Turbidity Standard Solution No.1, Pharmacopoeia 2025

2025Pharmacopoeia turbidity standard solution

according to2025 Chinese Pharmacopoeia Edition 0902 Preparation of turbidity standard solution using clarity check method

0.5number,1number,2number,3number,4Turbidity standard solution100ML/bottle

New polymer turbidity standard solution: prepared using polymer materials such as polystyrene microspheres

0.5Polymer turbidity standard solution100ML/bottle

1Polymer turbidity standard solution100ML/bottle

2Polymer turbidity standard solution100ML/bottle

3Polymer turbidity standard solution100ML/bottle

4Polymer turbidity standard solution100ML/bottle

60NTUPolymer turbidity standard solution100ml/bottle

The clarity check method compares drug solutions with specified turbidity standards,Used to check the clarity of the solution.

Unless otherwise specified, according to the concentration requirements specified under each variety, the test sample solution diluted with zero turbidity water to a certain concentration and an equal amount of turbidity standard solution are placed in paired turbidity glass tubes at room temperature(inner diameter15~16mm,Flat bottomed, with a stopper, made of colorless, transparent, neutral hard glass)In the preparation of turbidity standard solution5After minutes, place it vertically under the umbrella lamp in the darkroom, with an illuminance of1000lxFrom a horizontal perspective, unless otherwise specified, the test sample should be inspected immediately after dissolution.

Clearly define the dilution water level: use visual method'用水'The unified standard is'Zero turbidity water'(That is, it conforms toISO 7027Standard high-purity water)Eliminate detection bias caused by differences in water quality

instrumental method

When using a scattered light turbidity meter, the peak wavelength of the light source is approximately860nm;The measurement range should include0.01~100NTU,at0~9.99NTUThe resolution within the range should be0.01NTU;at10~100NTUThe resolution within the range should be0.1NTU.

This method uses a scattered light turbidity meter, which is suitable for turbidity determination of colorless test solution with low and medium turbidity(The turbidity value is100NTUThe following test samples)Because high turbidity test samples can cause multiple scattering phenomena, resulting in a rapid decrease in scattered light intensity, which cannot accurately reflect the turbidity value of the test sample. When using a scattered light turbidity meter for measurement, the scattered light and the measured scattered light show90'included angle