Work Item
ASTM WK80437
New Test Method for Standard Test Method for N-Hexane Recoverable Total Oil and Grease and Total Petroleum Hydrocarbons in Water by ATR-Infrared
1. Scope
1.1 This test method covers the determination of total oil and grease and total petroleum hydrocarbons in produced water and wastewater by an infrared (IR) determination of n-hexane extractable substances from the sample. Included in this estimation of total oil and grease are any other compounds soluble in the solvent.
1.2 This method defines total oil and grease in produced water and wastewater as that which is extractable in the test method and measured by IR absorption from 3.34 µm to 3.54 µm (2825 cm-1 to 2994 cm-1). Similarly, this test method defines total petroleum hydrocarbons in produced water and wastewater as that oil and grease which is not adsorbed by silica gel in the test method and measured by IR absorption from 3.34 µm to 3.54 µm (2825 cm-1 to 2994 cm-1). Alternative methods for total oil and grease and/or total petroleum hydrocarbons may not produce similar results.
1.3 This 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 This test method is intended as a field test only and should be treated as such. This method is not intended to replace laboratory-based regulatory methods currently in use.
1.6 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.7 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; water; IR spectroscopy; TOG; TPH
Rationale
The test method proposed in this standard provides a method for oil in grease analysis that is ideal for use in the field . Because of this, the method is already one of the primary methods being used for daily checks and pre-compliance checks of oil and grease measurements. Since there are already a significant number of instruments in the field using this method, it is best to develop an official ASTM method so that the 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: 01-06-2022
Technical Contact: Mitchell Myers
Item: 002
Ballot: D19.06 (22-01)
Status: Will Reballot Item
Item: 010
Ballot: D19 (22-03)
Status: Will Reballot Item
Item: 006
Ballot: D19 (22-05)
Status: In Balloting