Do phosphorus tests LCK350 and TNT844 use the same chemistry?

Document ID

Document ID TE8496

Version

Version 2.0

Status

Status Published

Published Date

Published Date 08/23/2018
Question
Do phosphorus tests LCK350 and TNT844 use the same chemistry?
Summary
LCK350 TNT844 chemistry method
Answer
The phosphate (ortho/total) cuvette test Product # LCK350 (2.0-20.0 mg/L PO4-P) uses the phosphomolybdenum blue method. The Phosphorus (Reactive and Total) TNTplus Vial Test Product # TNT844 (HR 1.5 to 15.0 mg/L PO4) uses the ascorbic acid method. These chemistries are not identical.

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