Laboratory Manual of Spot Tests

acetic acid acid solution adsorbed adsorption alcohol alizarin alkali ammonia ammonium apparatus barium benzidine blue brown carbon disulfide cent centrifuge Chemical Basis chloride cobalt color reaction colorless Concentration Limit Consequently copper crucible cyanide detected dilute dimethylglyoxime dried drop evaporation ferric filter paper filtrate fleck fluoride formation glass groups H₂O halide heated hydrochloric acid hydrogen sulfide hydroxide Identification Limit inorganic insoluble iodide iodine ions lead sulfate liquid mercuric metal mixture neutral nickel dimethylglyoxime nitrate organic compounds organic solvents oxide paper impregnated pipette placed on filter potassium precipitate presence Procedure produced react reaction products reagent reagent paper reagent solution reduced rhodanine ring salts sample sensitivity silver chromate slightly soluble small quantities solid solution containing solution is placed spot plate spot reactions spot test spot test analysis sulfide paper sulfuric acid surface test solution test tube thallium sulfide thallous sulfide thiocyanate tion treated violet warm washed yellow