某些氨羧络合剂对黑白药液稳定性的影响

Influence of some Chelating Agents on the Stability of B&W Developer

研究了乙二胺四乙酸（ＥＤＴＡ）、丙二胺四乙酸（ＰＤＴＡ）、二乙三胺五乙酸（ＤＴＰＡ）和三乙四胺六乙酸（ＴＴＨＡ）对黑白显影液稳定性的影响。结果表明，加入４种氨羧络合剂后，显影液的稳定性顺序为ＰＤＴＡ＞ＥＤＴＡ＞ＤＴＰＡ＞ＴＴＨＡ；用Ｐｂ２＋－双硫腙／氯仿反萃取法测定氨羧络合剂的量时发现。

The influence of EDTA.PDTA.DTPA and TTHA is studied. The stability of developer can be improved in the order of PDT A > EDTA M DTPA > TTHA. The concentrations of the chelating agents are determined with Pb2+ -HD2/CHCl3 in inverted extration, and the results show that the self consuption of the chelating agents apparently contributes to the life of developer.