Solutions for phosphorus measurement include the CAL Check standards for verifying and, if needed, the calibration of our portable photometers. Each CAL Check standard is supplied with a Certificate of Analysis stating the accuracy and traceability of the standard.
Accessories include the replacement cuvettes and caps for the photometers and Checker HC. Also included is the COD reactor that is used to digest the samples for acid hydrolysable and total phosphorus measurements.
Chemical Test Kits
Multiparameter Chemical Test Kits (CTK) are available to measure phosphorus in soil. These kits include other key parameters including nitrogen and potassium.
For educational use there is the Hanna Backpack Lab for Soil Quality. The Backpack Lab includes a phosphorus test kit along with a teacher’s guide that discusses the importance of the parameter.
Checker HC, like a chemical test kit, are reagent based designs with a color change based on concentration. The handheld colorimeters, like portable and benchtop instrumentation, use the Beer-Lambert principle to determine the color change. The change in color is not subjective as with using the naked eye. A marine version is available with chemistry that is compatible for use with saltwater aquariums.
A portable photometer is available to measure phosphorus and display results in multiple chemical forms. The portable photometer has the CAL Check feature that allows for performance verification and, if needed, recalibration using the CAL Check standards. The meter is available as a meter only or as a kit. The kit version includes a rugged carrying case and CAL Check standards.
Benchtop photometers include multiparameter versions for water and wastewater treatment. These photometers can measure all three forms of phosphorus and are able to display results in multiple chemical forms. All benchtops have a digital pH electrode input allowing it to be used as a traditional pH meter.
Spectrophotometers are available that have phosphorus methods in several ranges pre-programmed into the meter. The spectrophotometer offers the highest precision due to the quality of the optical system that has a wavelength accuracy of +/- 1.5 nm. The spectrophotometer allows for custom methods to be used as well.
Replacement reagents for the photometers, Checker HC, and chemical test kits. Reagents include all forms of phosphorus including reactive (orthophosphate as phosphorus), acid hydrolysable (condensed or polyphosphates), and Total Phosphorus.