论文部分内容阅读
近来,Gulens报导用Orion Model 1516监测器在酸性介质中测定痕量硫化氢。我们用玻璃pH电极作参比电极,测试了硫电极在酸性介质中的响应特性。结果表明,在pH2—5时,测得电位值与硫离子总量呈能斯特响应,电极性能长期良好,线性下限10~(-3)M[Na_2S];响应速度快,选择性好;溶液不易氧化。此法用于测定合成试样与造纸黑液中硫离子。不需分离,快速简单,精密度和准确度较高。
Recently, Gulens reported using Orion Model 1516 monitors for the determination of trace amounts of hydrogen sulfide in acidic media. We used a glass pH electrode as a reference electrode to test the response of the sulfur electrode in acidic media. The results show that the potentials of the potentials and the total amount of sulfide ions show a Nernst response at pH2-5. The performance of the electrode is good for a long time with the lower limit of 10 ~ (-3) M [Na_2S]. The response is fast and the selectivity is good. Solution is not easy to oxidation. This method is used to determine the sulfur content of synthetic samples and papermaking black liquor. Without separation, fast and easy, high precision and accuracy.