ASTM D5386 Test Method for Color of Liquids Using Tristimulus Colorimetry
8. Hazards
8.1 Consult current OSHA regulations, suppliers' Material Safety Data Sheets, and local regulations for all materials used in this test method.
9. Sampling and Handling
9.1 Refer to Practice D3437 for proper sampling and handling of liquid hydrocarbons analyzed by this test method.
10. Calibration
10.1 Prepare instrument for operation by following the instrument manufacturer's instructions.
10.2 Use instrument standardizing adjustments or program to obtain a Pt-Co value of 0 for a sample of distilled water.
10.3 Measured on a regular basis an intermediate Pt-Co standard solution in the Pt-Co range of the samples being analyzed, would verify instrumental performance. It is desirable for the user to be able to adjust the instrument to match the Pt-Co standard solutions as defined in 7.1.
11. Procedure
11.1 Check to be sure that the instrument is operating in accordance with the manufacturer's operations manual.
11.2 Take three (3) instrumental readings without sample replacement, with the average taken as being a representative Pt-Co measurement of the sample. Exercise care to avoid sample contamination.
