Juha Keskiväli

Determination of carbon, hydrogen, nitrogen, sulfur, and oxygen content of an organic sample. CHNS analysis (”LECO analysis”) is performed using a flash combustion method, where the sample is combusted under 25 kPa of O2 at an elevated temperature (1000 °C), followed by gas chromatography separation and detection using a thermal conductivity detector. Oxygen is analyzed by reduction on granulated carbon at 1480 °C, utilizing high-temperature thermal decomposition and conversion of oxygen into carbon monoxide before gas chromatography separation and detection with a thermal conductivity detector. The sample can be either solid or liquid, but water in the sample affects the results. In the case of aqueous samples, it is possible to dry the sample before analysis. The price includes two parallel measurements. The results are reported as wt-% of the initial sample. The ash, drying and dry loss measurements will increase the minimum required sample material need to 300 mg. The analysis gives the total carbon, hydrogen, nitrogen, sulfur, and oxygen content of the material, but it does not identify any chemical structures. The measurement can be combined with other methods, such as GC-MS, 1H, and 13C NMR, to perform substance structure identification. Possible element packages: O, CHNS, and CHNOS.

1H NMR spectroscopic measurement for samples that can be readily dissolved in deuterated solvents. The price includes sample preparation, deuterated solvent (D₂O, DMSO-d, or CDCl₃), NMR tube, measurement, and basic data processing. The processed spectrum is delivered as an image file. Additional information and raw data can be provided upon request. Please contact Measurlabs' experts if your samples require the use of other than above mentioned deuterated solvent or special measurement conditions, such as very high temperatures or long measurement times.

The substances of very high concern (SVHC) analysis provides comprehensive material screening for SVHC substances as listed in the Registration, Evaluation, and Authorization of Chemical Substances (REACH). The maximum allowed concentration of any substance on the SVCH list is 0.1 mass-%. If the product contains more than 0.1% w/w of an SVHC substance, ECHA has to be notified and information on the safe use of the article must be provided to customers upon request. Contact us to request a quote for screening your material for SVHCs. The price of the analysis depends on the sample type.

Carbon-13 NMR spectroscopy measurement for samples that can be dissolved in deuterated solvents. The price includes sample preparation, deuterated solvent (D₂O, DMSO-d, or CDCl₃), NMR tube, measurement, and basic data processing. The results are delivered as an image file containing the NMR spectrum. Additional information and raw data can be provided upon request. Please contact our experts if your samples require the use of other than the above-mentioned deuterated solvents or atypical measurement conditions, such as very high temperatures and/or long measurement times.