我厂使用的铜磷银合金,铜为基体,含磷7%左右,含银在2%～5%之间,杂质元素主要有铁、锡、铅、镉、镍、锑、锌、铋、砷等.银的含量影响着该合金的物理性能和价值,测定银的含量很有必要.经试验,不分离出银,在硝酸、柠檬酸和酒石酸介质中,用直接火焰原子吸收光谱法测定银,方法简便,精密度和准确度满足分析要求.1 试剂与仪器混合酶溶液:柠檬酸5g和酒石酸5g溶于约200ml去离子水中,加入优级纯硝酸20ml,移入1L量瓶中,稀释至刻度.储存于塑料瓶中. The copper, phosphorus and silver alloy used in our factory are mainly made of copper with a content of about 7% phosphorus and between 2% and 5% silver. The main impurity elements are iron, tin, lead, cadmium, nickel, antimony, zinc, bismuth, Arsenic, etc. The content of silver affects the physical properties and the value of the alloy, and it is necessary to determine the content of silver.After the test, no silver was separated and determined by direct flame atomic absorption spectrometry in nitric acid, citric acid and tartaric acid medium Silver, the method is simple, precision and accuracy to meet the analysis requirements .1 reagent and equipment mixed enzyme solution: citric acid 5g and tartaric acid 5g dissolved in about 200ml deionized water, adding superior grade pure nitric acid 20ml, into 1L volumetric flask, diluted To scale. Store in plastic bottle.