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This free, 70-page, downloadable ebooklet discusses the theory of tunable diode laser (TDL) absorption spectroscopy and how TDL analyzers are being used. This booklet is intended as an introduction to the field of tunable diode laser spectroscopy (TDLS) and its applications for different analytical tasks. A special emphasis is placed on process analytics and the requirements of a range of measurement environments. Included in the booklet are topics such as advantages for TDL in process gas analytics, some of the most common application examples for TDLs in process analytics, signal processing techniques for TDL spectroscopy, and wavelength spectroscopy, among others. Registration is required.
PROCESS ANALYZER SETUP VIDEO
This 7-minute video on YouTube documents the physical setup of a Cerex Model UV3000H multi-gas process analyzer as used to monitor target gases in a process pipe. It's free and no registration required.
Cerex Monitoring Solutions
This tutorial, "How to Manage Vaporization in an Analytical System," discusses challenges of this process. It covers the basics of vaporization and how it affects samples and setting inputs, including temperature, pressure and flow, time delay challenges, and how to troubleshoot problems. The eight-page, downloadable PDF is free, but registration is required.
INTRODUCTION TO MASS SPECTROMETRY
This basic tutorial for chemistry students is from the University of Arizona. It covers a brief description of a quadrupole instrument, information provided by an EI mass spectrum (including a table of common isotopes), a listing of other methods, and some helpful websites. It also provides examples, the basic steps required to interpret an EI mass spectrum, and quizzes for students to gauge their progress. The tutorial is free and no registration is required.
University of Arizona, Dept. of Chemistry
This technical article defines turbidity, how it is measured, and the effects that suspended particle size, shape, distribution and stray light have on the turbidity measurement. Information is also provided on calibration standards and the different optical configurations that are available. The information is free. No registration is required.