MIL-STD-1330D(SH) APPENDIX D
w/ Change 1
D.9 5 ppm equivalent laboratory standard.
D.9.1 Preparation. All laboratory standards shall be prepared, analyzed, and packaged by a certified laboratory. Puget Sound Naval Shipyard and Intermediate Maintenance Facility laboratory is certified and can provide the standards. Using the solvent specified by the user that will be used as the cleaning solvent, the preparation and analysis requirements for the standard are given in Table D-I. Large quantities of standard can be prepared,
provided that the proportion of oil to solvent is as specified. Transfer the standard to 20 mL vials suitable for shipping and long-term storage. Vials from Fisher Scientific catalog number 05-719-110 are acceptable. Attach a sticker and mark the solvent level on each vial with a pen. Each container of laboratory standard shall be marked or tagged with a batch number traceable to the laboratory results. Store in a cool, dry, dark place until shipped.
D.9.2 Use of standard. Multiple containers with the same batch number are considered the same standard for comparison purposes. Considering that each container holds around 20 mL, ensure that if multiple containers are used for comparison, they are requested at the same time and are of the same batch. Store containers in a cool, dry, dark place where they can not tip over and break, such as a designated storage locker or refrigerator.
TABLE D-I. Preparation and analysis of 5 ppm equivalent laboratory standards.
Solvent |
Soil and Loading |
Analysis to Verify Soil Level |
CFC-113 |
0.78±0.05 mg of MS2190TEP oil (D.6.1(b)) to 100±0.2 mL CFC-113 (D.6.1(a)) |
Measure the hydrocarbon oil and grease in CFC-113 solution by infrared spectrophotometry in accordance with ASTM D3921. The acceptance criteria is 5.0±0.5 ppm. |
HCFC-225G or HCFC- 225ca/cb |
0.78±0.05 mg of MS2190TEP oil (D.6.1(b)) to 100±0.2 mL HCFC-225 (D.6.1(a)) |
Measure the NVR in 500 mL minimum of HCFC- 225G or HCFC-225ca/cb solution by evaporative gravimetrics using a laboratory-approved procedure similar to ASTM D2109. The acceptance criteria is ±20%. |
HFE-7100 |
1.75±0.05 mg of Krytox grease (D.6.1(c)) to 1000±0.3 mL HFE-7100 (D.6.1(a)) |
Measure the NVR in 500 mL minimum of HFE-7100 solution by evaporative gravimetrics using a laboratory-approved procedure similar to ASTM D2109. The acceptance criteria is ±20%. |
D.10 Establishing dish acceptance criteria. Each dish has two acceptance criteria: clean dish and 5 ppm (with or without baseline). The applicable paragraphs and dosing requirements for establishing these acceptance criteria are summarized in Table D-II. The clean dish and 5 ppm acceptance criteria shall be established for a new dish, every six months after performing equipment maintenance specified in D.8, and whenever the need is identified during routine analysis (Section D.11). Normal aging of a dish and the sensor will require periodic determination of dish acceptance criteria. If baseline applies, the 5 ppm acceptance criteria is required for each batch or lot of
solvent.
TABLE D-II. Dish acceptance criteria applicability matrix.
Baseline Applies |
Clean Dish |
5 ppm |
|
Para |
Para |
Dosing |
|
No |
D.10.1 |
D.10.2 |
3 doses of 5 ppm standard |
Yes |
D.10.1 |
D.10.3 |
3 doses of unused solvent, followed by 3 doses of 5 ppm standard |
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