MIL-PRF-3122J
LOT SIZE (SQFT)
SAMPLE SIZE
Up to 25,000 sq. ft.
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4.4 Fungicide.
4.4.1 TCMTB. Testing to determine the concentration of Busan 30 L in the leather shall be
conducted by using Buckman Laboratories standard test method for 2- (Thiocyanomethylthio)
Benzothiazole Analysis of Leather by HPLC. This method may be obtained by contacting
Buckman Laboratories at 1256 North McLean Blvd., Memphis, TN 38108 (800) 282-5626.
4.4.2 Ortho-phenyl phenol. Testing to determine chemical concentration in leather shall be
conducted in accordance with Test I, Type I of the MIL-L-8067 specification.
4.4.3 Diiodomethyl para Tolylsulfone. The chemical concentration in the leather shall be
conducted using the High Pressure Liquid Chromatography (HPLC) test method as follows:
4.4.3.1 Grinding. Grind the leather according to paragraph 6.3.7 of ASTM Method D2813
Standard Practice for Sampling Leather for Physical and Chemical Tests.
4.4.3.2 Stock Standard Preparation. Weigh accurately approximately 100mg of Diiodomethyl-
para-tolylsulfone Internal Reference Standard (IRS), into a 100ml volumetric flask. Add
approximately 50ml of acetonitrile, stopper and sonicate to aid dissollution (about 1 minute).
Dilute to volume with acetonitrile.
4.4.3.3 Working Standards Preparation. Transfer 3ml aliquots of the Stock Standard
Preparation in to 25, 50, 100, and 250ml volumetric flasks. Dilute to volume with acetonitrile.
These standards contain approximately 12, 30, 60 and 120ppm of Diiodomethyl-para-
tolylsulfone.
NOTE:
(1) A lower standard may be required for samples containing very low levels of
Diiodomethyl para tolylsulfone.
(2) Solutions must be stored in darkness to prevent degradation. Minimize exposure to
light during preparation and use. The Standard Preparations may be retained one month.
(3) Internal Reference Sample (IRS) is available from Chemtan Company, Inc.,
P.O. Box C, Exeter, NH 03833 Tel.: 603-772-3741.
4.4.3.4 Sample preparation. Accurately weigh approximately 3 to 5g of sample into a 150ml
beaker. Add 75-100ml of acetonitrile. Cover samples with parafilm; mix 16 to 24 hours on
magnetic stir plate. The following day, allow samples to settle; remove necessary amount of
acetonitrile and inject Note: Samples may have to be diluted further to fall within standard
curve.
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