Fuels & solid fuels
Biodiesel
Fuel-property, ester-content, stability, contamination and specification-related biodiesel parameters.| Test / parameter | Published method | Technical purpose | Interpretation context | Capability |
|---|---|---|---|---|
| Density / Specific Gravity | ASTM D1298 / ASTM D4052 / ISO 12185 | Measures mass per unit volume and supports product identification or specification review. | A result above or below the applicable range may indicate product mixing, contamination, composition change or an incorrect grade. | Inhouse |
| Kinematic Viscosity at 40 °C | ASTM D445 / ASTM D7042 / ISO 3104 | Characterises resistance to flow and, where applicable, viscosity response to temperature. | Higher viscosity may accompany oxidation, soot or heavier-product contamination; lower viscosity may accompany dilution, shear or lighter-product mixing. | Inhouse |
| Carbon Residue - RBCR | ASTM D524 / ISO 10370 | Assesses the tendency to leave carbonaceous residue under the selected procedure. | A higher result indicates greater residue-forming tendency; relevance depends on the fuel grade and application. | Inhouse |
| Sulphur Content | ASTM D4294 | Quantifies sulphur in the submitted fuel or material. | A higher result may affect specification compliance, emissions-related requirements or process suitability; compare with the identified grade. | Inhouse |
| Sulphated Ash | ASTM D874 / ISO 3987 | Measures non-combustible residue remaining after controlled combustion. | A higher result indicates more inorganic residue and may affect fuel quality, deposits or specification compliance. | Inhouse |
| Water Content | ASTM D6304 / ISO 12937 | Quantifies water or moisture in the submitted material. | A higher result may indicate ingress, condensation, storage or handling contamination; significance depends on the product and applicable limit. | Inhouse |
| Sediments by Centrifuge | Chem-Tech Test List | Assesses particulate, sediment or insoluble contamination in the sample. | A higher result indicates more suspended or insoluble material; acceptability depends on the equipment, product specification and sampling point. | Inhouse |
| Copper Strip Corrosion | ASTM D130 / ISO 2160 | Measures or evaluates copper strip corrosion under the published method. | A higher or lower result is interpreted against the applicable specification, sample type and available reference data; direction alone does not establish conformity. | Inhouse |
| Total Acid Number | ASTM D664 | Measures acidic constituents under the selected method. | An increase from the reference may support oxidation or acidic-contamination review; a single result must be compared with product and service history. | Inhouse |
| Total Contamination | EN 12662 | Assesses particulate, sediment or insoluble contamination in the sample. | A higher result indicates more suspended or insoluble material; acceptability depends on the equipment, product specification and sampling point. | Inhouse |
| Ester / FAME Content | EN 14103 | Measures or evaluates ester / fame content under the published method. | A higher or lower result is interpreted against the applicable specification, sample type and available reference data; direction alone does not establish conformity. | Inhouse |
| Phosphorus and Alkali Metals | ASTM D7111 | Reports selected wear, contaminant, additive or composition-related elements. | Higher or lower values require comparison with formulation, metallurgy, process inputs and trend history; one result alone does not establish the source. | Inhouse |
| Iodine Value | EN 14104 | Measures or evaluates iodine value under the published method. | A higher or lower result is interpreted against the applicable specification, sample type and available reference data; direction alone does not establish conformity. | Inhouse |
| Gross Calorific Value | ASTM D240 | Measures the heat released during controlled combustion. | A higher value indicates greater energy content per reported basis; a lower value may reflect moisture, ash or material-composition differences. | Inhouse |
| Flash Point - PMCC | ASTM D93 | Determines the temperature at which vapour ignites under the selected procedure. | A lower result may indicate volatile contamination or product change; a higher result is interpreted against the identified grade and method. | Inhouse |
| Oxidation Stability | EN 14112 | Assesses oxidation stability or condition-related spectral indicators. | Greater oxidation-related change may indicate degradation; stability results and spectral trends must be interpreted using the applicable method and reference. | Inhouse |
| Methanol and Ethanol Content | EN 14110 | Measures or evaluates methanol and ethanol content under the published method. | A higher or lower result is interpreted against the applicable specification, sample type and available reference data; direction alone does not establish conformity. | Outsourced |
| Total and Free Glycerol | ASTM D6584 | Measures or evaluates total and free glycerol under the published method. | A higher or lower result is interpreted against the applicable specification, sample type and available reference data; direction alone does not establish conformity. | Outsourced |