Is it ok to use 25 mL NitraVer® 5 Reagent Powder Pillows if the Hach Method specifies 10 mL powder pillows?

Document ID

Document ID TE523

Version

Version 5.0

Status

Status Published

Published Date

Published Date 03/30/2018
Question
Is it ok to use 25 mL NitraVer® 5 Reagent Powder Pillows if the Hach Method specifies 10 mL powder pillows?
Summary
Using 25 mL NitraVer® 5 reagents with a 10 mL method
Answer
The chemistry of the cadmium reduction powder pillows is sensitive to pH and shaking. The ratio of acidic buffers in the 10 mL powder pillows is not the same as the ratio of acidic buffers in the 25 mL powder pillows. Thus, the amount of color change is different and the instruments are calibrated differently to account for this. Using the wrong size sample and powder pillow will likely give inaccurate results, especially when using the NitraVer® 5 reagents. Therefore, Hach does not recommend using 25 mL NitraVer® 5 Reagent Powder Pillows if the Hach method specifies 10 mL NitraVer® 5 Reagent Powder Pillows.

Was this answer helpful?

Submitting...
Thank you for your feedback!
There was an error with your submission. Please try again.