Method 1631, Revision E:
Mercury in Water by Oxidation, Purge and Trap, and Cold Vapor Atomic Fluorescence Spectrometry
August 2002冲刷的近义词
United States Office of Water
EPA-821-R-02-019 Environmental Protection 4303 August 2002 Agency
Method 1631, Revision E:
Mercury in Water by Oxidation, Purge and Trap, and Cold Vapor Atomic Fluorescence Spectrometry
Method 1631, Revision E
Acknowledgments
This Method was developed under the direction of William A. Telliard and Maria Gomez-Taylor of the Engineering and Analysis Division (EAD) within the U.S. Environmental Protection Agency's (EPA's) Office of Science and Technology (OST). EPA acknowledges contributions to this method by Frontier Geosciences, Inc., Albion Environmental, Battelle Marine Sciences Laboratory, STL-Canton, and Tekran Inc. Additional assistance in preparing the Method was provided by DynCorp Environmental and Interface, Inc.
Disclaimer
This Method has been reviewed and approved for publication by the Statistics and Analytical Support Branch within EPA’s Engineering and Analysis Division. Mention of trade names or commercial products does not constitute endorment or recommendation for u.
Questions concerning this Method or its application should be addresd to:
W.A. Telliard
Statistics and Analytical Support Branch (4303T)
U.S. Environmental Protection Agency酱肘花
Ariel Rios Building
1200 Pennsylvania Avenue, N.W.
Washington, DC 20460
Phone: 202/566–1061
Fax: 202/566–1053
i毛泽东七律长征
Method 1631, Revision E
Table of Contents
Introduction (iii)
1.0 Scope and Application (1)
2.0Summary of Method (2)
3.0 Definitions (3)
4.0 Contamination and Interferences (3)
5.0 Safety (6)
6.0 Apparatus and Materials (8)
7.0 Reagents and Standards (11)
我为你喝彩
8.0 Sample Collection, Prervation, and Storage (13)
9.0Quality Control (14)
10.0 Calibration and Standardization (22)
11.0 Procedure (25)
12.0 Data Analysis and Calculations (27)
13.0 Method Performance (29)
14.0Pollution Prevention (29)
15.0 Waste Management (30)
16.0 References (30)
17.0 Glossary (31)
18.0 Tables and Figures (34)
风清月朗
漂亮的拼音ii August 2002
最有价值球员Method 1631, Revision E鲟龙鱼的做法
Introduction
Method 1631 (the "Method") supports technology-bad and water quality-bad monitoring programs authorized under the Clean Water Act (CWA; the "Act").
CWA Sections 301 and 306 require EPA to publish effluent standards that restrict the direct discharge of pollutants to the nations waters, and CWA Sections 307(b) and (c) require EPA to promulgate nationally applicable pretreatement standards which restrict pollutant discharges into wers flowing to publicly owned treatment works (POTWs). The effluent limitations guidelines are published at CFR parts 401-503.
CWA Section 303 requires each State to t a water quality standard for each body of water within its boundaries. A State water quality standard consists of a designated u or us of a water body or a gment of a water body, the water quality criteria that are necessary to protect the designated u or us, and an antidegradation policy. CWA Section 304(a) requires EPA to publish water qualit
y criteria that reflect the latest scientific knowledge concerning the physical fate of pollutants, the effects of pollutants on ecological and human health, and the effect of pollutants on biological community diversity, productivity, and stability. The water quality standards rve two purpos: (1) they establish the water quality goals for a specific water body, and (2) they are the basis for establishing water quality-bad treatment controls and strategies beyond the technology-bad controls required by CWA Sections 301(b) and 306.
In 1987, amendments to the CWA required States to adopt numeric criteria for toxic pollutants (designated in Section 307(a) of the Act) bad on EPA Section 304(a) criteria or other scientific data, when the discharge or prence of tho toxic pollutants could reasonably be expected to interfere with designated us. Method 1631 was specifically developed to provide reliable measurements of mercury at EPA WQC levels.
In developing methods for determination of trace metals, EPA found that one of the greatest difficulties was precluding sample contamination during collection, transport, and analysis. The degree of difficulty, however, is highly dependent on the metal and site-specific conditions. Method 1631 is designed to preclude contamination in nearly all situations. It also contains procedures necessary to produce reliable results at the lowest WQC levels published by EPA. In recognition of t
he variety of situations to which this Method may be applied, and in recognition of continuing technological advances, Method 1631 is performance bad. Alternative procedures may be ud so long as tho procedures are demonstrated to yield reliable results.
Requests for additional copies of this draft Method should be directed to:
U.S. EPA Sample Control Center
6101 Stevenson Avenue
Alexandria, VA 22304-3540
703/461–2100
iii
