In the ionic determination, the effective spectrophotometry to Cr and Mo without interference were found for the use of CV and DPCO in PEG phase and salt water phase.

• 在离子的测定方面,利用二苯偶氮羰酰肼和结晶紫作显色剂,寻求出在PEG相中和盐水相中对铬和钼互不干扰的分光光度测定方法。