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据报道,Sugawara 等曾研制过7-碘-8-羟基喹啉-5-磺酸根液膜电极并用于电位滴定测 Cu~(2+),但8-羟基喹啉-5-磺酸根 PVC 膜电极未见报道。本文报道8-羟基喹啉-5-磺酸根电极的研制、性能及自动电位滴定法测定镀液中的镍。(一)主要仪器及试剂821型离子计,自动电位滴定仪。十六烷基三辛基碘代铵(HTOA-I)。8-羟基喹啉-5-磺酸(H_2QS)标准溶液:将四级的 H_2OS 进行多次重结晶提纯。准确称取提纯的 H_2OS 1.23g,加少量 NaOH 溶液溶解,用 KH_2PO_4-Na_2HPO_4缓冲液(pH≈6.5)
It has been reported that Sugawara et al. Have developed 7-iodo-8-quinolinolate-5-sulfonate membrane electrode and used for potentiometric titration of Cu 2+, but 8-hydroxyquinoline- Electrodes have not been reported. This paper reports the development of 8-hydroxyquinoline-5-sulfonate electrode, performance and automatic potentiometric titration of nickel in the bath. (A) of the main instruments and reagents 821 ion meter, potentiometric titrator. Cetyltrioctylammonium iodide (HTOA-I). 8-hydroxyquinoline-5-sulfonic acid (H 2 QS) standard solution: four levels of H 2OS repeated recrystallization purification. Weigh accurately purified H 2OS 1.23g, add a small amount of NaOH solution was dissolved, with KH_2PO_4-Na_2HPO_4 buffer (pH≈6.5)