“…ion by an indirect method (191), 8-amino-7-(2-aminophenylazo)-!,6-naphthalene disulfonic acid for cobalt (256), Aluminophthalexon and Aluminophthalexon A for chromium(III) (409), and 3-N-salicylideneamino-4-hydroxybenzenesulfonic acid (652) and 8,8'-diquinolyldisulfide and its derivatives (559) for copper. Other new reagents were Ar/-hydroxy-Ar',Ar"-diphenyl-p-toluamidine and thiocyanate for iron(III) (431), l-phenyl-2,3-dimethyl-5-pyrazolonylazopyrogallol for gallium (170), 2,3,4-trihydroxy-4-sulfoazobenzene for molybdenum(VI) (171), and 2-pyridyl-2-thienyl Z-ketoxime for palladium (51) and platinum (53). Also reported as new reagents were Ar-phenyl-Ar'-(a-pyridyl)thiourea for rhodium (607), mephazine hydrochloride for ruthenium(III) (187), '-furoylphenylhydroxylamine and 1,8-dihydroxynaphthalene for titanium (149), and 2-[2-(5-chloropyridyl)azo]-5-dimethylaminophenol for zinc (166).…”