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Standard Test Method for Total Carbon and Organic Carbon in Water by High Temperature Catalytic Combustion and Infrared Detection
Name übersetzen
NORM herausgegeben am 1.2.2017
Bezeichnung normen: ASTM D7573-09(2017)
Anmerkung: UNGÜLTIG
Ausgabedatum normen: 1.2.2017
SKU: NS-676493
Zahl der Seiten: 8
Gewicht ca.: 24 g (0.05 Pfund)
Land: Amerikanische technische Norm
Kategorie: Technische Normen ASTM
Keywords:
carbon, carbon dioxide, high temperature catalytic oxidation, organic carbon, total carbon,, ICS Number Code 13.060.50 (Examination of water for chemical substances)
Significance and Use | ||||||||||||||
5.1 This test method is used for determination of the carbon content of water from a variety of natural, domestic, and industrial sources. In its most common form, this test method is used to measure organic carbon as a means of monitoring organic pollutants in industrial wastewater. These measurements are also used in monitoring waste treatment processes. 5.2 The relationship of TOC to other
water quality parameters such as chemical oxygen demand (COD) and
total oxygen demand (TOD) is described in the
literature.1.1 This test method covers the
determination of total carbon (TC), inorganic carbon (IC), total
organic carbon (TOC), dissolved organic carbon (DOC), and
non-purgable organic carbon (NPOC) in water, wastewater, and
seawater in the range from 0.5 mg/L to 4000 mg/L of carbon. Higher
levels may be determined by sample dilution. The sample is injected
onto a quartz bed heated at 680ºC. The sample converts into a
gaseous phase and forced through a layer of catalyst ensuring
conversion of all carbon containing compounds to
CO1.2 For TOC and DOC analysis a portion of
the sample is injected to determine TC or dissolved carbon (DC). A
portion of the sample is then acidified and purged to remove the
IC. The purged inorganic carbon is measured as TIC, or DIC. TOC or
DOC is calculated by subtracting the inorganic fraction from the
total carbon: 1.3 For NPOC analysis a portion of sample is acidified and purged to remove IC. The purged sample is then injected to determine NPOC. 1.4 This test method was used successfully with reagent water spiked with potassium hydrogen phthalate, sucrose, nicotinic acid, benzoquinone, sodium dodecyl benzene sulfonate, urea, acetic acid, and humic acid. It is the user's responsibility to ensure the validity of this test method for waters of untested matrices. 1.5 This test method is applicable only to carbonaceous matter in the sample that can be introduced into the reaction zone. The syringe needle or injector opening size generally limits the maximum size of particles that can be so introduced. 1.6 In addition to laboratory analyses, this test method may be applied to stream monitoring. 1.7 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.8 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. |
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2. Referenced Documents | ||||||||||||||
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