2660449 Stablcal Turbidity Standard 200 NTU, 500 mL

Stablcal Turbidity Standard (p/n 2660449) is required for calibration of the turbidimeter. Each bottle contains 500 mL. The standard has the concentration of 200 NTU. Stabilised Formazine Primary Standard Solution is compatible with the following instruments: TL23, TU52, 2100Q, 2100N and 2100AN. The solution features increased stability providing fast and repeatable results, without the time and effort required for lab-prepared standards.

Procedure for infrequently used StablCal Turbidity Standards

This procedure applies to standards used over a week ago or to new standards received from the manufacturer. 

For bulk solution standards: Invert the standard repeatedly for 2-3 minutes before breaking the bottle seal. Allow the standard settle down for a few minutes. Invert 2-3 times before adding the standard into the sample cell. Rinse the sample cell at least one time with the bulk standard. Remove any optical deviations on the sample cell. Add the standard in the sample cell, close the sample cell and the bulk solution.

For bulk solution and sample cell standards: Additionally to the aforementioned procedure, invert the sample cell 2-3 times and let the sample to settle down for several minutes. The sample cell is now ready for the analysis.

Storage conditions

Store standards at the following temperature: 5 ˚C - 25 ˚C. Refrigerate the solution for long-term storage at the following temperature: 5 ˚C.