Blogs
Can HunterLab instruments measure APHA/Pt-Co/Hazen Color above 500?
Posted on by Ken Phillips
Ken PhillipsMr. Philips has spent the last 30 years in product development and management, technical sales, marketing, and business development in several industries. Today, he is the global market development manager for HunterLab, focused on understanding customer needs, providing appropriate solutions and education, and helping to solve customer color challenges across these industries and cultures.
ASTM Industrial Test Methods for visual and instrumental APHA Color Scale
Posted on by Ken Phillips
FAQ: “Does HunterLab have any documentation to show that the UltraScan VIS is compliant with ASTM 1209. One of our customers is having a problem regarding the method. Their client is using the manual visual method for performing the ASTM 1209 color test method whereas they use the UltraScan VIS. Can you explain the difference?” […]
What standard do I use to verify Yellowness Index Performance?
Posted on by Ken Phillips
There are no physical liquid standards specifically designed to verify the Yellowness Index of liquid samples over time. Yellowness Index is defined as a mathematical function such that a perfect clear of 100% transmission, typically represented by the transmission cell filled with DI water, will have a YI value of 0. However, a good workaround solution […]
What scale is used to measure the color of waste water?
Posted on by Ken Phillips
“True Color”, “Apparent Color”, “Adams-Nickerson”, “Biodegradable Colour” are all the same name for what we call ADMI Color (American Dye Manufacturer’s Institute). Ken PhillipsMr. Philips has spent the last 30 years in product development and management, technical sales, marketing, and business development in several industries. Today, he is the global market development manager for HunterLab, […]
How do I use the round Small Volume (4 ml) 10 mm Transmittance Cell?
Posted on by Ken Phillips
HunterLab’s round cell (A13-1011-613) is a practical small volume cell for transmittance color and haze measurements. Ken PhillipsMr. Philips has spent the last 30 years in product development and management, technical sales, marketing, and business development in several industries. Today, he is the global market development manager for HunterLab, focused on understanding customer needs, providing appropriate […]
References for Hazen Color Scale
Posted on by Ken Phillips
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 […]
How do I measure “clear and colorless” Surfactants?
Posted on by Ken Phillips
FAQ: “We are in touch with a pharmaceutical company which is looking for a spectrophotometer to measure the color and appearance of cationic surfactants. Can you provide any information on this topic?” Surfactants reduce the surface tension of a liquid as in the use of a dish detergent; the interfacial tensions between two liquids such as in the case of […]
Where can Liquid Gardner Color Standards be ordered?
Posted on by Ken Phillips
Ken PhillipsMr. Philips has spent the last 30 years in product development and management, technical sales, marketing, and business development in several industries. Today, he is the global market development manager for HunterLab, focused on understanding customer needs, providing appropriate solutions and education, and helping to solve customer color challenges across these industries and cultures.
History of the APHA/Pt-Co/Hazen Color Scale
Posted on by Ken Phillips
“APHA” stands for American Public Health Association Color Scale, the organization responsible for the original definition and implementation of this visual color scale as a standard method for rating water quality. Ken PhillipsMr. Philips has spent the last 30 years in product development and management, technical sales, marketing, and business development in several industries. Today, […]
APHA/Pt-Co/Hazen vs Gardner color scales: What’s the difference?
Posted on by Ken Phillips
The APHA/Pt-Co/Hazen and Gardner visual color scales were both originally based on liquid chloroplatinate color standards but have different history and intended use. Ken PhillipsMr. Philips has spent the last 30 years in product development and management, technical sales, marketing, and business development in several industries. Today, he is the global market development manager for […]
What Path Length Cell should I use for APHA/Pt-Co/Hazen Color Measurement?
Posted on by Ken Phillips
FAQ: ” We are currently using a 10 mm path length and read in the 0 – 50 region for APHA/Pt-Co/Hazen Color, usually in the area of 10. Would you recommend a 10 mm path length with our equipment for this application?” Ken PhillipsMr. Philips has spent the last 30 years in product development and management, […]