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ASTM-D1252:2006 Edition

ASTM-D1252:2006 Edition

$44.96

D1252-06 Standard Test Methods for Chemical Oxygen Demand (Dichromate Oxygen Demand) of Water

Published By Publication Date Number of Pages
ASTM 2006 12
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1.1 These test methods cover the determination of the quantity of oxygen that certain impurities in water will consume, based on the reduction of a dichromate solution under specified conditions. The following test methods are included: Equation 1 – Test Method A-Macro COD by Reflux Digestion and Titration Equation 2 – Test Method B-Micro COD by Sealed Digestion and Spectrometry

1.2 These test methods are limited by the reagents employed to a maximum chemical oxygen demand (COD) of 800 mg/L. Samples with higher COD concentrations may be processed by appropriate dilution of the sample. Modified procedures in each test method (Section 15 for Test Method A and Section 24 for Test Method B) may be used for waters of low COD content ( 50 mg/L).

1.3 As a general rule, COD results are not accurate if the sample contains more than 1000 mg/L Cl . Consequently, these test methods should not be applied to samples such as seawaters and brines unless the samples are pretreated as described in Appendix X1.

1.4 This test method was used successfully on a standard made up in reagent water. It is the user’s responsibility to ensure the validity of these test methods for waters of untested matrices.

1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements, see Sections 8, 15.6, and 24.5.

PDF Catalog

PDF Pages PDF Title
1 Scope
Referenced Documents
Terminology
Summary of Test Methods
2 Significance and Use
Interference and Reactivity
Reagents
Hazards
TABLE 1
3 Sampling
Scope
Summary of Test Method
Interferences
Apparatus
Reagents
4 Procedure
Calculation
Precision and Bias
FIG. 1
5 Scope
Summary of Test Method
Interferences
FIG. 2
TABLE 2
6 Apparatus
Reagents
Calibration
FIG. 3
7 Procedure
Calculation
Precision and Bias
TABLE 3
8 Quality Control (QC)
FIG. 4
TABLE 4
FIG. 5
TABLE 5
9 FIG. 6
TABLE 6
10 FIG. 7
11 Keywords
X1. PRETREATMENT OF WASTEWATER SAMPLES
X1.1
X1.2 Procedure
X1.3 Discussion
TABLE X1.1
12 TABLE X1.2
FIG. X1.1

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