MIL-STD-1330D(SH)
w/ Change 1
5.13.2.5 Solvent extract non-volatile residue. Non-volatile residue (NVR) of solvent extract shall be determined in accordance with ASTM F331 (see 6.3). This method evaporates 500 mL of solvent to 20 to 30 mL using a rotary flash evaporator, evaporates the 20 to 30 mL residue with a 105 to 110 °C oven, cools the sample, and then weighs the remaining residue, recording the NVR in ppm. Because of the volume, expense, and effluent discharge associated with the solvent NVR analysis, activities should implement methods to collect and recycle evaporated solvent.
5.13.2.6 Solvent non-volatile residue. Non-volatile residue (NVR) of solvent shall be determined in accordance with NAVSEA ST700-F1-PR0-010, Appendix E, or ASTM D2109, method A (see 6.3). NAVSEA ST700-F1-PR0-010, Appendix E, was developed for instruments that have a smaller sample size of 100 mL.
5.13.2.7 Solvent optically stimulated electron emission. Residue in solvent shall be determined in accordance with Appendix D.
5.13.2.8 Solvent infrared spectrophotometry. Hydrocarbon oil and grease in trichlorotrifluoroethane (CFC-
113) shall be determined in accordance with ASTM D3921 (see 6.3).
5.13.2.9 White light visual clarity inspection. Samples shall be visually inspected for clarity. Inspections shall be performed by a person with normal visual acuity, natural or corrected, under bright white light of at least 100
foot-candles. A general purpose, two D-cell flashlight in good condition, at a distance of no greater than 18 inches directly above a surface will illuminate the surface with an intensity of not less than 100 foot-candles. Samples shall
be inspected in a chemically compatible clear container, or clean white dish. Any visible turbidity from contaminants such as oil, grease, sediment, paint chips, bead blast, or resin beads shall be cause for rejection.
Evidence of not greater than 3 particles is acceptable.
5.13.3 Particulate inspection methods.
5.13.3.1 Applicability. Unless otherwise specified, a white light visual particle inspection as specified in
5.13.3.2 shall be performed on a sample of the final rinse water or solvent. For critical applications, a particle count as specified in 5.13.3.3 shall be performed on a sample of the final rinse water or solvent.
5.13.3.2 White light visual particle inspection. Samples of final rinse water or solvent shall be visually inspected for particulate contamination. Inspection shall be performed by a person with normal visual acuity,
natural or corrected, under bright white light of at least 100 foot-candles. A general purpose two D-cell flashlight, in good condition, at a distance of not greater than 18 inches directly above a surface will illuminate the surface with an
intensity of not less than 100 foot-candles. Samples shall be inspected in a chemically compatible clear container or
clean white dish. Any visible particles shall be cause for rejection. This visual inspection corresponds to a quantitative limit of no particles greater than 50 micrometers.
5.13.3.3 Particle count. Particle counts of final rinse water or solvent samples should meet IEST-STD-CC1246 cleanliness level 100 or 200 when determined in accordance with ASTM F311 (see 6.3). A particle count is determined by filtering a sample of rinse water or solvent through a 1.0 micrometer, or less, membrane filter. The size and quantity of particles on the filter is then determined using a microscope. The particle count should be reported in relation to a known volume (1 liter) or surface area [1 square foot (ft2)] using the appropriate IEST-STD- CC1246 cleanliness level distribution. Note that the analysis should be performed in a clean environment to prevent contamination. 0ne alternative to simplify the particle count is to look for a particle larger than the largest particle size allowed to have an unlimited quantity. As an example, if the largest particle size allowed to have an unlimited quantity is 50 micrometers, look only for particles greater than 50 micrometers. A complete particle count would be required only if particles greater than 50 micrometers were observed.
5.13.4 pH analysis.
5.13.4.1 Applicability. When specified, the pH of rinse water shall be determined as specified in 5.13.4.2. The pH of N0C should be determined as specified in 5.13.4.3.
5.13.4.2 Rinse water pH. When specified, the pH of rinse water shall be determined using a pH probe, litmus paper, or phenolphthalein indicator solution. Three drops of phenolphthalein indicator solution in a 100 mL sample will appear colorless or a very slight pink when the pH is 8.0 or less.
37
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business