Orion AQUAfast test strips are the answer for simple analysis of aqueous samples. Use AQUAfast to determine pH, many common ions, or water quality indicators. Test strips are ideal for sample level assessment to choose appropriate electrode calibration standards, verifying waste stream pH is identified correctly, and a screen to select water samples requiring lab testing from the field. In the laboratory, use AQUAfast when adjusting the pH of a solution to or beyond a certain reading. No instrumentation is required. The color chart on the package correlates the color change observed to the species concentration in the sample. Results are available in seconds. Test strip screening offers reliable results without the time and expense of laboratory work or calibration. The strips have no disposal issues. AQUAfast is the perfect screening test - simple, fast, and inexpensive.