MIL-DTL-52701C
3.2 Standard sample. A standard sample of indicator solution will be supplied by the
Government on request by a potential bidder. The standard sample will be furnished only to
show the potential bidder the color (obtained when 0.5 milliliter (mL) of standard sample is
added to 15 mL of each buffer solution prepared in accordance with 4.2.2) that the indicator
solution he proposes to furnish must produce (see 6.4).
3.3 Material. Material shall be as specified herein. Material not specified shall be
selected by the contractor and shall be subject to all provisions of this specification.
3.3.1 Suspended matter and foreign material. Total suspended matter and foreign
material shall not exceed 10 mg/L when tested per 4.2.1. When specified (see 6.2), the
contractor may certify that the indicator solution has been filtered through Whatman grade
934AH and 984H, Gelmen type A/E, Millipore type AP40, or equivalent glass fiber filters prior
to packaging.
3.4 Government-loaned property. Unless otherwise specified (see 6.2), the following
property conforming to MIL-D-537, type I, class 8, in the quantities indicated will be loaned by
the Government (see 6.3):
Item No.
Description
Quantity
1
Disk, master color standard, medium values, pH 3.0 to 11.0
1
2
Disk, master color standard, low values, pH 3.0 to 11.0
1
3
Disk, master color standard, high values, pH 3.0 to 11.0
1
4
Disk evaluator
1
4. VERIFICATION
4.1 Sampling. Sampling shall be accordance with MIL-STD-1916, verification level II or
as specified in the acquisition document (see 6.2).
4.2 Tests.
4.2.1 Suspended matter foreign material. Unless otherwise specified, samples selected in
accordance with 4.1 shall be tested for suspended matter and foreign material in the solution in
accordance with APHA "Standard Methods for the Examination of Water and Wastewater",
section 209c "Total Suspended Solids dried at 103 - 105ºC". See 3.3.1 for limits of suspended
matter and foreign material.
4.2.2 Color. Buffer solutions of pH 3.0 to 11.0 inclusive in increments of 1 pH shall be
prepared in accordance with NBS Research Paper 2619. 0.50 mL of indicator shall be added to
15 mL of each buffer solution. The mixtures shall be compared for color with the Government-
loaned low, medium and high master color standard disks. The color of each pH mixture shall
be visually in the range of color of the low and high master color standard disks as per 3.1.
3
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