| Main Title |
Solvent minimization in the continuous liquid/liquid extraction of aqueous samples for semivolatile organics / |
| Author |
Slayton, J. ;
Warner, S. ;
Shreiner, P. ;
Tulip, C. ;
Messer, E.
|
| Other Authors |
|
| CORP Author |
Environmental Protection Agency, Annapolis, MD. Central Regional Lab. |
| Publisher |
U.S. Environmental Protection Agency, Central Regional Laboratory, |
| Year Published |
1993 |
| Report Number |
EPA/903/R-93/003 |
| Stock Number |
PB94-121555 |
| OCLC Number |
35112543 |
| Subjects |
Organic compounds ;
Sampling
|
| Additional Subjects |
Solvent extraction ;
Pollution abatement ;
Liquid wastes ;
Waste management ;
Extraction apparatuses ;
Continuous processing ;
Separation processes ;
Design criteria ;
Performance evaluation ;
Environmental tests ;
Hazardous materials ;
Chloromethanes ;
Cost analysis ;
Volatile organic compounds ;
Comparison ;
Laboratories ;
Waste minimization ;
Continuous extraction
|
| Internet Access |
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| EMBD |
EPA/903/R-93/003 |
|
NRMRL/GWERD Library/Ada,OK |
07/19/1996 |
| NTIS |
PB94-121555 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
43 p. : ill. ; 28 cm. |
| Abstract |
Continuous extraction (CE) of aqueous samples is quickly replacing separatory funnel extraction for semivolatile organics. The advantages of continuous liquid/liquid extraction over separatory funnel extractions include the following: improved extraction efficiencies and accuracy due to the increased number of theoretical plates associated with the re-distilled solvent being continuously exposed to the sample; savings in manpower due to the reduction of both time and physical labor; the effectiveness of the CE technique in highly contaminated matrices containing suspended solids (a problem with Solid Phase Extractions); the effective elimination of emulsions common with separatory funnel extractions of environmental samples; and the improved precision using CE. One disadvantage of the traditional CE procedure is the considerable volume of solvent. Given the overall expense of using methylene chloride, both the initial purchase cost and the extremely costly disposal fee, it would be desirable to miniaturize the procedure in order to minimize the volume of solvent. A design for a miniaturized continuous extractor was developed so as to maintain the sensitivity of the procedure, yet minimize the solvent necessary to perform the analysis. A series of extraction recovery experiments were performed using the prototype extractor design. |
| Place Published |
Annapolis, Md. |
| Corporate Au Added Ent |
United States. Environmental Protection Agency. |
| PUB Date Free Form |
{1993.} |
| BIB Level |
m |
| Medium |
microform |
| Cataloging Source |
OCLC/T |
| OCLC Time Stamp |
19960719140400 |
| Language |
eng |
| Origin |
OCLC |
| Type |
MERGE |
| OCLC Rec Leader |
00695nam 2200193Ka 45020 |
