Joshua Reeder

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 (1,000 °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 displayed price includes the full CHNOS package with two parallel measurements and applies to conventional organic samples. The results are reported as wt-% of the initial sample. The addition of ash, drying, and dry loss measurements will increase the minimum required sample material 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. Analysis can be split into the following packages: CHN, O, and S.

Analysis package for solid recovered fuel (SRF) covering basic fuel properties and elemental composition. The following parameters are analyzed: Parameter Limit of reporting (LOR) Moisture content 0.5% Ash content (550°C) 0.1% Gross calorific value Q(V/gr/d) 0.5 MJ/kg Net calorific value Q(V/net/d) 0.5 MJ/kg CHNOS 0.1% Total chlorine (Cl) 0.01% Total fluorine (F) 0.01% Elements by ICP: As, Ba, Be, Cd, Co, Cr, Cu, Hg, Ni, Pb, Sb, Sn, Tl, V, Zn 0.01–10 mg/kg DW Results are reported in the respective units on a dry weight basis where applicable.

This analysis is used to determine the gross calorific value (the heating value) of a solid biofuel at constant volume and the reference temperature of 25°C in a bomb calorimeter calibrated by combustion of certified benzoic acid. The heating value (calorific value or energy value) of fuel is the amount of heat released during the combustion of a specified amount of it. The package includes the calorimetry measurement and the measurement of C, H, and N content, which are needed to calculate the results. Please note that this method is available only for solid biofuels. If you require testing for any other material, please contact Measurlabs experts.

Analysis for determining the content of respirable quartz and other forms of respirable crystalline silica in products and materials. The results can be used for labeling purposes and to facilitate the development of safer products. Crystalline silica/quartz is a common ingredient in building products and other materials containing or composed of stone, gravel, clay, or sand. Exposure to respirable silica for extended periods or high exposure for short periods causes silicosis and may lead to the development of lung cancer. This is why a binding limit value has been set for workplace exposure to respirable crystalline silica in EU countries. Ensuring that materials have a low quartz content is the most effective and cost-efficient way to prevent respirable quartz exposure. In EU countries, materials containing crystalline silica and other category 1 carcinogens are subject to a classification obligation, unless carcinogens are present in quantities below 0.1 % (w/w). Consequently, such products should include the warning “May cause lung cancer by inhalation” and “Causes damage to lungs”. The obligation applies to chemically modified mineral products that contain quartz. Additionally, industrial mineral producers (IMA) in the EU have decided that even non-modified mineral products should be classified based on their crystalline silica content (fine fraction), provided the content exceeds 1.0 wt.%. Please contact the expert team through the form below for more details on the analysis.