ARMY A-A-59339-1998 GUANIDINE NITRATE《硝酸盐》.pdf
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1、 A-A-59339 9018054 0003356 03b METRIC A-A- 5 93 3 9 September 15, 1998 SUPERSEDING MIL-G-63431 (AR) September 15, 1981 COMMERCIAL ITEM DESCRIPTION GUANIDINE NITRATE The General Services Administration has authorized the use of this commercial item description, for all federal agencies. 1. SCOPE. Thi
2、s CID covers the general requirements for Guanidine Nitrate (GN) used in military explosives. 2. SALIENT CHARACTERISTICS. 2.1 Properties. The GN shall meet the requirements in Table I when tested in accordance with the applicable paragraphs. The quantity shall be as specified in the contract or orde
3、r (see 6.2). 2.2 Granulation. The GN shall be a white, free flowing material which is free from dirt, oil, grease, or other visible impurity and shall conform to the requirements specified herein. The GN shall have a U.S. Standard Sieve Number of 16 and the quality of material passing through the si
4、eve shall be at least 95% GN by weight. 3. QUALITY ASSURANCE PROVISIONS. 3.1 Product Conformance. characteristics of this commercial item description, confrm to the producers own drawings, specifications, standards, and quality assurance practices, and be the same product offered for sale in the com
5、mercial market. The government reserves the right to require proof of such conformance. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, US Army TACOM-ARDEC, Attn.: AMSTA-AR-QAW-E, Bld
6、g. 12, Picatinny Arsenal, NJ 07806-5000 by using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC N/A FSC 6810 The products provided shall meet the salient DISTRIBUTION STATEMENT A. Approved for public release; distribution is
7、unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-59339 m 9018054 0003357 T72 I Properties Requirements Test Paragraphs A-A-5933 9 Total Volatiles (Percent Purity (%) Ammonium Nitrate (%) Melamine (%) Ash (%) Sulfate as Na2S04 (%) Free A
8、mmonia (%) Water Insolubles (%) Temperature Rise (OC) (%) 0.8 (Maximum (Max.) 96. O (Minimum) 1.8 (Max.) 0.2 (Max.) 0.5 (Max.) 0.1 (Max.) 0.5 (Max.) 0.2 (Max.) 36 (Max.) 3.4.1 3.4.2 3.4.3 3.4.4 3.4.5 3.4.6 3.4.7 3.4.8 3.4.9 3.2 Granulation. The granulation of the GN shall be determined in accordance
9、 with method 204.1 of MIL-STD-650. Free flowing of the GN shall be determined by visual examination when the GN is poured on the nest of sieves. 3.3 Sampling. Two individual representative 2OOg samples from each batch or lot of the GN shall be obtained as specified in ASTM E300, section 25. Each sam
10、ple shall be tested independently in accordance to the applicable methods specified in 3.4. If either sample fails to meet any of the test requirements, the batch or lot shall be rejected. 3.4 Test methods. The tests used to determine compliance with the requirements stated in Table I shall be perfo
11、rmed on the GN samples obtained in 3.3. All tests given in this section shall be performed using prescribed procedures for replicate determinations given in standard analytical chemistry textbooks or in accordance with ASTM D2905. Unless otherwise specified herein, all chemicals shall be Reagent Gra
12、de or ACS Grade. 3.4.1 Total volatiles. Transfer to a tared glass-stoppered weighing bottle (or a tared aluminum can with a lid) an accurately weighed portion of approximately two grams (4) of the sample. With the stopper off, place the sample, weighing bottle and stopper in an oven at 1,OO“C to 105
13、% for three hours, remove and cool in a desiccator, and weigh. Calculate the loss in weight as percent total volatiles as follows: Percent total volatiles = A-B (100) A Where : A = Weight of specimen before drying (9) B = Weight of specimen after drying (9) 3.4.2 Purity. 3.4.2.1 Preparation of preci
14、pitation/waching solution. Add 7.5g of reagent qrade picric acid, 0.075g of reagent grade GN, and 8 milliliters (mL) of concentrated ammonium hydroxide to a 1000mL volumetric flask. Add 5OOmL of distilled water to the flask and mix thoroughly. Fill the flask with distilled water to the calibration m
15、ark and allow to stand for approximately 10 days before use. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- A-A-59339 m 90L8054 0003358 909 m A-A- 5 9 3 3 9 b 3.4.2.2 Procedure. Weigh 0.2g of reagent grade GN into a 250mL flask. Add 15mL distille
16、d water and 5 to 10 drops concentrated ammonium hydroxide. Heat the flask and contents on a hot plate until the GN dissolves. Remove the flask from the hot plate and allow it to cool to room temperature and filter through filter paper. To the filtrate slowly add 100mL of the precipitation solution p
17、repared in 3.4.2.1 to the GN solution while continually swirling the flask. Allow the solution to stand 8 to 12 hours at room temperature, then filter through a porcelain filtering crucible, of fine porosity, which is attached to a vacuum system containing a crucible holder and filtering flask. Rins
18、e the flask with portions of the precipitating/washing solution. Wash the precipitate with the washings in the flask. Evacuate the crucible to dryness. Dry the filtering crucible and contents to a constant weight in a drying oven at 105OC + SOC. Cool the filtering crucible and contents in a desiccat
19、or and weigh. Calculate the value of the GN to guanidine picrate factor (A) as follows : A = C (D) 100 (B) Where : A = GN to guanidine picrate factor B = Weight of precipitate in crucible (9) C = Weight of sample used (9) D = Purity of GN reagent in percent (%) 3.4.2.3 GN purity determination. Repea
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