Please refer to the list of tests for more information on our methods, or download the full testing services PDF for further test information.
Tests marked * are ISO17025 accredited
|Acid number of aviation turbine fuels – Colour indicator titration||
Determination of the acid constituents in aviation turbine kerosine (ATK) at levels below 0.100mg KOH/g, by colour indicator titration method. Trace acids remaining after treatment during the refining of aviation turbine fuels may cause corrosion of metals or impair the water separation characteristics of the fuel. This method is more sensitive at low levels than IP139.
|Thiol (mercaptan) sulphur in light and middle distillate fuels - Potentiometric method||
Determination of thiol sulphur (mercaptan sulphur) in light distillates, such as gasoline and naphtha fractions, and middle distillate fuels, such as kerosine and gas oil, in the range of 0.0003 to 0.0100% (m/m), (3 to 100 mg/kg). Organic sulphur compounds, such as sulphides, disulphides and thiophene do not interfere. Elemental sulphur does not interfere at contents less than 0.0005% (m/m). Hydrogen sulphide interferes if not removed.
|Mercaptans, hydrogen sulphide, elemental sulphur and peroxides - Doctor test method||
Doctor test for detecting the presence of mercaptans (thiols), hydrogen sulphide, elemental sulphur and peroxide in automotive fuels, kerosines and other middle distillate petroleum products. The presence of a number of substances in the test sample can affect the result of the test: Peroxides – only suitable for trace levels of peroxides; Carbon disulphide and phenolic substances can impact the test.
|Distillation characteristics at atmospheric pressure||
Determination of the distillation characteristics of light and middle distillates at atmospheric pressure, by automatic apparatus. Samples will typically have end points below 400°C.
|Flash point - Abel closed-cup method||
ethod for the determination of the manual and automated closed-cup flash point of combustible liquids having flash points between –30.0°C to 75.0 C. The precision given for this method is only valid for flash points in the range −8.5°C to 75.0°C.
|Density - Oscillating U-tube method *||
A UKAS ISO17025 accredited method for the determination of the density of crude petroleum and related products within the range 600 to 1100 kg/m3 by oscillating U-tube density meter. Suitable for liquids of any vapour pressure, that can be kept a single phase with light end evaporation. The density value measured at one temperature can be converted to the density at another temperature using petroleum measurement tables.
|Freezing point of aviation fuels - Automatic laser method||
Test method for the determination of the temperature below which solid hydrocarbon crystals form in aviation turbine fuels. This test method can be used over the temperature range of -80 to 20°C, but the precision is only determined over the range -60 °C to -42°C.
|Freezing point of aviation fuels - Manual method||
Method for determination of density (15°C) by glass hydrometer of crude petroleum, and hydrocarbon liquids with a Reid vapour pressure (RVP) of ≤100 kPa. This method can be used for viscous liquids by carrying out at a higher temperature. It can also be used for opaque liquids.
|Transparent and opaque liquids - Kinematic viscosity and calculation of dynamic viscosity||
Determination of the kinematic and dynamic viscosities of transparent and opaque liquid hydrocarbons. The time for a volume of liquid to flow through a calibrated glass capillary viscometer under gravity is measured and the kinematic viscosity calculated by multiplying this time by the Viscometer Constant. Dynamic viscosity is kinematic viscosity x density.
|Smoke point of kerosine, manual and automated method||
Determination of the smoke point of kerosine (manual and automatic). The smoke point is associated with the hydrocarbon types in the kerosine.
|Corrosiveness to copper - Copper strip test||
This standard specifies a method for the determination of the corrosiveness to copper of liquid petroleum products and certain solvents. Volatile products, having a maximum vapour pressure of 124 kPa at 37.8°C are included.
|Thermal oxidation stability of gas turbine fuels||
JFTOT procedure for rating the tendencies of aviation gas turbine fuel to deposit decomposition products within the fuel system. The test results are indicative of fuel stability during gas turbine operating and can be used to assess the level of deposits that form when liquid fuel contacts a heated surface at a specified temperature.
|Existent gum content of aviation turbine fuel - Jet evaporation method||
Determination of the existent gum content of aviation turbine fuel. Large quantities of gum are indicative of contamination of fuel by higher boiling oils or particulate matter and generally reflect poor handling practices in distribution downstream of the refinery.
|Antioxidant (AO32) content of aviation fuel - HPLC method||
This method is intended for the direct quantitative determination of commercial 2,4-dimethyl, 6-tertiary butyl phenol in aviation turbine fuels over the concentration range 5-40 mg/l by high performance liquid chromatography (HPLC).
|Static dissipater additive (SDA) in aviation turbine fuel - HPLC method||
This standard describes a procedure for determining the static dissipater additive (SDA) content of aviation turbine fuel over the range 1 mg/l to 12 mg/l, by solid phase extraction and high performance liquid chromatography (HPLC). The SDA used to develop this test method was STADIS® 450 for aviation fuels.
|Electrical conductivity of aviation and distillate fuels||
Determination of the electrical rest conductivity of aviation and distillate fuels, with or without a static dissipater additive, in the range 1 pS/m to 2000 pS/m using a portable meter.
|Level of cleanliness of aviation turbine fuel - Portable automatic particle counter method||
Determination of the level of dispersed particles in aviation turbine fuel, specifically dirt particles and water droplets in the range from 4 μm(C) to 30 μm(C), up to a maximum of 60,000 cumulative counts per ml.
|Aromatic hydrocarbon types in aviation fuels - HPLC method with refractive index detection||
Method for the determination of mono-aromatic and di-aromatic hydrocarbon contents in aviation kerosenes and petroleum distillates boiling in the range 50°C to 300°C. This method is applicable to distillates containing 0 to 75% m/m mono-aromatic hydrocarbons and 0 to 25% m/m di-aromatic hydrocarbons.
|Microbiological analysis in fuels, lubricant and water samples||
Detection and enumeration of contaminating microbes in fuel, lubricants and water. Many microbes are able to grow in water or dispersed in fuels and oils, attacking and feeding on the hydrocarbons and the additives present and causing fouling and corrosion. This test method can be used for petroleum products, such as aviation fuel, marine diesels, gas oils, heavy fuels, automotive diesel and gasoline, bio-fuels, lubricants and hydraulic oils. The test will also detect microbes in water, eg from the tank drains, and other fluids. This method detects the important bacteria, yeasts and mould which can contaminate petroleum products including Hormoconis resinae, Aspergillus, Candida and Pseudomonas species.
|Particulate contaminant in aviation turbine fuels by laboratory filtration||
Gravimetric determination of particulate contamination in aviation turbine fuel by filtration. Due to the difficulty associated with obtaining reliable results, a single one-off determination by this method is of limited value. This method is used to indicate significant trends or changes in particulate levels at specific locations where typical values have been established. This information may be used to monitor the impact of operational changes. Precision has only been determined for 51 samples in the range 0.00 mg/l to 0.60mg/l. Particulate matter present in aviation turbine fuels should be minimised to avoid filter plugging and operational problems. Tolerable levels of particulate contaminants are not established for all points in fuel distribution systems but have to be stringently controlled.
|Fatty acid methyl esters (FAME), derived from bio-diesel fuel, in aviation turbine fuel - GC-MS with selective ion monitoring / scan detection method||
Method for the identification and quantification fatty acid methyl ester (FAME) as a contaminant in aviation turbine fuel (AVTUR) by SIM mode GC/MS. This method measures the most common FAMEs in the range 4.5 to 150 mg/kg. Lighter FAME - eg that derived from coconut oil - may be subject to interference from AVTUR components and may not be quantified at low levels.
|Sulphur in petroleum and petroleum products by energy dispersive x-ray fluorescence (EDXRF) spectrometry||
This test method covers the determination of total sulphur in petroleum and petroleum products in the range 20 - 1000 mg/Kg. These materials can include diesel fuel, jet fuel, kerosine, other distillate oil, naphtha, residual oil, lubricating base oil, hydraulic oil, crude oil, unleaded gasoline, gasohol, biodiesel, and similar petroleum products. For samples with high oxygen contents (>3 wt %) sample dilution or matrix matching must be performed to assure accurate results.
|Naphthalene hydrocarbons in aviation turbine fuels by ultraviolet (UV) spectrophotometry||
This test method covers the determination, by ultraviolet (UV) spectrophotometry, of the total concentration of naphthalene, acenaphthene, and alkylated derivatives of these hydrocarbons in jet fuels. This test method is designed to analyze fuels containing not more than 5% of such components and determines the maximum amount of naphthalenes that could be present.
|Water separation characteristics of avaiation turbine fuels by portable separometer||
This test method covers a rapid portable means for field and laboratory use to rate the ability of aviation turbine fuels to release entrained or emulsified water when passed through fiberglass coalescing material. The procedure section of this test method contains two different modes of test equipment operation. The primary difference between the modes of operation is the rate of fuel flow through the fiberglass coalescing material. Test method selection is dependent on the particular fuel to be tested.
|Saybolt colour of petroleum products - Saybolt chromometer method||
This test method covers the determination of the colour of refined oils such as undyed motor and aviation gasoline, jet propulsion fuels, naphthas, kerosine, petroleum waxes and pharmaceutical white oils. NOTE: For determining the color of petroleum products darker than Saybolt Color − 16, see Test Method D1500. This test method reports results specific to this test method and recorded as "Saybolt Color units."
|Free water and particulate contamination in distillate fuels - Visual inspection procedures||
ASTM D4176 Procedure 1
Procedure 1 provides a rapid pass/fail method for estimating the presence of suspended free water and solid particulate contamination in distillate fuels having distillation end points below 400°C and an ASTM colour of 5 or less. Procedure 2 provides a gross numerical rating of haze appearance.