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 11067.4-1989
Silver—Determination of antimony content—2-(5-bromo-2-pyridylazo)-5-diethylaminophenol spectrophotometric method
EJ/T 267.4-1984
JB/T 6237.4-1992
20060995-T-467
GB/T 32159-2015
Coking pure pyridine
GB/T 27567-2011
Pyridine for industrial use
GB/T 24199-2009
Refined pyridine - Determination of pyridine content - Gas chromatographic method
YB/T 5070-2014
α-methyl pyridine
GB/T 27715-2011
3-methylpyridine for industrial use
GB/T 689-1998
Chemical reagent--Pyridine
YB/T 5071-2015
β-methyl pyridine fraction
YB/T 5072-2014
Determination of pyridine and homologues contents of curde light pyridine
HG/T 4875~4877-2016
NY/T 4383-2023
HG/T 4478-2012
HG/T 4477-2012
HG/T 4428-2012
HG/T 4876-2016
3-Aminopyridine for industrial use
HG/T 5130-2016
Clopyralid technical material