1、 MIL-E-82898 (1) 0b 2083383 T2b j INCH-POUND 1 MIL-E-82898( NAVY) AMENDMENT 1 26 January 1999 MILITARY SPECIFICATION EXPLOSIVE, PLASTIC-BONDED, CAST PBX(AF)-108 This amendment forms a part of MIL-E-82898(NAvy) dated 30 December 1994, and is approved for use by the Deparment of the Navy, and is avail
2、able for use by all departments and agencies of the Department of Defense. MiL-E-82898(NAvy) remuins inactive for new design, however, the document is valid for acquisition when needed. Page 6 Renumber existing paragraph 4.5.5 as paragraph 4.5.5.1. Add new paragraph 4.5.5 as follows: procedure descr
3、ibed in 4.5.5.1 or the high pressure liquid chromatography (HPLC) procedure described in 4.5.5.2.“ 4.5.5 RDX composition test. The RDX content shall be determined using the wet chemistry Page 7 Add new paragraphs 4.5.5.2 through 4.5.5.2.4 as follows: “ 4.5.5.2 RDX composition test using HPLC. 4.5.5.
4、2.1 Reference preparation. a. Prepare a stock solution of HMX by accurately weighing O. 16 gram of HPLC grade HMX reference, to the nearest O. 1 mg, into a tared 100-mL volumetric flask. Add spectral grade acetone, and swirl the flask to dissolve the HMX. Dilute to volume with spectral grade acetone
5、 and mix thoroughly; b. Prepare a stock solution of RDX by accurately weighing O. 16 gram of HPLC grade RDX reference, to the nearest O. 1 mg, into a tared 100-mL volumetric flask. Add spectral grade acetone, and swirl the flask to dissolve the RDX. Dilute to volume with spectral grade acetone and m
6、ix thoroughly. c. Prepare an internal standard stock solution by accurately weighing O. 16 gram of m-dinitrobenzene, to the nearest O. 1 mg, into a tared 100-mL volumetric flask. Add spectral grade acetone, and swirl the flask to dissolve the mdinitrobenzene. Dilute to volume with spectral grade ace
7、tone and mix thoroughly. Note: The same internai standard stock solution should be used to prepare the working standard solution and the diluted sample solutions. AMSC NIA Page 1 of 3 FSC 1376 DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited. Provided by IHSNot for Re
8、saleNo reproduction or networking permitted without license from IHS-,-,- MIL-E-82898 (1) 99999Ob 2083384 962 m r- N MIL-E-82898( NAVY) AMENDMENT 1 d. Prepare the working standard by transferring 1 .O mL of the HMX stock solution, 10.0 mL of the RDX stock solution, and 5.0 mL of the internal standar
9、d stock solution to the same 100- mL volumetric flask. Dilute to volume with spectral grade acetone and mix thoroughly. This solution is to be used for analysis. Note: Each of the above solutions may be stored at 4 “C. Allow to warm to room temperature prior to use. 4.5.5.2.2 Sample preparation. a.
10、b. C. Chop the sample into cubes of approximately 0.5 cm, or smaller, on a conductive mat. Accurately weigh 2.0 grams of sample to the nearest O. 1 mg into a tared paper thimble. Perform Soxhlet extraction using 250 mL of acetone. Reflux the sample for 24 hours. After extraction, allow the extract s
11、olution to cool to room temperature. Quantitatively transfer this solution to a 250-mL volumetric flask. Dilute to volume using acetone and mix thoroughly. Transfer 2.0 mL of sample solution and 5.0 mL of internal standard to the same 100-mL volumetric flask. Dilute to volume with spectral grade ace
12、tone and mix thoroughly. This solution is to be used for analysis. 4.5.5.2.3 Chromatographic conditions and approximate retention times. a. Use the following chromatographic conditions: System: Any appropriate HPLC system equipped with a pump, injector, ultraviolet detector, and recorder or data sys
13、tem. Mobil phase: Milli-Q treated water/HPLC grade methanol (70:30) Column: Waters Radiai Pak C-18, or equivalent Flow rate: 4.0 Wmin Injection volume: 25 u1 Detection wavelength: 254 nm b. Approximate retention times. HMX = 4.0 min RDX = 8.0min Internai Standard = 25 min 2 Provided by IHSNot for Re
14、saleNo reproduction or networking permitted without license from IHS-,-,-1 I MIL-E-82898(NAVY) AMENDMENT 1 4.5.5.2.4 Percent RDXMMX calculation. a. Calculate the RDWHMX content as follows: x (100) S.R. x- 1oomL 1oomL 2.0mL wt sam, g R.R. wt ref, g 1O.OmL 1OOmL 250mL %RDX = SR 250mL x - x (100) wt re
15、f, g l.0mL 1O.OmL 1OOmL %mfX = 1oomL 1oomL 1oomL 2.0mL wtsam, g R.R. where: S.R. = ratio of sample peak area to internal standard peak area R.R. = ratio of reference peak area to internal standard peak area Total % RDX = %HMX + %RDX b. The average percent RDX of the triplicate determinations for each sample shall be within the lits specified in Table II. Review activity: Navy - AS Preparing activity: Navy-OS (Project 1376-0046) 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
