The commercial control of tannery lime liquors

✍ Scribed by Bennett, Hugh Garner

• Book ID: 102317444
• Publisher: Wiley (John Wiley & Sons)
• Year: 1909
• Weight: 282 KB
• Volume: 28
• Category: Article
• ISSN: 0368-4075
• DOI: 10.1002/jctb.5000280611

✦ Synopsis

so.

Of lentlier snmplc omployed.

mixing woll tho liquor is titrntcd witli X/10 cnustio soda until n pormnnont pink is obtnincd. Ench C.C. of X / l O nllinli roquircd corresponds to 0'0017 grin. of amiiionin or 0'0014 grin. of nitrogen, or 0*00781i grin. of Iiido-siibstnnco, ns hido-substnncc contnins 17.8 pcr cont.. of nitrogoii. Coiiiniorcinl solutions of forninldcl~ydo aro iisunlly sliglitly ncid, nnd of courso niiist I)c nindo ncutrnl boforo nddiiig to tlic flask. This inny 1)c dono by ncutrnlising to phonolplitlinlcin with stnndnrd cnustic soda, or by slinking tlio solution iip mitli.bnrinm cnrhonnto and nllowing it to stnnd orcrniglit. Tho following rcsults wcro obtnincd with lcntliors trcnted with this proccss nnd witli tlio ordinnry Kjcldnlil proccss :-Pereontngc of nitrogen found.