EDTA对土壤总铬测定的促进作用

Accelerating effect of EDTA in determination of total chromium in soil sample

[目的]探讨国标法土壤总铬测定中促进剂对测定结果的影响。[方法]提出选择EDTA作为促进剂。[结 果]以EDTA为促进剂可使回收率达89%～108%。[结论]EDTA促进剂可提高测定的准确性。

[Objective] To explore the accelerant's effect in the determination of total chromium in soil sample according to the national standard method (GB/T 17137 - 1997). [Methods] Select EDTA as a new accelerant. [Results] The recovery of the known samples is 89%-108% when EDTA accelerant is used. [Conclusion] Selecting EDTA as accelerant helps to determinate total chromium in soil sample more accurate.