Work Item
ASTM WK63944
New Test Method for N-Hexane Recoverable Oil and Grease and Nonpolar Material in Water by ATR-Infrared Determination
1. Scope
1.1 This test method covers the determination of oil and grease and nonpolar material in produced water and wastewater by an infrared (IR) determination of n-hexane extractable substances from the sample. Included in this estimation of oil and grease are any other compounds soluble in the solvent. 1.2 This test method defines oil and grease in water and wastewater as that which is extractable in the test method and measured by IR absorption at 2930 cm-1 or 3.4 um. Similarly, this test method defines nonpolar material in produced water and wastewater as that oil and grease that is not adsorbed by silica gel in the test method and measured by IR absorption at 2930 cm-1. 1.3 This test method covers the range of 5 to 200 mg/L and may be extended to a lower or higher level by extraction of a larger or smaller sample volume collected separately. 1.4 This test method uses a horizontal attenuated total reflectance (HATR) crystal and a cubic zirconia crystal. 1.5 Units--The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard. 1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Keywords
dispersive infrared; filtometric infrared; FTIR; grease; HATR; oil; hexane extraction; spectroscopy; water
Rationale
The test method proposed provides a cheap and easy method for oil in grease analysis that is ideal for use in the field (requires small amount of room and time). Because of this, this test method is already one of the primary methods being used for daily checks and precompliance checks of oil in grease measurements. Since there are already thousands of instruments in the field using this test method, it is best to develop an official ASTM test method so that the test method is standardized from user to user providing more consistent results across the industry.
The title and scope are in draft form and are under development within this ASTM Committee.
Work Item Status
Date Initiated: 06-15-2018
Technical Contact: Mitchell Myers
Item: 001
Ballot: D19.06 (18-02)
Status: Will Reballot Item
Item: 002
Ballot: D19.06 (21-01)
Status: Will Reballot Item