From: Frankie Wood-Black <fwoodblack90**At_Symbol_Here**GMAIL.COM>
Subject: Re: [DCHAS-L] The different between oil in water and oil and grease
Date: Tue, 10 May 2016 14:26:49 -0500
Reply-To: DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
Message-ID: CAEPFAxWY4_YiTUrKGNNLxXztQw3+vNQeGrYk_CjA2X1K0O_=1A**At_Symbol_Here**

EPA Method 1664A N-Hexane Extractable Material (HEM; Oil and Grease) and Silica Gel Treated N-Hexane Extractable Material (SGT-HEM; Non-polar Material) by Extraction and Gravimetry (Method 1664A; the Method)

Will measure the extractable material, i.e. oils, greases, etc. It is used specifically for wastewater analyses and was developed as a replacement method when CFCs were banned.

Thus, depending upon your application, i.e. if you are just looking for the amount of a particular "oil" in the water - the answer is that this method is going to measure what is extracted by the n-hexane.

If you are trying to look at "intrained water" such as oil in produced waters, desalter water, or other process type water - then you really need to be looking at other methods. There is a chapter by M. Yang - M. Yang (B) TUV NEL Ltd, Scottish Enterprise Technology Park, East Kilbride, Glasgow G75 0QF, UK K. Lee, J. Neff (eds.), Produced Water, DOI 10.1007/978-1-4614-0046-2_2, 57 C Springer Science+Business Media, LLC 2011 That looks at methods for oil in produced waters. There are also a number of vendors that produce analyzers that can do this "online"

Frankie Wood-Black, Ph.D., REM, MBA
Principal - Sophic Pursuits
NOTE - ADDRESS CHANGE - Mailing Address - PO Box 433, Tonkawa, OK 74653
Note - new email address effective March 15 fwoodblack90**At_Symbol_Here**


On Tue, May 10, 2016 at 1:22 PM, AbdulAziz AlRueshed <abdulaziz208**At_Symbol_Here**> wrote:
Can we used EPA 1664A method to measure oil in water??

Sent from my iPhone

> On May 10, 2016, at 8:50 PM, Dave Einolf <dave**At_Symbol_Here**ENDEAVOUREHS.COM> wrote:
> Oil and grease (more specifically, fats, oils, and greases (FOG) is
> generally a parameter applied to municipal wastewater which includes food
> grade materials. There is no distinction as applied in wastewater standards
> (my area) - am not sure if there are differential test methods - so not
> entirely sure what you are asking.
> Dave Einolf
> -----Original Message-----
> From: DCHAS-L Discussion List [mailto:dchas-l**At_Symbol_Here**] On Behalf Of
> AbdulAziz AlRueshed
> Sent: Tuesday, May 10, 2016 10:34 AM
> To: DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU
> Subject: [DCHAS-L] The different between oil in water and oil and grease
> Good night Gentlemen,
> I tried my best to look for a clear definition to differentiate between oil
> in water in oil industry and oil and grease as environmental parameter..
> Can you please clear up this definition for me?
> Best regards,
> AbdulAziz AlRueshed
> Saudi Aramco
> Sent from my iPhone

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