ASTM D1655 PDF

Specification D is directed at civil applications, and maintained as such, but may be adopted for military, government or other specialized uses. Guidance information for these other applications is available in the appendix. However, this specification does not define the quality assurance testing and procedures necessary to ensure that fuel in the distribution system continues to comply with this specification after batch certification. Certain equipment or conditions of use may permit a wider, or require a narrower, range of characteristics than is shown by this specification.

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More E The ongoing validation of estimates produced by analysis of unknown samples using the calibration model should be covered separately see for example, Practice D Near-infrared spectroscopy is widely used for quantitative analysis. Many of the general principles described in these practices relate to the common modern practices of near-infrared spectroscopic analysis.

While sampling methods and instrumentation may differ, the general calibration methodologies are equally applicable to mid-infrared spectroscopy. New techniques are under study that may enhance those discussed within these practices. Users will find these practices to be applicable to basic aspects of the technique, to include sample selection and preparation, instrument operation, and data interpretation. Scope 1. The user is cautioned that typical and best practices for multivariate quantitative analysis using other forms of spectroscopy may differ from practices described herein for mid- and near-infrared spectroscopies.

Definitions, terms, and calibration techniques are described. Criteria for validating the performance of the calibration model are described. In addition, it assumes that, at the times of calibration and of validation, the analyzer is operating at the conditions specified by the manufacturer.

The practices outlined cover the general cases for coarse solids, fine ground solids, and liquids. All techniques covered require the use of a computer for data collection and analysis. While these surrogate methods generally make use of the multivariate mathematics described herein, they do not conform to procedures described herein, specifically with respect to the handling of outliers.

Surrogate methods may indicate that they make use of the mathematics described herein, but they should not claim to follow the procedures described herein. No other units of measurement are included in this standard. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

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ASTM D1655

More E The ongoing validation of estimates produced by analysis of unknown samples using the calibration model should be covered separately see for example, Practice D Near-infrared spectroscopy is widely used for quantitative analysis. Many of the general principles described in these practices relate to the common modern practices of near-infrared spectroscopic analysis. While sampling methods and instrumentation may differ, the general calibration methodologies are equally applicable to mid-infrared spectroscopy.

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Jet Fuel Specifications

While pure kerosene was once used to power the turbine engines of jet engines, jet fuel, which could be called an enhancement or adjustment of kerosene or kerosine, as it is sometimes called in industrial or scientific usage , remains the means of powering commercial airliners and some other types of aircraft. Aviation turbine fuel is a complex mixture composed mainly of hydrocarbons, but its exact structure varies depending on crude source and manufacturing processes used in its conception. For this reason, it is impossible to define the exact composition of jet fuel. ASTM Da covers the use of purchasing agencies in formulating specifications of aviation turbine fuel under contract.

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