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ASTM D7739-11(R2020) pdf download

ASTM D7739-11(R2020) pdf download

1.1 This laboratory practice covers the quantitative determi-nation of surface deposits produced during the thermal oxida-tion of gas turbine fuels by monitoring the oscillation fre-quency of a quartz crystal during thermal exposure. In this practice, “thermal oxidative stability” refers to the tendency of a fuel to resist surface deposit formation during heating. 1.2 The values

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ASTM D7684-11(R2020) pdf download

ASTM D7684-11(R2020) pdf download

1.1 This guide covers the classification and reporting of results from in-service lubricant particulate debris analysis obtained by microscopic inspection of wear and contaminant particles extracted from in-service lubricant and hydraulic oil samples. This guide suggests standardized terminology to promote consistent reporting, provides logical framework to document likely or possible root causes, and supports inference

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ASTM D7504-17a pdf download

ASTM D7504-17a pdf download

1.1 This test method covers the determination of total nonaromatic hydrocarbons and monocyclic aromatic hydrocar-bons in benzene, toluene, ethylbenzene, p-xylene, o-xylene, styrene and mixed xylenes by gas chromatography. The purity of benzene, toluene, ethylbenzene, p-xylene, o-xylene, styrene and mixed xylenes is also calculated. Similar test methods,using the internal standard calibration technique and the external standard

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