GB/T 14506.26-1993
Silicate rocks—Determination of cobalt content—4-[(5-Chtoro-2-pyridyl)-azo]-1,3-diamino benzene photometric method
QJ 3140.2-2001
GB/T 6730.37-1986
Methods for chemical analysis of iron ores The 4-[(5-chloro-2-phridyl)azo]-1,3-diaminobenzene photometric method for the determination of cobalt content
DB34/T 2979.3-2017
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
HG/T 5408-2018
Analytical method of chemical compositionfor pyridine hydrogenation to prepare piperidine with ruthenium carbon catalysts
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