Frequently Asked Questions – Analytical Chemistry Products

The following links provide information or answers relating to frequently asked questions (FAQs) about our consumables and services for analytical chemistry.

If you need additional information, or would like to make a custom product request, please contact us!
You can reach a technical expert by e-mail at or call our Technical Service department at 814-359-3041 (US & Canada 800-359-3041).

Resolution Equation; HPLC Column Fundamentals  
When & How to Use Alternate Selectivity
Tips for Method Development (using Ascentis® & Discovery® Columns)

Gas Chromatography
Molded GC Septa (Proof of Low Bleed and High-Puncturability)

Chiral Chromatography
Chiral FAQs
Column Screening & Small-Scale Purification Services

Solid Phase Microextraction
Fiber Selection (by Analyte Type)
Performance Tips for Collection of Volatiles & Semivolatiles

Solid Phase extraction (SPE)
SPE Phases - Overview & Application (by Analyte Type)
Normal Phase Methodology
Reversed-phase Methodology 
Ion Exchange Methodology
SPE Application – Request Assistance
Dispersive (QuEChERS) SPE – Custom Request
What are Molecularly Imprinted Polymers or MIPs?

Syringe Selection
General Tips for Syringe Care
Hamilton FAQs
Analytical Standards
By Application Areas & Techniques
Specialty Packaging Service

Analytical Reagents
Derivatization Reagent Selection (by Application)

Karl Fischer Titration (Basic Principles, Variations)
Volumetric Titration (Basic Principles, Application Tips)

Air Monitoring
Carbon Adsorbents (Physical Characteristics, Cross-Reference)
Cross-Reference for SKC® Products
What is Passive/Diffusive Sampling?
What is radiello®?
How is radiello used? (Parts & Components)
Applications for radiello Passive Samplers
radiello FAQs

Introduction (Microorganisms, Factors Affecting Growth, Culture Methods, Identification)
Which Media To Use? (by Application & Microorganism)
Media Preparation