The value of the polenske test in the analysis of oils and fats

For tho 0.5 C.C. of tho phosphoric mid-solution 23-34 C.C. of bnriuni liydrosidc solution vcro rcquircd (tlic nctrinl figurcs being 23.23, 2:Eti, 23.22, 23.25, 13.23 C.C. A'/lO) Corrcsponding to 15.19 grins. of phosphoric ncid pcr 100 C.C.Tlic closc ngrccmcnt with tlicory (15.17) is w r y satisfnctory.In thc lntur cspcriiiicnts tlic I)recaiition nl tnlicn of frceing tlic ncid from cnrbon diosidcthis was done by boiling in Jcnn glass rcsscls for n few niinutcs, cooling, nnd then trnnsfcrring to tliu cyliiitlcr, wing tliu sodium ncctntc solrition for rinsing piirposes.