1、flIL-N-LI767 (3) 68 W 7797706 OL21233 W c3 - 75- 7q MIL-M-48767 (AR) AMENDMENT 3 1 November 1983 SUPERSEDING AMENDMENT 2 17 December 1979 MILITARY SPECIFICATION METHYL FORMATE (FOR USE IN AMMUNITION) This Amendment forms a part of Military Specification MIL-M-48767(AR), dated 19 June 1975, and is ap
2、proved for use by the US Army Armament Munitions and Chemical Command, and is available for use by all Departments and AGencies of the Department of Defense. PAGE 1 Del ete (PA) I wherever it appears and substitute I (AR) l. Delete the Preamble and substitute the following: “This specification is ap
3、proved for use by the US Army Armament Munitions and Chemical Command and is available for use by all Departments and Agencies of the Department of Defense“. PAGE 2 * 3.1.3 Purity. Delete this table in its entirety and substitute the following: mpu r i t y Maximum Limit, ppm Water 100 Methanol 100 D
4、imethyl Ether 50 Formic Acid 50 Halogens: Total Impurities 150“ Inorganic Halogen 20 Organic; Halogen 30 PAGE 3 4.4.2 Testing. To end of sentence, add the following: “at a Relative Humidity not to exceed 4% at ambient conditions,“ 1 of 4 FSC 6810 THIS DOCUMENT ONTAlNS PAGES. Provided by IHSNot for R
5、esaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-48767 (3) 68 m 7777906 OL2L234 T m MIL -14- 4 8 7 6 7 (AR) AMENDMENT 3 4.4.2.1 Sampling. At the end cf the second sentence add the following: “or the sample from each batch that is combined into a shipping lot shall be s
6、ubjected to the tests listed below in accordance with MIL-STD-105, Level II.“ Delete Inspection/Requirements table and substitute the following table: “I nspec ti on/Requi remen t Defect Classification Form (see 3.1.1) Major Infrared Spectroscopy (see 3.1.2) Major Purity (see 3.1.3) Major“ Inorganic
7、 Halogens Organic Halogens Water Methanol Dimethyl Ether Formic Acid Total Impurities PAGE 4 4.4.3.3.2 After “Other Impurities“ add the following: I (Not Including Halogens)“ 4.4.3.3.3 Halogen. Delete in its entirety and substitute the following: “4.4.3.3.3 Halogen determination. 4.4.3.3.3.1 Inorgan
8、ic halogen. The procedure outlined below is the Turbidimetric analytical technique. The colorimetric or nephelometric standard analytical techniques may also be used. a. Equipment for Turbidimetric method. (i) Turbidimeter (Hach Chemical Model 2100A or equivalent). (2) Reagents: Sodium Chloride solu
9、tion (5 pg/ml) Silver nitrate solution (5%) Nitric Acid (concentrated) b. Procedure for turbidimetric method: (i) Make up standard halogen solutions as follows: 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-48767 (3) 68 7777906 0121235 1 MI
10、L-M-48767 (AR) AMENDMENT 3 Place O, I-, 2, and 3 ml of 5 ag C1 /ml sodium chloride solution respectively into four 50 ml flasks, each of which contains 1 ml of concentrated HNO3 and 1. ml of 5% AgN03. Fill up to the mark with water, shake well, let them age in a dark place for 1.0 minutes, and measu
11、re turbidity. Plot a standard curve of halogen concentration against turbidity. (2) In a beaker, dissolve 0.5 ml of methyl formate in 15 ml. of water. (3) In a separate container, make up a solution of diluted nitric acid using 27 ml nitric acid and 9 ml water. (4) Transfer the methyl formate soluti
12、on to a 50 ml volumetric flask and rinse the beaker with three 11 ml portions of the nitric acid solution. Add the rinsings to the volumetric flask. The total volume of solution will now be approximately 48 ml. (5) Measure turbidity, and use this as the blank value. The turbidity of this solution is
13、 normally as low as that of deionized water. (6) Add 1 ml of 5% AgNO3 to the flask, and fil1 to the 50 ml mark with water. (7) Shake well and let stand in a dark place for 10 minutes. (8) Measure turbidity and determine the total halogen cntent by using the standard curve. 4.4.3.3.3.2 Organic ha1 og
14、en. a. Equipment: (1) Gas chromatograph (Hewlett-Packard 5840A or equjvalent) . (2) Detector - Flame Ionization (FID) or Electron Capture (3) Column - Silicone Gum Capillary (Hewlett-Packard SE54 (ECD). I or equivalent). NOTE: Stainless steel column, OV-101 (6 meters length, 1/8 inch diameter) may a
15、lso be used. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-* MIL-M-4 87 6 7 (AR) AMENDMENT 3 b. Gas chromatograph conditions: (1) Detector temperature: 29OoC (2) Column temperature: 40C (3) Carrier gas: Helium at 60 ml/min. (4) Injection temperat
16、ure: 29OoC. (5) Sample size: 1 pl. c. Procedure: (i) Inject 1 pl of methyl formate (2) Compare the peak area with knwn standards for quantitative analysis, and identify any unknown peaks.“ PAGE 5 6.4 Add the following source of supply: “Tedia Company 2940 Symmes Road Box 342 Fairfield, Ohio 54014“ T
17、he margins of this amendment are marked with an asterisk to indicate where changes (additions, modifications, corrections, deletions) from the previous amendment were made. This was done as a convenience only and the Government assumes no liability whatsoever for any inaccuracies in these notations.
18、 Bidders and contractor-s are cautioned to evaluate the requirements of this document based on the entire content irrespective of the marginal notations and relationship to the last previous amendment. Cus tod i an : Army-AR Pr epar i ng act i vi ty : Army-AR (Project 68104332) *U.S. GOVERNMENT PRINTING OFFICE 1983 - 705-040/6722 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
