Oil on Metal Analysis | UVF-TRILOGY Analyzer

Got oil on metal, small parts or other surfaces? Need laboratory analysis? Sitelab's UVF analyzers can be used to quickly measure concentrations of oil coated on steel, aluminum and other metals across a broad range of manufacturing industries. This includes parts and components used in automotive, HVAC, food, medical, pharmaceuticals or to monitor environmental remediation efforts from spills or accidents.

Lubricating oils are often used to prevent corrosion or assist with the production process. Residual oils remaining after the cleaning process can cause problems. Testing parts or surfaces to ensure they are clean and oil free is important for quality control.

Small parts or surface wipes using gauze pads are extracted in hexane solvent and tested for hydrocarbon content. The equipment is easy to use and results only take about 5 minutes. For best performance, use the oil from your site to calibrate the UVF analyzer. If the oil is not available, test samples for EDRO or other calibrations suitable for analysis. You can also ship your oil to Sitelab and we'll factory calibrate the analyzer for you.

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Sitelab's UVF-Trilogy analyzer with EDRO UV Module (below) detects hydrocarbons in the diesel and oil range and is most often used for oil on metal applications.

UV fluorescence methods detect aromatic hydrocarbons only and are not sensitive to aliphatic hydrorcarbons.

Most oils used in manufacturing are mineral oil-based, which exract well in hexane but contain a low aromatic content. As a result, when using the oil to calibrate, detection limits are higher compared to using Sitelab's EDRO standard. The minimum detection limit in most oils is less than 1 ppm.

Water soluable oils perform better using methanol for analysis compared to hexane. The same procedures and materials can be used for analysis.

WIPE SAMPLE TEST KIT:
Sitelab Part No. EXTR14-WIPE

Use to prepare and analyze wipe samples for oil content. Includes sample extraction vials, gauze pads and other supplies for 14 samples. Use for oil on metal, concrete or other surfaces. Use with HPLC grade solvent.

SEE OIL ON METAL TEST PROCEDURE

Click images below to enlarge:

OIL ON STEEL PRESSURE VALVES

Worthington Cylinders (Columbus, Ohio) manufacturers steel pressure valves, which are coated with a special oil to lubricate the threads after they’re made. Too much or too little oil can make them hard to turn. Quality control engineers submitted samples to Sitelab for hydrocarbon analysis to determine how much oil to use to improve the performance of their product.

Customer uses KeyKote oil, made by MacDermid, Inc., which contains a mixture of petroleum distillates, glycol ether and other ingredients. The aromatic hydrocarbons in the oil fluoresces strongly using Sitelab’s UVF-Trilogy instrument allowing it to detect very low concentrations.

CASE STUDY WITH PERFORMANCE DATA

Samples were extracted in 20 mL hexane using 8 oz. glass jars and measured on the UVF-Trilogy EDRO analyzer calibrated to the oil. Data was used to determine the optimum content of oil to meet their specifications.

APPLICATIONS TESTING MEDICAL PARTS & HVAC COMPONENTS

Metal samples are extracted in solvent and measured on Sitelab's UVF analyzers. Concentrations of oil are in ppm units. Test results can be converted to mg/sq-meter if the surface area is known, which is often required for certain applications.

Examples shown here include testing oxygen pump components, parts used to make heart valves and surface wipes testing hospital ventilation air ducts.

Sitelab's UVF-Trilogy and UVF-500D models replaced the older UVF-3100 and TD-500D used in this study.

SEE EXAMPLES TESTING OIL ON METAL

FLUORESCENT PENETRANT OILS

A medical implant manufacturer uses fluorescent penetrant oils to coat their parts during the manufacturing process. The parts must be oil-free when the parts are cleaned for resale. Photos below are from pilot study performed.

This type of oil flouresces very strongly and can be detected using Sitelab's portable UVF-500D analyzer with detection limits as low as 10 ppb. Residual oil on the screws and solvent extracts are easily visible under a UV black light.

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