半微量分析有节约试剂、降低成本、减少环境污染等优点。虽然对试样粒度,天平,滴定管有一定的要求,但也不是十分严格的。本法虽然粒度达到,但金属分布不均匀的试样是不合适的。本法试验采用灵敏度为万分之一天平,试样粒度为160目,一般二等滴管,所用烧杯体积为100毫升,进行了半微量法测定矿中铜的各条件试验。试验证明在上述条件下,称量为50毫克,其误差不超过常量法误差。在此基础上拟定了碘量法 Semi-micro analysis has the advantages of saving reagents, reducing costs and reducing environmental pollution. Although the sample size, balance, burettes have certain requirements, but not very strict. Although this method to achieve the size, but uneven distribution of metal samples is not appropriate. The test method using a sensitivity of one hundred thousandth balance, the sample size of 160 mesh, the general second-class dropper, the beaker used in the volume of 100 ml, a semi-micro method for the determination of copper mine conditions test. Test proved that in the above conditions, weighing 50 mg, the error does not exceed the constant error. On this basis, Iodometric method was developed