EPA Method C in the EPA methods list database. View all EPA methods. US Environmental Protection Agency () Method C. Separatory Funnel Liquid-Liquid Extraction, Revision 3. Methods C and C state to spike surrogates into the graduated cylinder or sample bottle and mix well. Multiple transfers introduces potential for losses.

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Subscribe to our eNewsletter with daily, weekly or ela updates: Follow us on Twitter: Home Chromatography Sample Prep. Discussions about sample preparation: Sun Jul 03, I’ve tried researching for alternatives, but found none.

Is there some sort of method I’m missing?

Alternatively, is there any reliable and simple automatisation available? I doubt that our lab will invest a lot of money into costly automation, but knowing the options is better than not.

Thu Apr 18, 2: My experience – albeit limited – with these standard methods is that the developers are usually a committee. They generally have thought of and tried during the interlaboratory collaboratives everything that might work for the analysis. They probably found that the solvent-solvent extraction is the best way to go. However, if they didn’t. Have you given solid-phase extraction a shot?

If your waste water is really high in 350c, it probably won’t work very well. I understand your frustration. Solvent extraction of beer doesn’t work very well either.

Fri Jul 20, 9: We don’t do liq-liq on waste water, but some of our surface waters aren’t much better 351c0 think.

In our experience we recover ml of the initial 6ml of solvent. It still is liq-liq, but it is a lot easier than working with seperation funnels etc.


We do approx samples incl extracted calibration curve and QC on a single day by 1 analist. Sounds quite a bit simpler, but is it a in-house method, or is there some kind of known method associated with it?

Yes it is an in-house method, but I don’t really see a difference in shaking a sample in a separation funnel or in a centrifuge epq Do you extract just once or epaa times? We compare our surrogate recoveries to the mean of the recovery found in our calibration which is made in drinking water. Mon Jan 07, 8: The past is there to guide us into the future, not to dwell in. Has anyone looked into validating EPA to use instead of ?

I know that many EPA methods take the “prove it and use it” approach, just wanted to know if anyone succeeded in adapting it for wide usage. The in house method mentioned above is close enough, but we’re an ISO accredited laboratory and I was wondering how feasible it is.

For me here in Belgium the EPA numbers don’t say a lot since we don’t use them. But we are a drinking water lab and this method is under accreditation. As you say we had to prove it works by proficiency tests and by validation results.

Mon Mar 28, 5: Method is a nice alternative if you can achieve adequate sensitivity. Extraction pH is dependent on the target analytes, e.

EPA Method 3510C

Thu Mar 03, 8: You should be able to find their how to video on YouTube. I’ve just recieved the large VOA vials needed forwish me luck. I have run a Demonstration of Capability study using ml boston round bottles as the separatory funnel and shaking on a horizontal shaker table. Using the solvents listed in the Bottle Liquid Liquid Extraction procedure http: The shaker table is a modification 5310c I did to speed up the process.


Shaking for 10 minutes each time then 10 minutes in a centrafuge definitely helps separate the layers and for actual samples ela necessary for emulsion breaking I use a pipette to remove the organic layer.

SW-846 Test Method 3510C: Separatory Funnel Liquid-Liquid Extraction

Three extractions in the acid, then add salt and three extractions in the base, just as the blle procedure. It is actually better recoveries than we were getting on continuous liquid liquid extraction. I then use ul injections to improve sensitivity. I have sent an email to the MICE site to ask if e;a sample bottle can be considered equivalent to a separatory funnel so we can claim EPA Method C as the extraction method, or if we have to claim EPA Method microscale extraction method with modification to larger vial size.

Liquid/Liquid extractionis there another verisatile way? – Chromatography Forum

If a separatory funnel can be defined as not having to include a stopcock at the bottom then either method should be applicable. Those I think would be even better than doing the extraction in the bottle, just for purposes of centrifuging since you have to limit the centrifuge speed on the bottles to prevent breaking them.

Hey James, May I contact you personally? The only option on your profile is Yahoo messenger and that does not seem to work. In total there is 1 user online:: No registered users and 1 guest.

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