Term Reference

Repeatability

Conditions where independent test results are obtained with the same method on identical test items in the same laboratory by the same operator using the same equipment within short intervals of time.​ Methods will give a certain allowable range for the above conditions basis previous data sets performed by ASTM and the manufacturers.

Gas Chromatographic Methods

Gas chromatography is used to separate and identify analytes in different types of products. To break this down into simple terms sample is injected into the inlet/column of the instrument. Then a carrier gas such as helium is used to push the sample through the column where depending upon the coating it will slow down different pieces of the sample (oxygenates, aromatics, etc). Finally the pieces of sample will reach the end where the detector will used to quantify how much of each compound is present. There are many different types of detectors (TCD, FID, MS, ETC) with the most common one being Flame Ionization Detector.

WC - Wet Chemistry Methods

This is the classic form of Chemistry performed in mostly liquid phases. Examples would be D974 Acid number by color changing titration or D3227 Mercapatan sulfur.

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LAB METHODS

Lab Test Method Specifications

Test Methods
Blending
Additive Correction?
  • Yes
  • No
TEST NAME METHOD REPEATABILITY REPRODUCIBILITY BLENDING ADDITIVE CORRECTION
Acid Number
  • Acid Number
  • METHOD ASTM D974
  • REPEATABILITY None Established
  • REPRODUCIBILITY None Established
  • BLENDING linear
  • ADDITIVE CORRECTION -
  • more information
Acid Number
  • Acid Number
  • METHOD ASTM D664
  • REPEATABILITY None Established
  • REPRODUCIBILITY None Established
  • BLENDING linear
  • ADDITIVE CORRECTION -
  • more information
Acidity
  • Acidity
  • METHOD ASTM D1613
  • REPEATABILITY 0.0003
  • REPRODUCIBILITY 0.0005
  • BLENDING linear
  • ADDITIVE CORRECTION -
  • more information
Aluminum and Silicon
Api Gravity, Density, and Specific Gravity
Aromatics
  • Aromatics
  • METHOD ASTM D5769
  • REPEATABILITY variable, see method
  • REPRODUCIBILITY variable, see method
  • BLENDING linear
  • ADDITIVE CORRECTION -
  • more information
Aromatics, Olefins, and Saturates by FIA
Ash Content
  • Ash Content
  • METHOD ASTM D482
  • REPEATABILITY .003 - .007 wt. %
  • REPRODUCIBILITY .005 - .024 wt. %
  • BLENDING linear
  • ADDITIVE CORRECTION -
  • more information
ASTM Color
  • ASTM Color
  • METHOD ASTM D1500
  • REPEATABILITY .5 color unit
  • REPRODUCIBILITY 1 color unit
  • BLENDING non-linear
  • ADDITIVE CORRECTION -
  • more information
Atmospheric Distillation
Automated Vapor Pressure
Benzene by GC
  • Benzene by GC
  • METHOD ASTM D3606
  • REPEATABILITY 0.03(X) + 0.01
  • REPRODUCIBILITY 0.13(X) + 0.05
  • BLENDING linear
  • ADDITIVE CORRECTION -
  • more information
Burning Quality
  • Burning Quality
  • METHOD ASTM D187
  • REPEATABILITY see method for details
  • REPRODUCIBILITY see method for details
  • BLENDING non-linear
  • ADDITIVE CORRECTION -
  • more information
Cetane Index Calculation
Cetane Index Calculation
Complex Emission Calculation
Copper by AAS
  • Copper by AAS
  • METHOD ASTM D1688
  • REPEATABILITY variable, see method
  • REPRODUCIBILITY variable, see method
  • BLENDING linear
  • ADDITIVE CORRECTION -
  • more information
Copper Corrosion
  • Copper Corrosion
  • METHOD ASTM D130
  • REPEATABILITY None Established
  • REPRODUCIBILITY None Established
  • BLENDING non-linear
  • ADDITIVE CORRECTION yes
  • more information
DCPD Dicyclopentadiene by GCMS
Derived Cetane Number
Doctor Test
  • Doctor Test
  • METHOD ASTM D4952
  • REPEATABILITY None Established
  • REPRODUCIBILITY None Established
  • BLENDING non-linear
  • ADDITIVE CORRECTION -
  • more information
Drivability Index Calculation
Dye Content
  • Dye Content
  • METHOD ASTM D6258
  • REPEATABILITY 0.1847(x)0.5
  • REPRODUCIBILITY 0.7652(x)0.5
  • BLENDING linear
  • ADDITIVE CORRECTION yes
  • more information
Electrical Conductivity
Ethanol Purity and Denaturant Content
Existent Gums
  • Existent Gums
  • METHOD ASTM D381
  • REPEATABILITY variable, see method
  • REPRODUCIBILITY variable, see method
  • BLENDING non-linear
  • ADDITIVE CORRECTION -
  • more information
Flash Point
  • Flash Point
  • METHOD ASTM D93/ASTM D56
  • REPEATABILITY below 140° F 2.0
  • REPRODUCIBILITY below 140F 8.0
  • BLENDING non-linear
  • ADDITIVE CORRECTION -
  • more information
Freeze Point of Aviation Fuels and Gasoline
Glycerin Content of Biodiesel
Haze Rating
  • Haze Rating
  • METHOD ASTM D4176
  • REPEATABILITY 1 number
  • REPRODUCIBILITY 2 numbers
  • BLENDING non-linear
  • ADDITIVE CORRECTION yes
  • more information
Jet Fuel Thermal Oxidation Test
Lead Content in Gasoline
Lubricity Content by HFRR
Manual Cloud Point
Mercaptan Sulfur
Micro Carbon Residue
MSEP in Jet Fuel and Kerosene
Nace Corrosion
  • Nace Corrosion
  • METHOD TM0172
  • REPEATABILITY None Established
  • REPRODUCIBILITY None Established
  • BLENDING non-linear
  • ADDITIVE CORRECTION yes
  • more information
Napthalenes
  • Napthalenes
  • METHOD ASTM D1840
  • REPEATABILITY 0.0222(1.00+x)
  • REPRODUCIBILITY 0.0299(1.00+x)
  • BLENDING linear
  • ADDITIVE CORRECTION -
  • more information
Net/Gross Heat of Combustion Bomb Method
Octel High Temperature Stability
Organic Chlorides
  • Organic Chlorides
  • METHOD ASTM D4929/ATM-058
  • REPEATABILITY variable, see method
  • REPRODUCIBILITY variable, see method
  • BLENDING linear
  • ADDITIVE CORRECTION -
  • more information
Oxidation Stability
Oxygenates in Gasoline
Particulate Matter by Filtration
PH Value
  • PH Value
  • METHOD ASTM D6423
  • REPEATABILITY 0.29 pH
  • REPRODUCIBILITY 0.52 pH
  • BLENDING non-linear
  • ADDITIVE CORRECTION -
  • more information
Phosphorus in Gasoline
Pour Point
  • Pour Point
  • METHOD ASTM D97
  • REPEATABILITY 3° C
  • REPRODUCIBILITY 6° C
  • BLENDING non-linear
  • ADDITIVE CORRECTION yes
  • more information
Research and Motor Octane Ratings
Saybolt Color
  • Saybolt Color
  • METHOD ASTM D156
  • REPEATABILITY 1 color unit
  • REPRODUCIBILITY 2 color units
  • BLENDING non-linear
  • ADDITIVE CORRECTION -
  • more information
Sediment and Water by Centrifuge
Sediment by Extraction
Sediment by Hot Filtration (Existent, Accelerated, and Potential)
Silver Corrosion
  • Silver Corrosion
  • METHOD ASTM D7667
  • REPEATABILITY Not yet determined
  • REPRODUCIBILITY Not yet determined
  • BLENDING non-linear
  • ADDITIVE CORRECTION yes
  • more information
Smoke Point of Kerosene and Jet Fuel
Sulfated Ash Content
Sulfur by Chemiluminescence
Sulfur by Energy Dispersive X-Ray
Sulfur in Petroleum Products
Vacuum Distillation
Vanadium, Nickel, Iron, and Sodium in Crude Oil by AAS
Vapor to Liquid Ratio Calculation (Specification for Automotive Spark Ignition Gasoline)
Viscosity
  • Viscosity
  • METHOD ASTM D445
  • REPEATABILITY Variable, see method
  • REPRODUCIBILITY Variable, see method
  • BLENDING non-linear
  • ADDITIVE CORRECTION -
  • more information
Water by Distillation
Water by Karl Fischer
Water Reaction
  • Water Reaction
  • METHOD ASTM D1094
  • REPEATABILITY None Established
  • REPRODUCIBILITY None Established
  • BLENDING non-linear
  • ADDITIVE CORRECTION -
  • more information
White Bucket Test