The deternmination of rotenone in derris root. A reply

✍ Scribed by Coomber, H. E. ;Martin, J. T. ;Harper, S. H.

• Publisher: Wiley (John Wiley & Sons)
• Year: 1943
• Weight: 379 KB
• Volume: 62
• Category: Article
• ISSN: 0368-4075
• DOI: 10.1002/jctb.5000620503

✦ Synopsis

TABLE V NaCl KCI Sodium (K mg. in 1 ml.) 0.124 0.10 0.123 0.249 0.10 0.260 0*2W 0.1 0-300 0.3'13 0.1 0-370 0.093 0.4 0*085* 0.100 0-8 0*100* 0.207 0.2 0.200 0.124 0.2 0.123 0.083 0.5 O.ODB* 0.124 0.4 0*132* 0.124 0.5 0*135* 0.207 0.8 0.230* 0.332 1.3 0*345* 0.480 0.5 0.485

The inethorl & &tially adopted Thc rengeuts used were :

(1) Matigonous u r a q l a&tate stock solufiotl.-To 160.0 g. of UO2(OAe).,,2H20, 490.0 g. of B1n(OAc),,4H2O, and 138.0 nil. of 30% ncetic ncid nre ndded 1800 nil. of wnter and the solution is made up to 2 litrea. After 24 hours the solution is filtered nnd kept in n dnrk bottle.

(2) Diliclc alcoholic ittartyatious uratryl ncctatc so1tcfiori.-For lirecipitating sodium, 180;nl. of rengent (1) nrc mixed with 60 nil. of 95% nlcoliol, and, nfter 4 hours, the solution is filtered through no. 42 Whntninn filter-pnper. The solution reinnins unclrnnged for three weeks if stored in a dnrk bottle.