【摘要】 用离子交换比色法,在树脂相于700nm和475nm处直接测定铋的吸光度,除了大量的银(Ⅰ)和铅(Ⅱ)外,其它离子对ppm～ppb数量级的铋的测定没有干扰。该方法可用于测定天然水中的微量铋。更多还原

【Abstract】 The present paper reports the determination of bismuth by ionexchange resin spectrophotometry. The yellow bismuth-iodide complexes were specifically absorbed and concentrated on an anion-exchange resin in the sulphate form. The resin-phase absorbances at 700nm and 475nm were measured directly. Bismuth in the ppb～ppm range can be determined without interference except a large amount of silver(Ⅰ) and lead(Ⅱ). The method is useful for the determination of bismuth in natural water.更多还原