1、- - * #.i - I. MIL-L-3061B b 7777706 0334227 O m . I t t- 23 June 1969 SUPERSEDING MIL-L-3061A(NOrd) 1 June 1954 MILITARY SPECIFICATION LECITHIN (FOR USE IN EXPLOSIVES) This specification has been approved by the Naval Ordnance Systems Command, Department of the Navy. 1. SCOPE 1.1 This specification
2、 covers one grade of vegetable lecithin extracted from soybeans, for use in explosives. 1 2. APPLICABLE 2.1 The following documents of the issue in effect on date of invitation for bids or request for proposal, form a part of the specification to the extent specified herein. STANDARDS Military MIL-S
3、TD-105 Sampling Procedures and Tables for Inspection by Attributes MIL- STD- 12 9 (Copies of specifications, standards, drawings, and publications required by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting
4、officer.) Marking for Shipment and Storage 2.2 Other publications - The following documents form a part of this specification to the extent specified herein. Unless otherwise indicated, the issue in effect on date of invitation for bids or request for proposal shall apply. , i Provided by IHSNot for
5、 ResaleNo reproduction or networking permitted without license from IHS-,-,-( Al)pl jut ion lor Copi w should Itc addressed to tlic Amer*icari Soci rty fcw Testiril: and Materials, 1916 Race Street, Philadelphia, Pennsylvania 19103). American Oil Chemists Society A.O.C.S. Ter:tative Method Ja 2-46 -
6、 Moisture (Application for copies should be addressed to the American Oil Chemists Society, 35 East Wacker Drive, Chicago, Illinois 60601.) 3. IZQUIREMENTS tt. 3.1 First Article inspection - The lecithin furnished under this specifi- cation shall be a product which has been inspected and passed the
7、first arti- cle inspection specified herein. (See 4.3 and 6.2.1). - st. 3.2 Chemical and physical properties - Lecithin shall be a plastic grade and shall conform to the chemical and physical properties of Table I when tested as specified therein. I TABLE I CHEMICAL AND PHYSICAL PROPERTIES PROPERTY
8、Moisture, percent Benzene insoluble matter, percent AciG number Acetone insoluble matter, percent Lecithin, percent VALUE MINIMUM - - - 68 19.0 MAXIMUM 1. o 0.1 24 - - TEST PARAGRAPH 4.5.1 4.5.2 4.5.3 4.5.4 4.5.5 3.3 Workmanship - Lecithin shall be homogeneous, free from foreign matter, lumps, and a
9、ny oil separation on top of the material. 4. QUALITY ASSURANCE PROVISIONS I I 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- - - MIL-L-30bLB 68 m 99999Ob OLL4229 4 MIL-L-3061B(OS) 4.1 Responsibility for inspection - Unless otherwise specified in
10、the contract or purchase order, the supplier is responsible for the performance of all inspectian requirements as specified herein. specified in the contract or order, the supplier may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, u
11、aless disapproved by the Government. The Government reserves the right to perform any ofthe inspections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. Except as otherwise 4.2 Classification of inspection
12、- The inspection of the lecithin shall be classified as follows: a. First article inspection (4.3) b. Quality conformance inspection (4.4) 4.3 First article inspection - First article inspection shall consist of all the requirements and of all the tests and inspections of this specifi- cation, and a
13、ny additional inspections required by the contract or purchase order. 1 4.3.1 Sampling for first article inspection - Unless otherwise speci- fied (see 6.2.11, as soon as practicable after award of a contract or order, the supplier shall furnish a first article sample to determine conformance with t
14、his specification. pounds of lecithin manufactured by the procedure and processes and at the same location proposed by the supplier for the execution of the contract. The in 4.3. Failure of the lecithin to meet all requirements shall result in rejection of the first article sample. . will be notifie
15、d and will be authorized by the procuring-activity to pro- ceed with production. be at the suppliers risk, applied as part of the quantity specified by the contract or order. The first article sample shall consist of two sample shall be subjected to the first article inspection specified 4.3.1.1 Whe
16、n the first article sample has been approved, the supplier Any production started before such approval shall The first article sample accepted will be 4.4 Quality conformance inspection - The quality conformance inspection shall consist of all the examinations (4.4.1.3 and 4.4.2) and tests of this s
17、pecificstion with the exception of the percent lecithin (Table I and 4.5.5). requirement ;: 4.4.1 Sampling - d 4.4.1.1 Inspection lot - A lot shall consist of the lecithin produced by one manufacturer at one plant, from the same materials, and under essentially the same manufacturing conditions prov
18、ided the operation is continuous, shall constitute a lot (see 6.3). . In the event the process is a batch operation, each batch 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I 4.4.1.2 Samples for test - A random sample of filled containers shall
19、The Inspection Level shall be Sufficient quantity of sample shall be be selected in accordance with MIL-STD-105. I, and the acceptance number zero. removed from each selected container and mixed thoroughly to form a com- posite sample of approximately two pounds. The composite sample shall be placed
20、 in an air-tight container and subjected to the examinations of 3.3 and individual tests of 4.5, except lecithin (4.5.5). 3.i 4.4.1.3 Sample for examination of filled containers - A random sample of filled containers shall be selected from each inspection lot in accord- ance with MIL-STD-105. Qualit
21、y Level (AQL), 2.5 percent defective. Samples selected shall be examined to verify compliance with all requirements of this specification in regard to fill, closure, marking and other requirements not involving tests. The Inspection Level shall b II, and the Acceztance 4.4.2 Examination for oil Sepa
22、ration - Inverting the open containers selected in 4.4.1.3 shall cause no loss of liquid material. 4.5 Test methods - s?. 4.5.1 Moisture - The moisture content shall be determined in accord- ance with American Oil Chemists Society (A.0.C.S.) Tentative Method Ja2-46. 4.5.2 Benzene-insoluble matter -
23、Transfer an accurately weighed portion of approximately 10 gm of the sample to a beaker containing 100 ml of benzene. Heat the beaker and contents on a steam bath with occasional stirring until the soluble material has been completely extracted. Transfer the insoluble matter quantitatively to a weig
24、hed Gooch crucible. contents with 100 ml of benzene and aspirate until dry. 100 to 105OC for 1 hour, cool in a desiccator and weigh. Calculate the increase in weight as percent benzene-insoluble matter. Wash the crucible and Dry in an oven at 4.5.3 Acid number - Transfer an accurately weighed portio
25、n of approx- imately 10 gm of sample to a 250-ml Erlenmeyer flask containing 50 ml of benzene. Heat the flask and contents on the steam bath with occasional shaking until the sample completely dissolves. Cool the contents of the flask to room temperature, add 50 ml of cold distilled water, and shake
26、. Ad? 1 nl of 0.2-percent phenolphthalein indicator Titrate the free acid present with Nil0 sodium hydraxide solution. The Frecence of a faint pink coloration in the aqueous layer which persists after separation of the two layers shall be considered the end point. a blank determination using the sam
27、e amount of benzene, distilled water, and phenolphthalein Calculate the acid number as follows: solution to the flask. Make indicator solution as used for the sample determination. Acid number - 56.1 (V-V)N (mg. of KOH per gm. W where V = ml of NaOH solution required to titrate the acid in the sampl
28、e v = ml of NaOH solution required to titrate the acid in the blank W = wt of sample in grams N = normality of NaOH solution I 4 - - -7 1 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-L- 30613 (OS ) I 4.5.4 Acetone insoluble matter - Warn the s
29、ample to soften the product (not over 6pC) and then mix thoroughly. mixed sample into a centrifuge tube which has been previously tared with a stirring rod. Add 3 ml of petroleum ether and stir well to dissolve solu- .ble matter. Thorough mixing is essential, and will require about 15 minutes. Ad6 e
30、xactly 15 ml of acetone from a buret, mix thoroughly, and place the tube in a dish containing ice water. chilled to Oo to 5OC, to the 50 mlmark on the tube, stirring during the addition. Place in an ice-water bath at OC for 15 minutes, Centrifuge for 10 minutes at a speed sufficient to clear the sol
31、ution during this period and then decant the acetone into a 250-ml beaker which has been previously dried si: 105OC, desiccated and weighed, tube to the 50 ml mrk with acetone, stir well and repeat as above. Decant the acetone into the 250-ml beaker. Evaporate the acetone on a water bath. A stream o
32、f clear dry air may be used to facilitate the removal of the sol- vent. Dry in an oven at 105 + 2OC for one hour, cool to room temperature in a desiccator and weigh th acetone soluble matter. Accurately weigh 2 gram of well Add acetone, which has been previously Refill the centrifuge Acetone soluble
33、 matter, percent = height of acetone extract x 100 Weight of sample d Acetone insoluble matter, percent = 100 - (AtBtC) l A = Percent acetone soluble matter B = Percent moisture, from 4.5.1 C = Percent benzene insolubles, from 4.5.2 4.5.6 Lecithin - Transfer an accurately weighed sample of 2 to 3 gm
34、 Add 25 ml of alcohol and 25 ml of (1:l) Cover the beaker with a watch glass and place of material to a 150-ml beaker. hydrochloric acid solution. the beaker and contents on a steam bath for 16 hours. Remove the watch glass and evaporate the solution to about 25 ml. the beaker to a 200-ml glass-stop
35、pered separatory funnel and rinse the beaker with 50 ml of water. 50 ml of ether to the solution, stopper the funnel and shake thoroughly. Xlow the aqueous layer to separate completely and draw off the lower layer into a 250-ml beaker. Wash the ether layer twice with 20-ml portions of Cistilled wate
36、r and transfer the washings to the beaker. and contents on a steam bath in order to remove the dissolved ether, 30-percent sodium hydroxide solution until just neutral to litmus, then add 1 ml of concentrated hydrochloric acid solution. fer the filtrate to a 200-ml volumetric flask and dilute to mar
37、k with dis- tilled water. Add 25-ml of distilled water and 20-ml of a freshly prepared, filtered, sat- urated solution of Reinecke salt (“, (Cr (NH 32 ) (SCN),)*H20) in distilled water. Allow the precipitate which forms to stand for 15 minutes and fil- ter through a fine porosity fritted glass cruci
38、ble by means of suction. Wash the precipitate twice with the cold distilled water and once with absolute alcohol. Dissolve the precipitate in the crucible using 15-ml of acetone and transfer to a 50-ml volumetric flask, Wash the crucible three times with 10-ml portions of acetone, Prepare standards
39、by dissolving 0.500 gm of choline chloride, which has been recrystallized from absolute alcohol and dried in an oven at-100 to Transfer the solution in Add Transfer the rinsings to the separatory funnel. Place the beaker Ad6 Filter the colution, trans- Transfer a 25-ml aliquot of the solution to a 1
40、50-ml beaker. Dilute to mark with acetone. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-15OOC for 16 hours, in distilled water arid dilute to 500 ml in a volumetric flask. Transfer by means of pipets or a buret, 5-, lo-, 15-, and, 20-ml portions o
41、f this standard solution to 150-ml beakers. tilled water and 20 ml of the Reinecke salt solution and proceed as directed for the sample. Compare the sample with the standards by means of photo- electric colorimeter using a filter which transmits light in the range of 500 to 550 u) or any other instr
42、ument which will give similar results. Calculate the percent lecithin as follows: Percent lecithin = 557.2A Add 25 ml of dis- U I , .* 6 where A = gm of choline chloride present in sample determined by compari- W = gm of sample contained in the aliquot. son with standards 4.6 Rejection criteria - If
43、 a sample fails to meet any of the test or examination requirements of this specification, or if the sample of filled containers exceeds the specified AQL (see 4.4.1.31, the lot represented shall be rejected. fr “ 5. PREPARATION FOR DELIVERY 5.1 Packing - 5.1.1 Levels A and B - Not applicable 5.1.2
44、Level C - The lecithin shall be packed in substantial commercial containers of the type, size, and kind commonly used for the purpose, con- structed so as to insure acceptance and safe delivery by common or other carriers, at the lowest rate, to point of delivery specified in the con- tract or purch
45、ase order. 5.2 Marking - In addition to any special marking required by the con- - -t-C - c- or order, shipping containers shall be marked in accordance with the recuirements of MIL-STD-129. 6. NOTES 6.1 Intended use - Lecithin furnished under the requirements of this . specification is used in form
46、ulations to emulsify and desensitize explosives. fi 6.2 Ordering data - Procurement documents should specify the following: a, Title, number and date of this specification b. Quantity 2n pounds. 6.2.1 Contracts or orders should specify the following provisions for first article inspection. PROBLEM H
47、A Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- - MIL-L-30bLB 68 I 977770b OLL9233 b I * b. 2.k. 3 Wtir!tliriJi f irloi articlr? in:iwcLion is Pqilircd - When a contractor in jri co:itinu:; production from contract to contract, Consideration shoul
48、d be given to waive the first article inspection. is required, indicate: If first article inspection a. here the first article inspection is to be conducted (at the suppliers or Government plant). b. That approval of first article samples or the waiving of the first article inspection shall not reli
49、eve the contractor of his obligation to fulfill all other requirements of this specification and contract. 6.3 Batch - A batch is defined as that quantity of material which has been manufactured by some unit chemical process and subjected to some phy- sical mixing operation intended to make the final product substantially uniform. 6.4 Supersession data - The lecithin furnished under this specifica- tion may be completely interchan
