Elemental analysis

Thermo FlashSmart 2000 CHNS/O Combustion Elemental Analyzer


This instrument measures the %C, %H, %N, %S and, in a separate measurement, %O content of organic samples, using classical combustion analysis techniques. Non-combustible substrates with an organic component can also be analyzed.  For best results, samples should be finely powdered and very dry. We also have the capability to measure liquids, gels, or viscous samples with a capsule sealer. Please see the sample submission instructions. Samples are run in batch mode with along with calibrants and standards. We have an undergraduate lab assistant available approximately 5-6 hours each week to weigh and prepare the samples for analysis. The analyzer is typically run once per week, depending on demand. The instrument accuracy specification is +/- 0.3% based upon a triplicate analysis.

The instrument is located in 1240 Hach Hall. Samples and completed sample forms must be reviewed by staff prior to acceptance for analysis. Enquiries should be directed to Sarah Cady, 515-294-5805 (office).

Rates FY'21

This instrument is used primarily by staff. The rate includes weighing of samples, sample tins, combustion column consumables, running samples, and data analysis. Staff may provide training to representatives of research groups with special access requirements, and groups who run their own samples may do so at a discount of 50%. Rates are per replicate; each sample is normally run as a duplicate or triplicate. The per-replicate rates are listed below, per sample rate is 2x or 3x depending on your requirements. CHNS runs are completely separate from Oxy runs, and require a separate set of replicates and are a separate charge. Halogenated samples are a higher charge, due to the halogen ions degrading the quartz combustion tubes at a faster rate than non-halogenated samples. 

User CategoryPer Replicate (CHNS)Per Replicate (CHNS Halo)Per Rep (O)
ISU Researchers$13.00$15.00$18.50
Non-ISU academic users$19.50$22.50$27.75
Non-academic users$39.00$45.00$55.50


Thermo FlashSmart 2000 Resources