｃｄ的测定，结果令人满意．更多还原

【Abstract】 Experimental results showed that λmax=512nm,ε=242×106L·mol-1·cm-1;the relative standard deviation is 2.6% and 31% for tap water and river water;Beer’s law is obyed in the range of 0—1μg/25ml for cadmium in water and cadmium in tap water and river water was determined with satisfactory results.更多还原