1、MIL-L-48708 (AR) AMENDMENT 3 14 November 1983 SUPERSEDING AMENDMENT 2 17 December 1979 - 1 MILITARY SPECIFICATION LITHIUM RESERVE BATTERY ELECTROLYTE This Anendment forms a part of Military Specification MIL-L-48768 (AR), dated 19 June 75, ancl is approved for use by the US Army Armament Munitions a
2、nd Chemical Command, and is available for use by all Departments and Agencies of the Department of Defense. PAGE 1 Delete I (PA) I wherever it appears and substitute I (AR) I. Delete the Preamble and substitute the following: “This specification is approved for use by the US Army Armament Munitions
3、ar.d Chemical Command and is available for use by all Departments and Agencies cf the Department of Defense.“ PAGE 2 3.2 Properti.es. Delete table I in its entirety afid substitute the-fiTEkTk : “Takle I P r Oper ty _I_ - Applicable Par a9 r aph - - - - Reguirement - Color Clear & Colorless Specific
4、 Gravity at 1.2850 to 1.3150 Purity to Pale Yellow 25.0 - + 1.0 C Water, ppm, max. 150 Methanol, ppm, max. 300 Formic Acid, ppm, max. 100 Dimethyl Ether, ppm, max. 100 Halogens: Inorganic Halogens, ppm, max. 30 Organic Halogens, ppm, max. 30 4.4.3.1 4.4.3.3 4.4.3.5 4.4.3.6 4.4.3.6 4.4.3.6 4.4.3.11.1
5、 4.4.3.11.2 FSC 6810 1 of 6 THIS DOCUMENT CONTAINS - b? PAGES. .J ./ Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-L-48768 (AR) AMENDMENT 3 Table I (C0ntinue.d) Total Impurities, ppm, max. 500 pH at 25O + 2OC 2.8 - 6.5 Specific Conductance mmho
6、/cm at 25O - + l.OC 39 to 46 Diffusion Current, Microamps 20 PAGE 3 Applicable P ar ag r aph 4.4.3.6 4.4.3.9 4.4.3.10“ - - - 3.2 -m- First article testing. Correct paragraph number “3.2“ to “3.3 . PAGE 4 4.3.1 -_-_- Submission. Delete “1 gallon“ and substitute “1 liter“. 4.4.2 - Testing. “fat a rela
7、tive humidity not to exceed 4% at ambient conditions)“. At the end of the sentence add the following: * 4.4.2.1: -.- Samsling. - Delete the table shown in its entirety and substitute the Delete “2 liters“ and substitute “500 mL“. following: “Table II. Classification of defects I-_-_-_-_- Reauirement
8、 Defect P ar aq r aph Classification - _-_- Tes t/Exami na ti on - - - Color 3.2 Specific gravity 3.2 Purity 3.2 Total impurities 3.2 D i f f us ion cur rent 3.2 Specific conductance 3.2 Major Major Major Major Major Major“ 4.4.3.2 _-_-_-_- Insoluble matter. Delete this paragraph in its entirety. 2
9、Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-L-47b (3): b 7777906 03232q5 MIL-L-48768 (AR) AMENDMENT 3 PAGE 5 * 4.4.3.3.3 - Equipment. - Delete in its entirety and substitute the following: “Eauipment an? materials. _A_ _- a. Two calibrated py
10、cnometers fitted with rubber stcppers. b. 25 cc syringe fitted with needle. c. Controlled temperature chamber: 25OC - + 1.OQC. ir. Solution to be tested.“ 4.4.3.3.2 -I- Procedure. Delete temperature “25 2 O.IC“ and substitute “25 - + l.OC“. PAGE 6 4.4.3.4 Viscosity. - Delete this paragraph in its en
11、tirety. 4.0.3.6: Methanol. Delete “wood“ and substi tute “wool“, c- Delete “20“ and substitute “30“. PAGE 7 4.4.3.7 _c_- Refractive index. Delete this paragraph in its entirety. 4.4.3.8 E. Delete in its entirety ar.d substitute the following: “4.4.3.8 pH. Determine the pH of the electrolyte in accor
12、dance with method ASTM-E70 at 25 + 2OC except that electrolyte shall be diluted in the ratio of one part electrolyte to nine parts cf baile? distilled water. Measure pH within 3 minutes following preparation of solution.“ 4.4.3.10 kecific -_-_-_- conductance. Delete llO.l“ an8 substitute “1.0“. 4.4.
13、3.10.1: Equipment. Delete “10,000 Hertz“ and substitute ir=- 1OKH e r t z . In procedure, third sentence after “separate read.ings“ and before “in ohms, insert “per cell“. Also, add the following: “Record three (3) separate readings per cell.“ 3 Provided by IHSNot for ResaleNo reproduction or networ
14、king permitted without license from IHS-,-,-MIL-L-Ll7b (3) 68 W 999990b OL2L24b b W MIL-L-48768 (AR) AMENDMENT 3 * 4.4.3.11 Delete in its entirety and substitute the following: “4.4.3.11 -_- Halogen _-_-_-_- determination. 4.4.3.11.1 _-_ Inorganic - halogen. - The procedure outlined below is the Tur
15、bidimetric analytical technique. The colorimetric or nephelometric standard acalytical techniques may also be used. a. Equipment for Turbidimetric techniuue: (i) Turbidimeter (Hach Chemical Model 2100A or equivalent). (2) Reagents: Scdium Chloride Solution (5 ,fig/ml) Silver Nitrate Solution (5%) Ni
16、tric Acid (concentrated) b. Procedure for turbidimetric method: (1) Make up standard halcgen solutions as follows: Place O, 1, 2 and 3 ml of 5,4g/ml sodium chloride solution respectively into four 50 ml flasks, each of which contains 1 ml of concentrated “O3 and 1 rr.1 of 5% AgN03. mark with water,
17、shake well, let them age in a dark place for 10 minutes, and measure turbidity. Plot a standard curve of halogen concentration against turbidity. ml of water. Fill up to the (2) In a beaker, dissolve 0.5 ml of methyl formate in 15 (3) In a. separate container, make up a sclution of diluted nitric ac
18、id using 27 ml nitric acid and 9 ml water. (4) Transfer the methyl formate solution to a 50 ml volumetric flask and rinse the beaker with three 11 nl portions of the nitric ocid sclution. Add the rinsings to the volumetric flask. The total volume of solution will now be approximately 48 mi. (5) Meas
19、ure turbidity, ar?d use this as the blank value. The turbidity of this solution is normally as low as that cf Seionized water. fe) Add 1 ml of 5% AgN03 to the flask, an3 fill to the 50 ml mark with wster. (7) Shake well and let stand in a dark place for 10 minutes. (8) Measure turbidity and determin
20、e the total halogen ccntent by usina the standard curve. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NIL-L-487bB (3) 68 m 7777706 0323247 B m MIL-L-4 8 76 8 (AR) AMENDMENT 3 4.4.3.11.2 a. Euuipment: _- Organic - halogen. - fi) Gas chromatograph
21、 (Hewlett-Packard 5840A or euuivalent) . (2) Detector - Flame Ionization (FID) or Electron Capture 1ECD) . (3) Install glass injection port liner between septum and column inlet. (4) Column - Silicone Gum Capillary (Hewlett-Packard SE54 or euuivalent) . NOTE: Stainless steel column, OV-101 (6 meters
22、 length, li8 inch diameter) may also be used. b. Gas chromatograph conditions: fi) Detector temperature: 29OoC. (2) Column temperature: 4OoC. (3) Carrier gas: Helium at 60 ml/min. 14) Injection temperature: 29OoC. (5) Sample size: 1 ,411. c. Procedure: !i) Inject 1 ,t.l of electrolyte. fi) Compare t
23、he peak area with the known standards for uuantitative analysis, and identify any unknown peaks. (3) Change glass injection port liner prior to each samp in jec tim. 4.4.3.11.3 - Organic _- Haloqen. - Alternate procedure. a. Equipment: (i) Gas chromatograph (Hewlett-Packard 5840A or eauivalent) . E
24、J le Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-L-48768 (AR) AMENDMENT 3 (2) Detector - Flame Ionization (FID) or Electron Ca.pture (ECD) . (3) Column - Silicone Gun Capillary (Hewlett-Packard SE54 or eauivalent) . NOTE: Stainless steel colu
25、mn, OV-101 (6 neters length, 1/8 inch diameter) may also be used. b. Ga.s chromatograph conditions. The GC conditions shall be the seme as those specified in 4.4.3.11.2, Section b. c. Procedure: (1) Distill approximately 1.5 ml cf electrolyte to separate the volatile components from the non-volatile
26、 components. (2) Inject 1 ,kl of distilled volatile component. (3) Compare the peak area with the known standarcs for uuantitative analysis, and identify any unknown peaks.“ PAGE 8 * 6.2 Delete “ATTN: CARPA-CA-A-P, Picatinny Arsenal“ from address given and substitute “ATTN: DRSMC-QAR-R(D)“. I1 6.5 _
27、-_- Handling - and storage. - After “room temperature“ add “or lowerT. The marains of this amendmefit are marked with an asterisk to indicate where changes (additions, modifications, corrections, $eletj.ors) from the previous amendment were made. This was done as a convenience only and the Governmen
28、t assumes no liability whatsoever for any inaccuracies in these notations. Bidders and contractors are cautioned to evaluate the requirements of this document based on the entire content irrespective of the marginal notaticns and relationship to the last previcus amendment. Cus tod i an: Army-AR Q US. GOVERNMENT PRINTING OFFICE: 1984-705-040IA1347 6 Preparing activity: A rmy-AR (P roj ec t 68 10-AB 3 3 ) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
