FAQ: “This is a new EasyMatch QC Software Version 4.70. I just wonder, from software standpoint, is there a way to setup an automatic backup data files/folders to network drive?” Continue reading
Monthly Archives: January 2013
References for Hazen Color Scale
The original references were written by Allen Hazen, a chemist who first defined APHA/Pt-Co/Hazen color scale for the evaluation of water quality on behalf of the American Public Health Association:
Hazen, A. A new color standard for natural waters, American Chemist Journal (14:300), 1892.
Hazen, A. The measurement of the colors of natural waters, American Chemist Journal (18:264), 1896.
Industrial Test Methods referencing the Hazen Color Scale
ISO 2211:1973 Liquid chemical products – Measurement of colour in Hazen units (platinum cobalt scale) is an ISO method that references both Hazen and platinum cobalt color and was subsequently replaced by DIN EN ISO 6271.
Which glass vials should be used for transmittance color measurement?
HunterLab offers 3 different sizes of round, molded glass vials that can be useful for volatile samples that require a cap, are heated to high temperatures or are part of an autosampling process.