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 is a preview. Log in through your library . Abstract The Ehrich reaction can, under standardized conditions, form the basis of a sensitive method of estimating certain indoles down to 1-2 μ g/5 ...

The feasibility and consistency of colorimetric estimation of chemical oxygen demand were investigated using a sufficiently large number of chemicals under varying test conditions. Chemicals ...

Leafy green vegetables such as lettuce, Asian greens, and spinach can accumulate high concentrations of nitrate-nitrogen (NO3-N), which are potentially harmful if consumed by humans. Measuring NO3-N ...

Fluorescent dyes are tools used throughout biotechnology and medicine that offer a unique method of detecting and quantifying the presence of a target molecule, cell, or tissue within an even more ...

“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 ...