GB/T 11220.1-1989
Determination of uranium in soil--CL-5209 extractant-containing resin separation 2-(5-bromo-2-pyridylazo)-5-diethlaminophenol spectrophotometry
GB/T 11220.1-1989
Silver—Determination of antimony content—2-(5-bromo-2-pyridylazo)-5-diethylaminophenol spectrophotometric method
GB/T 11220.1-1989
GB/T 11220.1-1989
GB/T 11220.1-1989