US Environmental Protection Agency Method 326.0, a new method for monitoring inorganic oxyhalides and optimization of the postcolumn derivatization for the selective determination of trace levels of bromate

2002 ◽  
Vol 956 (1-2) ◽  
pp. 93-101 ◽  
Author(s):  
Herbert P. Wagner ◽  
Barry V. Pepich ◽  
Daniel P. Hautman ◽  
David J. Munch
Keyword(s):  
Environmental Protection ◽  
Environmental Protection Agency ◽  
New Method ◽  
Protection Agency ◽  
Selective Determination ◽  
Environmental Protection Agency Method ◽  
Postcolumn Derivatization

Validation of Three New Methods for Determination of Metal Emissions Using a Modified Environmental Protection Agency Method 301

2006 ◽  
Vol 56 (12) ◽  
pp. 1733-1742 ◽  
Author(s):  
Catherine A. Yanca ◽  
Douglas C. Barth ◽  
Krag A. Petterson ◽  
Michael P. Nakanishi ◽  
John A. Cooper ◽  
...  
Keyword(s):  
Environmental Protection ◽  
Environmental Protection Agency ◽  
Protection Agency ◽  
New Methods ◽  
Environmental Protection Agency Method

The Use of Aniline Blue for the Determination of Dead Phytoplankton, Zooplankton and Meroplankton in LC50 Testings After 96 Hours… A Re-Evaluation of the US Environmental Protection Agency Methodology

2004 ◽  
Vol 126 (3) ◽  
pp. 215-218 ◽  
Author(s):  
Balram Seepersad ◽  
Kelvin Ramnath ◽  
Shyam Dyal ◽  
Reeza Mohammed
Keyword(s):  
Environmental Protection ◽  
Environmental Protection Agency ◽  
Staining Technique ◽  
Aniline Blue ◽  
Protection Agency ◽  
Lc50 Value ◽  
The Us ◽  
Visual Observations

There is a need for a reliable staining technique to distinguish between live and dead organisms following LC50 tests. This is especially so in cases where organisms can be stressed or even become unconscious and appear dead to the aided or naked eyes. Visual observations under such conditions can result in an LC50 value shifting to the lower concentration thereby imposing stiffer guidelines for compliance. Aniline blue can only stain individuals which are physiologically dead imposing an accurate live-dead evaluation and producing a true LC50 value. Guidelines imposed using such data will facilitate compliance and provide an accurate value for an LC50.

scholarly journals Identification of Particle Size Classes Inhibiting Protozoan Recovery from Surface Water Samples via U.S. Environmental Protection Agency Method 1623

2009 ◽  
Vol 75 (20) ◽  
pp. 6619-6621 ◽  
Author(s):  
Leigh-Anne H. Krometis ◽  
Gregory W. Characklis ◽  
Mark D. Sobsey
Keyword(s):  
Environmental Protection ◽  
Environmental Protection Agency ◽  
Protection Agency ◽  
Method Performance ◽  
Species Recovery ◽  
Inorganic Particles ◽  
Method 1623 ◽  
Particle Size Classes ◽  
Surface Water Samples ◽  
Environmental Protection Agency Method

ABSTRACT Giardia species recovery by U.S. Environmental Protection Agency method 1623 appears significantly impacted by a wide size range (2 to 30 μm) of particles in water and organic matter. Cryptospori dium species recovery seems negatively correlated only with smaller (2 to 10 μm), presumably inorganic particles. Results suggest constituents and mechanisms interfering with method performance may differ by protozoan type.

Skin Penetration Method Suggested for Environmental Protection Agency Requirements

1989 ◽  
Vol 8 (5) ◽  
pp. 829-835 ◽  
Author(s):  
Robert P. Zendzian
Keyword(s):  
Environmental Protection ◽  
Environmental Protection Agency ◽  
Skin Penetration ◽  
Dermal Absorption ◽  
Male Rats ◽  
Application Site ◽  
Protection Agency ◽  
Blood Concentrations ◽  
Total Urine

The Environmental Protection Agency has circulated a protocol for examining the dermal absorption of pesticides in rats. This protocol will be considered as a guideline for determining the dermal absorption of pesticides. Approximately 40 pesticides have been evaluated with this protocol. Male rats are dosed dermally with labeled pesticide. Doses, in mg/cm2, are applied to the shaven skin of the back as the use product, diluted with water if necessary. The application site is protected with a nonocclusive device. Four rats per dose are exposed for 0.5, 1, 2, 4, 10, or 24 hrs. Samples collected are soap and water wash, skin at the application site, blood, total urine and feces, carcass, and selected tissues. Mass balance calculations include determination of pesticide that can be removed with soap and water, pesticide bound on or in the skin, total pesticide absorbed with time, blood concentrations with time, pesticide accumulation in target tissues, and pesticide excreted.

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