| 摘要 |
FIELD: analytical methods. SUBSTANCE: at least one reagent is applied on surface to be examined with the aid of air sol device, first reagent being dihydroxyxanthene dye solution in polar organic solvent at pH 1-3 and second one aqueous acetic acid solution. More particularly, 70:1 mixture of 0.3- 0.6% eosin BA or floxin acetonic solution and aqueous hydrochloric acid solution is used as first reagent. EFFECT: enabled express-evaluation without use of supplementary equipment. 3 cl, 4 tbl |
