DRY DEFECATION IN OPTICAL SUGAR ANALYSIS.
DRY DEFECATION IN OPTICAL SUGAR ANALYSIS.
复制标题
光糖分析中的干排便。
DOI：
10.1021/ja01992a006
复制
发表时间：
1904
影响因子：
15
通讯作者：
W. D. Horne
中科院分区：
文献类型：
--
作者：
W. D. Horne
I don’我对所描述的简单装置的性能并不十分满意，我相信任何一个试用过它的人都会感到满意的。它的明显优点是简单、轻便，允许在相对大体积的水中工作，并且不需要携带任何测量仪器，除了移液管。在我所做的其他试验中，我可以说我已经将空气通过碳酸氢钠水溶液（500 cc中1克）半小时。5 cc.N/碘氢氧化钡（用20 cc.水）在吸收器中。当然，这仅仅是为了证明在所处理的水中不存在游离碳酸，我向样品中加入了20毫升。硫酸，使空气通过三个分别含有25毫升，到CC，5 cc。氢氧化钡。第一种吸收剂在20分钟内脱色，第二种吸收剂在30分钟内脱色，而第三种吸收剂的颜色全部消失。空气以每秒3至5个气泡的速率通过。
T have been very much pleased with the performance of the simple apparatus described, as I am sure any one will be who gives it a trial. Its obviousadvantages are its simplicity, its portability, its permitting work to be done on comparatively large volumes of water, and itsdoing away with the need of carrying any measuring apparatus, other than a pipette, into the field. Among other tests to which 1 have subjected it, I may say that I have driven air for half an hour through an aqueous solution of sod" urn bicarbonate (i gram in 500 cc.) without decolorizing 5 cc.N/iobarium hydroxide (diluted with 20 cc. water) in the absorber. This of course merely served to prove the absence of free carbonic acid in the water operated on. To the sample I added 20 cc. sulphuric acid, passing the air through threeabsorbers containing respectively 25 cc., to cc., and 5 cc. of barium hvdroxide. In twenty minutesthe first absorber was decolorized; in thirty min-utes the second absorber, while the color had all butgone from the third. The air was passed at the rate of 3 to 5 bubbles per second.