A Portable pH/ISE allow the flexibility to perform an ISE measurement with a portable. It is a laboratory measurement that requires the addition of the ISA to fix the ion activity in the sample and the use of a magnetic stirrer to keep the sample homogenous. The portable pH/ISE meter has the ion charge and formula weight pre-programmed for concentration measurements.
Benchtop pH/ISE meters include two-channel option in which a pH probe can be connected to one channel and the ammonia ISE to the other. The benchtop meters have the ion charge and formula weight pre-programmed for use with the ammonia ISE. The benchtop meters also have incremental methods pre-programmed, including the known addition, known subtraction, analyte addition, and analyte subtraction methods.
Electrodes & Probes
The ammonia ISE is a gas-sensing electrode. An alkaline ISA must be used to raise the pH of the sample in order to change any ammonium present into ammonia gas. The ISE is a convenient way to measure ammonia.
Solutions for ammonia measurement include ISE standards and ISA for calibration and measurement. Other solutions 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 spare cuvettes and caps for photometers, magnetic stirrers to ensure adequate mixing when using an ISE, and the spare parts for the ammonia ISE.
Chemical Test Kits
A variety of chemical test kits are available for measuring ammonia, from single parameter test kits to multi-parameter test kits for water quality.
Checker HC, like the chemical test kits, have a reagent-based design in which there is 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 color change is measured by a photoelectric cell which is more accurate than subjective visual interpretation.
Single parameter portable photometers are available in two ranges and can display results in multiple chemical forms. The portable photometers have a CAL Check feature that allows for performance verification and if needed, recalibration using the CAL Check standards. The portable meters are available as a meter-only option or as a kit. The kit version include a rugged carrying case and CAL Check standards.
Benchtop photometers include multi-parameter versions for water treatment, wastewater treatment, aquaculture, and nutrient analysis. Each photometer is customized to have the parameters used by a specific industry. All benchtop meters have a digital pH electrode input allowing it to be used as a traditional pH meter. All benchtop photometers can display results in multiple chemical forms.
Spectrophotometers are available with the ammonia method is pre-programmed into the meter for several of the most common ranges. 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 and can display ammonia results in a variety of chemical forms and units of measure.
Reagents include the reagents used with chemical test kits and photometers.