ASTM D7372-12
Standard Guide for Analysis and Interpretation of Proficiency Test Program Results
- Standard No.
- ASTM D7372-12
- Release Date
- 2012
- Published By
- American Society for Testing and Materials (ASTM)
- Status
- Replace By
- ASTM D7372-17
- Latest
- ASTM D7372-21
- Scope
This guide can be used to evaluate the performance of a laboratory or group of laboratories participating in an interlaboratory proficiency test (PT) program involving petroleum and petroleum products.
Data accrued, using the techniques included in this guide, provide the ability to monitor analytical measurement system precision and bias. These data are useful for updating standard test methods, as well as for indicating areas of potential measurement system improvement for action by the laboratory. This guide serves both the individual participating laboratory and the responsible standards development group as follows:
5.2.1 Tools and Approaches for Participating Laboratories.
Administrative Reviews
Flagged Data and Investigations
Data Normality Checks
Histograms
Bias (Deviation from Mean)
Z-Scores
TPI (Industry)
PTP and Site Precision Comparisons
5.2.2 Tools and Approaches for Responsible Standards Development Groups.
TPI and precision trends
Bias via box & whisker plots
Normality evaluations
Relative standard deviations
Uncontrolled variables
Reference is made in this guide to the ASTM International Interlaboratory Cross-Check Program (ILCP) on Petroleum Products and Lubricants. Program reports containing similarly displayed results and statistical treatments may be available in other PT programs. Appendix X2 summarizes the statistical tools referenced in this guide and Appendix X3 is a collection of examples covering many of the approaches described in this guide.
1.1 This guide covers the analysis and interpretation of proficiency test (PT) program results. For participants in interlaboratory proficiency test (PT) (or crosscheck, check scheme, etc.) programs, this guide describes procedures for assessing participants' results relative to the PT program results and potentially improving the laboratory's testing performance based on the assessment findings and insights. For the committees responsible for the test methods included in interlaboratory proficiency testing programs, this guide describes procedures for assessing industry's ability to perform test methods and for potentially identifying needs for method improvement.
1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
ASTM D7372-12 Referenced Document
- ASTM D1266 Standard Test Method for Sulfur in Petroleum Products (Lamp Method)
- ASTM D2622 Standard Test Method for Sulfur in Petroleum Products by Wavelength Dispersive X-ray Fluorescence Spectrometry
- ASTM D4294 Standard Test Method for Sulfur in Petroleum Products by Energy-Dispersive X-Ray Fluorescence Spectroscopy
- ASTM D4951 Standard Test Method for Determination of Additive Elements in Lubricating Oils by Inductively Coupled Plasma Atomic Emission Spectrometry
- ASTM D5185 Standard Test Method for Determination of Additive Elements, Wear Metals, and Contaminants in Used Lubricating Oils and Determination of Selected Elements in Base Oils by Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES)
- ASTM D5453 Standard Test Method for Determination of Total Sulfur in Light Hydrocarbons, Spark Ignition Engine Fuel, Diesel Engine Fuel, and Engine Oil by Ultraviolet Fluorescence
- ASTM D6259 Standard Practice for Determination of a Pooled Limit of Quantitation
- ASTM D6299 Standard Practice for Applying Statistical Quality Assurance and Control Charting Techniques to Evaluate Analytical Measurement System Performance
- ASTM D6617 Standard Practice for Laboratory Bias Detection Using Single Test Result from Standard Material
- ASTM D6792 Standard Practice for Quality Management Systems in Petroleum Products, Liquid Fuels, and Lubricants Testing Laboratories
- ASTM D7039 Standard Test Method for Sulfur in Gasoline, Diesel Fuel, Jet Fuel, Kerosine, Biodiesel, Biodiesel Blends, and Gasoline-Ethanol Blends by Monochromatic Wavelength Dispersive X-ray Fluorescence Spectro
- ASTM E177 Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods
- ASTM E2655 Standard Guide for Reporting Uncertainty of Test Results and Use of the Term Measurement Uncertainty in ASTM Test Methods
- ASTM E456 Standard Terminology for Relating to Quality and Statistics
ASTM D7372-12 history
- 2021 ASTM D7372-21 Standard Guide for Analysis and Interpretation of Proficiency Test Program Results
- 2017 ASTM D7372-17 Standard Guide for Analysis and Interpretation of Proficiency Test Program Results
- 2012 ASTM D7372-12 Standard Guide for Analysis and Interpretation of Proficiency Test Program Results
- 2007 ASTM D7372-07 Standard Guide for Analysis and Interpretation of Proficiency Test Program Results
