Thermo Fisher, 951211, Orion™ ISE Ionic Strength Adjustors (ISA) and Special Reagents

Name: Orion™ ISE Ionic Strength Adjustors (ISA) and Special Reagents
Brand: Thermo Fisher
SKU: 951211

Type: pH Adjusting ISA, For Use With (Equipment): Ammonia Electrode, Quantity: 475 mL, Unit Size: Each, Take more accurate and reproducible ISE measurements with Thermo Scientific™ Orion™ ISE Ionic Strength Adjustors (ISA) and Special Reagents. Ionic strength adjustors are used for analysis with ion selective electrodes, and special reagents are used with some ion selective electrodes.Warranty: Out of box

Catalog Number: 951211

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Category

Buffer Solutions Ready-to-Use

Pack Size475 mL

TagspH and Electrochemistry Probes and Electrodes Ion Selective Electrode Accessories

CollectionsThermo Fisher pH & Electrochemistry: Orion pH Meters, Electrodes & Buffers Thermo Fisher Clinical Analyzers & Instruments for Diagnostic Labs Thermo Fisher General Lab Supplies for Daily Workflows — Nalgene, Nunc, Samco & Matrix

Description

Type: pH Adjusting ISA
For Use With (Equipment): Ammonia Electrode
Quantity: 475 mL
Unit Size: Each
Ionic strength adjuster is added to all samples and standards to create a uniform background ionic strength, which provides more reproducible measurements. The ammonia pH-adjusting ISA (951211) and low-level ammonia pH-adjusting ISA (951210) both include a pH-indicating blue dye for instant verification of correct pH in ammonia samples and standards with no pH measurement required. The ammonia pH-adjusting ISA (951211) prevents complexation of ammonia and inhibits formation of metal hydroxides, allowing determination of total ammonia in the sample and increasing the accuracy of results. The low-level ammonia pH-adjusting ISA (951210) is ideal for ammonia samples with a concentration of 10ppm and below that do not contain metal interferences. All ionic strength adjusters and special reagents are packaged as one 1 pint (475mL) bottle, except:
• Cat. No. 941709 is packaged as two 1 quart (2 x 1L) bottles
• Cat. No. 941609 is packaged as four 1 pint (4 x 475mL) bottles
• Cat. No. 940909 is packaged as one 1 gallon (3.7L) bottle
• Cat. No. 940999 is packaged as four 1 gallon (4 x 3.7L) bottles

Specifications

General

Description	pH Adjusting ISA for Ammonia Electrode
For Use With (Application)	Ionic strength adjustors used for analysis with ion selective electrodes and special reagents used with some ion selective electrodes
Packaging	Bottle
Quantity	475 mL
For Use With (Equipment)	Ammonia Electrode
Type	pH Adjusting ISA
Unit Size	Each

FAQs

Question: What is this reagent used for?

Answer:It adjusts pH and ionic strength for ammonia ion-selective electrode measurements.

Question: What volume is supplied?

Answer:The bottle contains 475 mL.

Question: Why is pH adjustment needed?

Answer:Raising the pH converts ammonium to dissolved ammonia so a gas-sensing ammonia electrode can measure it consistently.

Application Note

Orion™ 951211 is a pH-adjusting ionic-strength adjustor for ammonia ion-selective electrode measurements. This configuration contains 475 mL and is designed for use with compatible ammonia electrodes. The reagent raises sample pH so ammonium is converted to dissolved ammonia, enabling gas-sensing ammonia electrodes to respond consistently. It also helps control ionic-strength effects between calibration standards and unknown samples. A pH-indicating blue dye provides a visual aid during sample preparation. This formulation is used particularly when sample matrices may contain metallic ions that could affect measurement chemistry. The ISA is added to standards and samples in the proportions specified by the ammonia ISE method so calibration conditions and sample conditions remain comparable throughout the analysis.

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