The determination of lignin in plant material of high protein content

✍ Scribed by Armitage, E. R. ;Ashworth, R. de B. ;Ferguson, W. S.

• Publisher: Wiley (John Wiley & Sons)
• Year: 1948
• Weight: 358 KB
• Volume: 67
• Category: Article
• ISSN: 0368-4075
• DOI: 10.1002/jctb.5000670612

✦ Synopsis

of reduction with surfoce area of sheet nickel j I * 67 g. Sb. in 50 nil. const. boilittg HCl arid 50 ml H 2 0 ; heated 011 water bath Expts. 14 and 16 in Table XI show the difference between solns. heated on the water bath and those that are boiled, Expt. 15 repeats 14 using a stronger acid and Expts.

17

-20 are included to show the effect of omitting antimony from the activating solution. The results of experiments to show the variation of surface area with reduction are shown in Fig. 6. 20 mn. Expt. Sb HC1' H,O No. g. ml. ml. 14 1.252 As the reduction proceeds, the antimony concentration of the solution decreases, producing a smaller concentration gradient of antimony within the nickel powder. The protectivc f i l m of antimony on the nickel particles within the mass then breaks down and these nickel particles become part of the reducing ITAGE, Et AI.-DETER~\II~~~~TIOIV OF LIGNIh' 241 system. This action is progressive, proceeding outwards from the interior of the mass of nickel. S.W.