论文部分内容阅读
一、点滴分析发展简史很久以前,分析化学家就知道在纸上或在不渗透的表面上(如玻皿、坩锅等)用一滴溶液来进行简单的化学试验。例如;约在十七世纪初,人们就已经知道用浸有指示剂的纸来测定溶液中的氢离子或氢氧离子浓度。又如,很早就知道用淀粉试纸来试碘或用黄血盐来试被滴定溶液中的铁。到目前为止,在文献上可查考的,第一个在滤纸上进行点滴分析的,可能是席夫(H.Schiff),他在1859年发表了一篇研究论文,在滤纸上以AgNO_3来分析尿中之尿酸。因尿酸使银还原,于是随尿酸的多少,在滤
A Brief Analysis of Development Briefly Long ago, analytical chemists knew simple chemical tests with a drop of solution on paper or on impervious surfaces (glass dishes, crucibles, etc.). For example, about the early seventeenth century, it was already known to use paper impregnated with an indicator to determine the concentration of hydrogen ions or hydroxide ions in a solution. As another example, it has long been known to try iodine with starch test strips or yellow iron to test the titration solution of iron. To date, the first documented investigation on the filter paper, possibly in the literature, may be H. Schiff, who published a research paper in 1859, analyzed on filter paper with AgNO 3 Uric acid in urine. Due to uric acid to restore silver, so with the number of uric acid in the filter