Measurement by ion selective electrode (ISE) is applicable in virtually every laboratory. 

Measure ion concentrations in such samples as water, food, pharmaceuticals, and biological samples.  The main advantages of electrode technology are the variety of analytical methods available.  Choice of measurement method improves accuracy and reproducibility of results.  Direct calibration is the most commonly used electrode method.  Sample concentration is directly read on a specific ion meter or from a calibration curve.  Incremental methods increase the number of measurable species.  With these methods, electrode calibration is unnecessary, making them useful when measuring complex samples. Electrodes can also be used as end point detectors in titrations.  Electrode measurements are simpler and faster than other analytical techniques.  Time-consuming sample preparation steps such as filtrations and distillations are rarely needed.  A direct readout meter displaying concentration in units of your choice is the fastest, easiest ISE measurement system.  In comparison to other methods, such as AA or ion chromatography, the initial cost of setup is less and does not require additional expensive readout equipment.  Methods are adaptable to both lab and field use.  Sample color or turbidity does not affect the measurement.  ISEs are inexpensive.  Typically, the cost per test is only a few cents.  The design of the sensing element determines the sensitivity and selectivity for the ion of interest.  Orion ISEs have been designed to provide you with the optimum in performance and reliability. All electrodes have 1m cables.