| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: invention relates to analytic chemistry, namely to method of obtaining material, based on product of cellulose oxidation, used in production of reactive indicator papers or for concentration of heavy metals from solutions during their analytic determination. Aldehyde cellulose is processed with equivalent amount of aminoguanidine carbonate. Reaction is carried out in hydrochloric acid medium at temperature higher than 50C with further neutralisation with caustic at pH 8-9 and heating according to schedule Formed guanidyl hydrozone cellulose is filtered. Then it is washed with distilled water until washing waters become neutral and dried in vacuum-exicator above granulated caustic potash. ^ EFFECT: claimed method is simple and harmless. ^ 1 ex, 3 tbl |
