How can yellowed sample cells be cleaned?

Document ID

Document ID TE138

Version

Version 2.0

Status

Status Published

Published Date

Published Date 27/05/2017
Question
How can yellowed sample cells be cleaned?
Summary
Recommendation for cleaning yellow stained sample cells or pour-thru cells
Answer
Glass and plastic sample cells can be stained yellow over time. The nitrogen-ammonia reagent sets produce a yellow color during the chemical reactions. For the Nitrogen-Ammonia Nessler Method 8038 a yellow color is formed proportional to the ammonia concentration. For the Nitrogen-Ammonia Salicylate Method 8155 the yellow color is the reagent color and the solution turns green in the presence of ammonia.

The discolored yellow sample cells or pour-thru can be cleaned using Sodium Thiosulfate Powder Pillows Catalog Number 2293766 about once per week to remove the yellow color.