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Significance and Use
4.1 This practice provides for the processing of liquid samples obtained in accordance with Practice F302 and Practices F303. It will provide the optimum sample processing for visual contamination methods such as Method F312, and Test Method F314.
1.1 This practice covers the processing of liquids in preparation for particulate contamination analysis using membrane filters and is limited only by the liquid-to-membrane filter compatibility.
1.2 The practice covers the procedure for filtering a measured volume of liquid through a membrane filter. When this practice is used, the particulate matter will be randomly distributed on the filter surface for subsequent contamination analysis methods.
1.3 The practice describes procedures to allow handling particles in the size range between 2 and 1000 μm with minimum losses during handling.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D287 Test Method for API Gravity of Crude Petroleum and Petroleum Products (Hydrometer Method)
D1078 Test Method for Distillation Range of Volatile Organic Liquids
D1193 Specification for Reagent Water
D1353 Test Method for Nonvolatile Matter in Volatile Solvents for Use in Paint, Varnish, Lacquer, and Related Products
D1836 Specification for Commercial Hexanes
D2021 Specification for Neutral Detergent, 40 Percent Alkylbenzene Sulfonate Type
F302 Practice for Field Sampling of Aerospace Fluids in Containers
F303 Practices for Sampling for Particles in Aerospace Fluids and Components
F312 Test Methods for Microscopical Sizing and Counting Particles from Aerospace Fluids on Membrane Filters
ICS Number Code 49.035 (Components for aerospace construction)