海水是高浓度的碱金属、碱土金属氯化物复杂成份体系,其中的铜、铅、镉含量甚微。大量的碱金属和碱土金属干扰测定。将海水样品通过巯基棉,可将其中的铜、铅、镉同时定量吸附下来而与海水中高浓度的K~+,Na~+,Ca~(2+),Mg~(2+)等离子分离开。再用10毫升5%热盐酸淋洗,使被巯基棉吸附 Seawater is a high concentration of alkali, alkaline earth metal chloride complex system of ingredients, including copper, lead, cadmium content is minimal. A large number of alkali and alkaline earth metal interference determination. Seawater samples can be separated from K +, Na ~ +, Ca ~ (2+) and Mg ~ (2+) ions in seawater by simultaneously adsorbing copper, lead and cadmium simultaneously through thiol cotton. . Rinse again with 10 ml of 5% hot hydrochloric acid to make it adsorbed by thiol cotton