There are a multitude of available test procedures and methods for water and wastewater treatment operators. They range from colorimetric, titrimetric, electrometric (meter & probe), turbimetric, ...

This article shows how the absorbance maxima of Ponceau-S is determined over a wavelength range of 220nm to 800nm using the Eppendorf BioSpectromenter ®. The methods of analysis using this ...

Colorimetry is, as the name suggests, the study of color. The technique differs from spectroscopy, which measures spectral output across a range of wavelengths, as it is concerned with how color is ...

Current Science is a fortnightly journal published since 1932 by the Current Science Association, Bangalore (India) in collaboration with the Indian Academy of Sciences. The journal covers all ...

“4. The method of claim 1, wherein the remapped gradient is a high-visibility color gradient that improves a person’s ability to determine where the test color lies within the gradient. “5. The method ...

EPA is proposing to promulgate new methods and update the regulatory tables of approved methods for pollutant analysis under the Clean Water Act specified in 40 CFR Part 136. The proposed rule affects ...