The polarimetric determination of sucrose. The effect of clarification with basic lead acetate on the optical activity and copper reducing power of sugar solutions
✍ Scribed by Watts, Francis ;Tempany, H. A.
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1908
- Weight
- 818 KB
- Volume
- 27
- Category
- Article
- ISSN
- 0368-4075
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✦ Synopsis
At the prcticnt tine no inore vexed question exists in thc province of n plicd cheniistr devoted to the npgnr industry tlinii t t n t regnrding t i e vnlidity of thc siniplc direct polnriiuctric rcnding of n ntnndnrd solution of a comniercinl HU rar w a iiiensiirc of the actual niiioiint of sucrose contninch in it. It lins h e n urgcd, nnd justly, that under certain conditions 8uch a determinntion is likely to Lo very cornidcrab1 wide of the truth, gct nt the mine time the hold whici the method tins obtained o w r the sugnr industry of thc western hemisphere, combined with its utility nnd simplicity in prncticc render it oxtrcmcly iinlikely that i t cnn over become crndicntcd in fnvour of niore nccurntc but nt the sniiio time inorc lnborioils nnnlyticnl proccsscs. On this ncoount i t boconica n rnnttcr of prime ncccssity that the condition9 under which the deterniinntion is cnrricd out shall IJC (10 nccrirato 08 possible, nnd that stnndnrd iiicthodn of yerfornh thc test shell univcrsnlly prevnil ti0 that nu two rrnn$stu situntcd in nny pnrts of the world, slid bc nblc, worliin uiidcr them conditions, to obtain identical rcsiilts wficn working on iclenticnl tiniuples.
The nttention of siignr chemists is now being Inrgely dircctod townrds tho securing of nuch uniformity, nnd the work horc to bc rccordcd is u. continuation of cfforh by ournclves in this direction. I n previous coinniunicntions suggestions linvc ~ICCII put forwnrcl Iiy us for the iiuificntion of methods of performing this determination. Thew hnvc nplxnrcd in tho West Tndinn Uullotin ns follows :--VoI. VI, pp. 32-60, two of ttic!m Iiavo ixcn rcprduccd in tiic iitcrnntionnl sugar