[Studies on hydroxyfluoran and its derivatives as organic reagents. IX. Determination of rare earth elements with 3,4,5,6-tetrachloro-3',4',5',6'-tetrahydroxyfluoran methyl ester].
D004602:Elements / Q000032:analysis*; D004952:Esters; D007202:Indicators and Reagents; D010636:Phenols; D010795:Phthalic Acids; D012987:Soil; D013053:Spectrophotometry
D004602:Elements; D004952:Esters; D007202:Indicators and Reagents; D010636:Phenols; D010795:Phthalic Acids; D012987:Soil