Which Nitrate ISA should I use for the IntelliCAL™ Nitrate ISE?

Document ID

Document ID TE861

Published Date

Published Date 13/03/2017
Question
Which Nitrate ISA should I use for the IntelliCAL™ Nitrate ISE?
Summary
Nitrate Ion Selective Electrode (ISE) ISA
Answer
Nitrate Ionic Strength Adjustor Powder Pillows - pk/100 (catalog number 2984799) is listed for both the HQd and sension+, and Nitrate Ionic Strength Adjustor (ISA) Powder Pillows, 100/pk (catalog number 4456369) is referenced periodically. The formulation these two products are different, Nitrate Ionic Strength Adjustor (ISA) Powder Pillows, 100/pk (catalog number 4456369) is AgSO4, AlSO4, and potassium sulfamate; whereas Nitrate Ionic Strength Adjustor Powder Pillows - pk/100 (catalog number 2984799) is just NaPO4. It would be preferential to use Nitrate Ionic Strength Adjustor (ISA) Powder Pillows, 100/pk (catalog number 4456369) since it has the silver to drop out the chloride interference.