ASCOPE LABORATORY TEST CORRELATION PROGRAMME FOR OCTANE NUMBER MEASUREMENT IN 1992

Authors

  • Bustani Mustafa Research and Development Centre for Oil and Gas Technology "LEMIGAS" Research and Development Centre for Oil and Gas Technology "LEMIGAS"

DOI:

https://doi.org/10.29017/SCOG.17.1.1106

Keywords:

Laboratory, Correlation Programme, Measurement

Abstract

The ASCOPE Correlation Programme for octane number measurement obtains precision octane number data for gasoline using the CFR engine and the normally used method: ASTM 2699 and IP 237. The test results of the various participating laboratories are subjected to statistical analysis to determine average values, variance, standard deviation and to reject the outliers values. The Grubbs T-test is used for the statistical rejection of outliers. This method is used by both NEG and ASCOPE in their laboratory test correlation programme. The Grubb T-test appears to be quite satisfactory for ASCOPE purposes. The implementation of the Grubbs T-test assures inter-laboratory consistency and this in turn will give the buyer or seller of the gasoline confidence in the quality of the fuel.

References

ASTM, 1980, “Test Methods for Rating Motor, Diesel, Aviation Fuelsâ€, Annual Book of ASTM Standard, Part 47, ASTM Standard, Part 47, ASTM, Pheladelphia, USA

Jasjfi E., 1991, “Comparative Study on Procedures for Rejection of Outliers in ASCOPE Laboratory Test Correlation Programmeâ€, Scientific Contribution, LEMIGAS, Jakarta

Ethyl Corporation Technical Services Laboratories, U.S.A., 1974, Precision and statistic, by Ethyl Corporation Technical Services Laboratories, U.S.A., Juni.

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Issue

Vol. 17 No. 1 (1994)

Section

Articles

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Copyright (c) 1970 SCIENTIFIC CONTRIBUTIONS OIL AND GAS (SCOG)

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