Analytical Instrumentation
Reliable Sample Preparation of Volatile Samples
Feb 24 2013
Exeter Analytical Inc. (UK) has developed a reliable sample preparation technique that enables accurate determination of the percentage Carbon (C), Hydrogen (H) and Nitrogen (N) in difficult to analyse volatile samples. The same sample preparation technique has been found to also generate excellent results from air sensitive and hygroscopic samples.
Knowledge of the CHN content of volatile petroleum products and lubricants can be useful in determining their performance characteristics. However, the CHN microanalysis of such volatile samples, especially those with high hydrogen content, requires careful sample handling, wide detector linearity and easy sample residue removal.
The sample preparation technique, described in technical report 233, involves hermetically sealing samples into heavy walled tin capsules under an inert atmosphere inside a glove box. The tin capsule is cold welded shut using an Exeter Analytical capsule sealer. This careful sample preparation technique together with controlled introduction of the sealed capsules into an Exeter Analytical Model 440 CHN analyser is demonstrated to eliminate the problems associated with analysing air sensitive, hygroscopic and volatile samples.
Digital Edition
PIN 25.2 Apr/May
April 2024
In this Edition Safety - Carbon monoxide toxic and flammable gas detection Analytical Instrumentation - Density: A fundamental parameter at critical stages within the petroleum sector...
View all digital editions
Events
May 05 2024 Seville, Spain
May 06 2024 Riyadh, Saudi Arabia
May 06 2024 Houston, Tx, USA
May 06 2024 Houston, Tx, USA
Canada Gas & LNG Exhibition & Conference
May 07 2024 Vancouver, BC, Canada