Stabilised Formazine Primary Standard Solutions for calibration of the turbidimeter.
Stablcal Turbidity Standards Calibration Set is required for calibration of the turbidity meter. The set consists of six sealed vials. Stablcal Turbidity Standards Calibration Kit contains standards in the following concentrations: < 0.1 NTU, 20 NTU, 200 NTU, 1000 NTU, 4000 NTU and 7500 NTU. Compatible with 2100AN, 2100AN IS, TL2350 and TL2360 IS turbidimeter.
Procedure for infrequently used StablCal Turbidity Standards
This process is applicable to standards that have been in use for more than a week or to recently received standards.
For bulk solution standards: Invert the content of the bottle for a few minutes. Allow the standard to settle down for 5 minutes. Invert a few times before filling the sample cell with the standard. Use the bulk standard to rinse the sample cell. Use traditional preparation techniques to remove any optical abnormalities on the sample cell. Add the standard to the sample cell, close the sample cell and the bulk solution.
For bulk solution and sample cell standards: In addition to the aforementioned procedure, invert the content of the sample cell several times. Let the sample settle down for 2-3 minutes. The sample cell is now ready for the analysis.
Storage conditions
It is recommended to store the solution between 5 and 25 ˚C. It is required to let the standard to adjust to ambient instrument temperature before use. It is necessary to store sealed vials in the original set with the case cover on.
| Brand | Hach |
| Parameter | Turbidity |
| Concentration | < 0.1 NTU, 20 NTU, 200 NTU, 1000 NTU, 4000 NTU, 7500 NTU |
| Instrument | 2100AN, 2100AN IS, TL2350, TL2360 IS |
| Quantity | Set of 6/pk |
