bids are invited for procurement of standard reference materials hydranal water standard 0.1 standard for karl fischer titration , viscosity and density referance standardcertified viscosity check oil 15w40 cat cvco15w 40 , total acid number standard 0.51mg koh per gram , flash point standard certified reference material astm d 93 proc. a 184.0 c , potassium iodate , sodium chloride certified reference material traceable to nist , sodium carbonate secondary reference material traceable to nist , buffer solution ph 4.00 and traceable to srm from nist , buffer solution ph 7.00 and traceable to srm from nist , buffer solution ph 10.00 and traceable to srm from nist , potassium hydrogen phthalate secondary reference material traceable to nist total quantity : 2994