How do I clean my lab glass ware and pour-thru cell for the ULR method 8282?

Document ID

Document ID TE801

Version

Version 3.0

Status

Status Published

Published Date

Published Date 07/31/2018
Question
How do I clean my lab glass ware and pour-thru cell for the ULR method 8282?
Summary
Cleaning the pour thru cell for ULR silica testing
Answer
The methods 8282 have specific recommendations for maintenance of the labware and cleaning the pour-thru cell.
Labware cleaning:

Fully clean all containers that are used in this test to remove any traces of silica. Use plastic containers for all analysis and storage because glass can contaminate the sample with silica. Small bottles or flasks with screw-type closures work well.
1. Clean containers (do not use phosphate detergents), then rinse with high quality deionized water of low-level silica concentration.
2. Soak for 10 minutes with a 1:50 dilution of Molybdate 3 Reagent in low-level silica water.
3. Rinse repeatedly with either low-level silica water or the sample before use. Keep containers tightly closed when not in use.
4. Fill the Pour-Thru Cell with this same mixture of Molybdate 3 and water. Soak for 10 minutes.
5. Rinse with low-level silica water.

Keep containers tightly closed when not in use and rinse the lab ware repeatedly with either low-level silica water or the sample before use.

Pour-Thru cell cleaning:
The Pour-Thru Cell can collect a buildup of products with color, especially if the reacted solutions stay in the cell for long periods of time after measurement.
1. Rinse the Pour-Thru Cell with a 1:5 dilution of ammonium hydroxide solution to remove the color.
2. Fully rinse with deionized water.
3. Put a cover on the Pour-Thru Cell funnel when it is not in use.

The following can also be done to clean the pour-thru cell:
-Clean pour thru cell assembly with phosphate free detergent, then rinse with high quality DI water.
-Soak for 10 minutes in 1:50 dilution of molybdate 3 reagent in low level silica water. This should rid the sample of any adhering silica.
 

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