Electrodes. How do they stack up against other analytical methods? First of all, ORION electrodes are the one measuring technology that gets you both cations and anions— the common ones like sodium, chloride, potassium, nitrate, calcium, sulfide and many more. Electrodes measure dissolved gases such as ammonia, sulfur dioxide, and nitrogen dioxide. Next, electrode measurements are intrinsically simpler than other analytical techniques. Time-consuming steps such as filtrations, weighings, distillations, and titrations are not required in most cases. Because electrode methods are easy, fewer analyses are botched and standard deviations are tighter. Electrodes don't require a lot of read-out paraphernalia such as curve linearizers, integraters, and strip-chart recorders— you can read concentration directly on an ORION specific ion meter. Electrode methods save time— one minute per sample is typical. Frequently, multiple samples can be analyzed faster by electrode than by autoanalyzer. Since electrodes are portable, you aren't confined to making analyses in your laboratory— use them on the production floor, take them to the lake, or down to the sea!
Electrodes are sensitive— they measure down to parts per billion. They'll easily measure samples differing in concentration by as much as 6 decades of concentration. Electrodes aren't pigs when it comes to sample volume— a fraction of an ml will do. Most electrode interferences are easily masked or eliminated, and electrodes are not bothered one whit by sample color, turbidity, suspended matter, or viscosity. Compared to other methods of instrumental analysis, electrodes are quite inexpensive. A complete set-up for one parameter costs about $800 with additional parameters costing $200- 300 each. Analytical methods using electrodes have been worked out for most commonly encountered samples: foods, soils, waste waters, drinking waters, biological fluids and plating baths. As an ORION electrode user, you're never on your own; the applications chemists in our Technical Service Group are ready to help you with your analytical problems— and they're as close as your telephone. Want to know more about analysis by ORION electrode? Write us for a free copy of our Analytical Methods Guide.
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