Comparator / color disc for 4,0 - 10,0 pH
Availability: Order only
Most natural waters have a pH of 4 to 9, but they are usually higher than 7 due to carbonates and bicarbonates (alkalinity). The PH of industrial water, boilers and swimming pools is usually in a narrow range.
Before using the single-parameter test place the colored disc on the center post in the color comparator box (numbers on the front) and rinse the tubes with the sample. After finishing to do a test rinse the tubes with deionized water.
For more accurate results use a buffer solution as a sample. Chlorine with a concentration of more than 1 mg/L interferes with the test. To remove chlorine from a sample, add 1 drop of 0.1 N sodium thiosulfate solution per 25 ml of sample and mix and then use this dechlorinated sample in the test procedure. Sodium thiosulfate removes a maximum of 10 mg/L chlorine from the sample.
Step-by-step instructions for testing with the test-set Hach 17N:
- Fill the tube with a sample to 5 ml;
- Place the test tube - on the left in the color comparator box;
- Add 6 drops of indicator solution to the second tube;
- Rotate the tube to mix the sample;
- Place the second tube in the color comparator box;
- Keep the color comparator box out in the light (use sunlight or a desk lamp). Rotate the color wheel until the colors match. If the color is the same between two segments use the value in the middle of the two segments;
- Compare obtained results in pH.
|Application area||Test kits, Wastewater, Reagents, Water supply|
|Measurement Range||4,0 - 10,0 pH|
|Method||Wide range indicator|
|Number of tests||300|