Reagecon Platinum-Cobalt (Hazen) 25 Colour Standard

Reagecon's Platinum-Cobalt (Hazen) 25 Colour Standard can be used to calibrate, control, qualify or validate colour measurement instruments. This standard can be described as Platinum-Cobalt, Pt-Co, Hazen or APHA colour. All descriptions are interchangeable. This product is used extensively in the water industry and several other industries. The standard covers the requirements of ASTM Method D 1209. This product is prepared gravimetrically on a weight/weight basis. Both solute and solvent are weighed on a balance calibrated by Reagecon engineers using OIML traceable weights. Reagecon holds ISO 17025 accreditation (A2LA Ref: 6739.02) for calibration of laboratory balances. The concentration of each standard is verified using a high performance top of the range calibrated spectrophotometer.