MIL-STD-1330D(SH) APPENDIX C
w/ Change 1
TEST PROCEDURE FOR SOLVENT EXTRACTION OF AN AQUEOUS INORGANIC CLEANER C.1 SCOPE
C.1.1 Scope. This appendix is a mandatory part of the standard. The information contained herein is intended for compliance. This appendix provides a procedure for solvent extraction of inorganic aqueous Navy oxygen cleaner (NOC) or tri-sodium phosphate (TSP) cleaning solution. The solvent extract is subsequently analyzed for hydrocarbon oil and grease or non-volatile residue.
C.2 APPLICABLE DOCUMENTS
This section is not applicable to this appendix. C.3 PROCEDURE
C.3.1 Summary of test method. The solvent extraction is performed by serially extracting a 500 mL homogenized sample of NOC or TSP with three 160 mL volumes of CFC-113 or HCFC-225 if analyzing for non- volatile residue (NVR) by gravimetric, or serially extracting a 100 mL homogenized sample of NOC or TSP with three 30 mL volumes of CFC-113 solvent if analyzing for hydrocarbon oil and grease by infrared spectrophotometry. Extracts analyzed for NVR are subsequently diluted to 500 mL, while extracts analyzed for hydrocarbon oil and grease by infrared spectrophotometry are subsequently diluted to 100 mL.
C.4 Significance and use.
C.4.1 NOC in accordance with MIL-DTL-24800 and TSP in accordance with O-S-642 are aqueous inorganic solutions that generally contain less than 1 ppm solvent extractable material. NOC and TSP remove industrial oils and greases by displacement with the resultant removed insoluble contaminants existing as a suspension. When mixed with a solvent, the solvent extracts the oil and grease for post hydrocarbon oil and grease or NVR analysis depending upon the solvent used. Since HFE-7100 has marginal hydrocarbon solvency, it cannot be used for extraction.
C.4.2 All NAVSEA halogenated solvents are denser than NOC or TSP solutions so the solvent will settle to the bottom of a separatory funnel during an extraction process.
C.4.3 This test method does not acidify the NOC aqueous sample to a pH of 2 or less like common waste water analyses. Soluble organic materials that would be detectable when acidifying to a pH of 2 are easily detected as a stable foam when performing the shake test as specified in 5.13.2.2.
C.4.4 The homogenizing process cleans oil and grease from the sides of the sample container and equally distributes insoluble oil and grease through the sample as a fine emulsion. This ensures that samples drawn from the original 500 to 600 mL sample are representative.
C.4.5 During the extraction process, small quantities of aqueous cleaner solution will be captured by the solvent. The non-volatile inorganic constituents of the captured aqueous cleaner can interfere with subsequent NVR analyses. This interference can be avoided by establishing a baseline NVR analysis of the aqueous cleaner.
C.5 Apparatus.
a. Laboratory homogenizer with 500-1000 watt motor power with a no load speed control of 10,000 to 30,000 revolutions per minute (rpm), and a 20 millimeter diameter saw-tooth generator capable of homogenizing a 1 liter sample into a 1-5 micrometer emulsion at about 7,500 rpm loaded speed. Suitable homogenizers and generators are available from Omni International Inc., 6530 Commerce Court, Gainesville, VA (800)776-4431, homogenizer part number GLH-115 and generator part number G20-195ST; or PRO Scientific, PO Box 448, Monroe, CT (203)452-
9431, homogenizer part number 01-01250 and generator part number 02-20200. A holder or stand for the homogenizer is recommended.
57
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business