ONLINE CHEMICAL TEXTBOOK
The web-based University of Michigan Chemical Engineering Process Dynamics and Controls Open Textbook is a student-contributed, open-source text. The section on Composition Sensors covers photometric and electrometric analyses, chromatography, mass spectrometry, thermal conductivity of gases, physical property measurements and other topics.
University of Michigan
pH, ORP, CONDUCTIVITY VIDEO
This video from Control's Back-to-Basics series explores wet chemistry measurements; shows how density, pH, ORP and conductivity are deceptively simple and similar; and covers density analyzers, too. Control former editor Walt Boyes demonstrates how to understand and differentiate between these three measurements.
Control
LIMITATIONS AND ADVANCES
The "analyzer resources" webpage at the Modeling and Control website is compiled by Greg McMillan, links to other articles, and describes trends making analyzers more maintainable.
MODELING AND CONTROL
ONLINE ANALYZER INTRODUCTION
The Instrumentation for Process Control online textbook, located at the free Process Control Education website and hosted by McMaster University, includes Chapter 2.5, "Onstream Analyzers," which provides an introduction to analyzers and sample systems.
McMaster University
SPECTROSCOPY AND SEPARATION
This technical paper, "Combining Spectroscopy and Separation Science in Process and Emissions Monitoring," shows how auto-carrier, frontal-elution chromatography in conjunction with a process UV spectrometer allows rapid online analysis of trace components even in complex streams.
Ametek