Nessler cylinder

Nessler cylinders are used for colorimetric analysis, such as APHA color.

The color of the substance contained in a Nessler cylinder is visually compared with the model.

The tubes often carry out a series of calibrations of solutions of increasing concentrations, which functions as a comparative scale.

To minimize differences in the subjective impression of the color of the solution of the substance to be analyzed, cylinders of a series should have the same characteristics - height, diameter, and thickness of glass.

Due to the spread of automated spectrophotometers, colorimetric assay methods using Nessler cylinders and visual assessment are used very rarely.

Determination of iron by a colorimetric method
Determination of iron by a colorimetric method, top view
Nessler cylinders with a capacity of 100 cc and 50 cc