抄録
The technique of on-line direct precipitation preconcentration by sulfide precipitation for As has been developed and applied to ICP-AES. For 1.0mL of sample, the enrichment factor is 4 with the sampling speed of 15/hr. However, the enrichment factor can be increased to more than 40times when the sampling volume is increased to 10mL with the samplig speed of 5/hr. Analysis of NIST reference material yielded a good result with the certified value.
