ASTM D4779-93

Standard Test Method for Total, Organic, and Inorganic Carbon in High Purity Water by Ultraviolet (UV) or Persulfate Oxidation, or Both, and Infrared Detection (Withdrawn 2002)

SCOPE
1.1 This test method covers the determination of total carbon (TC), organic carbon (OC), and inorganic carbon (IC), in makeup water and high purity process water such as demineralizer effluent, condensate, and electronic grade rinse water. The tested concentration range is from 50 to 1000 [mu]g of carbon per litre.
1.2 It is the user's responsibility to ensure the validity of this test method for waters of untested matrices.
1.3 This standard does not purport to address all of the safety problems, 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.

General Information

• Status: Withdrawn
• Publication Date: 31-Dec-1992
• Withdrawal Date: 09-Oct-2002
• ICS: 71.060.10 - Chemical elements
• Technical Committee: D19 - Water
• Drafting Committee: D19.03 - Sampling Water and Water-Formed Deposits, Analysis of Water for Power Generation and Process Use, On-Line Water Analysis, and Surveillance of Water

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D 4779–93
Standard Test Method for
Total, Organic, and Inorganic Carbon in High Purity Water
by Ultraviolet (UV) or Persulfate Oxidation, or Both, and
1
Infrared Detection
This standard is issued under the fixed designation D 4779; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (ε) indicates an editorial change since the last revision or reapproval.
1. Scope 3.2.3 total carbon (TC)—the sum of inorganic and organic
carbon.
1.1 This test method covers the determination of total
carbon (TC), organic carbon (OC), and inorganic carbon (IC),
4. Summary of Test Method
in makeup water and high purity process water such as
4.1 For total carbon measurement, sample is injected into a
demineralizer effluent, condensate, and electronic grade rinse
gas-sparged reactor containing acidified potassium persulfate
water. The tested concentration range is from 50 to 1000 µg of
(K S O ) or sodium persulfate (Na S O ) solution; either
2 2 8 2 2 8
carbon per litre.
elevated temperature or ultraviolet (UV) radiation is used to
1.2 Itistheuser’sresponsibilitytoensurethevalidityofthis
enhance the oxidation. Both inorganic and organic carbon
test method for waters of untested matrices.
compounds are converted into CO , which is swept, either
2
1.3 This standard does not purport to address all of the
directly or by trapping and thermal desorption, to a CO -
2
safety problems, if any, associated with its use. It is the
specific linearized infrared detector. Output signal is measured
responsibility of the user of this standard to establish appro-
as peak height or integrated area and results displayed as
priate safety and health practices and determine the applica-
fractional milligrams of carbon per litre or equivalent. For
bility of regulatory limitations prior to use.
directorganiccarbondetermination,thesampleisacidifiedand
2. Referenced Documents sparged to remove inorganic carbon, prior to oxidation (purge-
able organic compounds may be lost in this procedure). For
2.1 ASTM Standards:
2
inorganic carbon measurement, the CO sparged off in the
2
D 1129 Terminology Relating to Water
organic carbon step may be quantified, or the sample may be
D 1192 Specification for Equipment for Sampling Water
2 injectedintothereactorwiththeUVsourceoffsothatorganics
and Steam in Closed Conduits
2
are not oxidized.
D 1193 Specification for Reagent Water
4.2 Organic carbon may also be measured as the difference
D 2777 Practice for Determination of Precision and Bias of
2
between“ total carbon’’ and “inorganic carbon’’ results.
Applicable Methods of Committee D-19 on Water
D 3370 Practices for Sampling Water from Closed Con-
5. Significance and Use
2
duits
5.1 Accuratemeasurementoforganiccarboninwateratlow
3. Terminology and very low levels is of particular interest to the electronic,
pharmaceutical, and steam power generation industries.
3.1 Definitions—For definitions of terms used in this test
5.2 Elevated levels of organics in raw water tend to degrade
method, refer to Terminology D 1129.
ion exchange capacity. Elevated levels of organics in high
3.2 Definitions of Terms Specific to This Standard:
purity water tend to encourage biological growth and, in some
3.2.1 inorganic carbon (IC)—carbon in the form of carbon
cases,aredirectlydetrimentaltotheprocessesthatrequirehigh
dioxide, carbonate ion, or bicarbonate ion.
purity water.
3.2.2 organic carbon (OC; frequently also TOC)—carbonin
5.3 In the case of steam power generation, naturally occur-
the form of organic compounds.
ring organics can degrade to CO and low molecular weight
2
organic acids which, in turn, are corrosive to the process
1
equipment.
This test method is under the jurisdiction ofASTM Committee D-19 on Water
and is the direct responsibility of Subcommittee D19.11 on Standards for Water for
5.4 Inorganic carbon can also cause problems in a steam
Power Generation and Processes.
power system. CO entering steam condensate that contains
2
Current edition approved Sept. 15, 1993. Published November 1993. Originally
ammonia, reacts to form ammonium carbonate, which is not
published as D 4779 – 88. Last previous edition D 4779 – 88.
2
Annual Book of ASTM Standards, Vol 11.01. removed by the condenser air ejection system. If condensate
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D 4779–93
polishers are operated beyond the ammonia break, continued 6.4.3 As an expedient for most applications, method vali-
operation on an ammonium cycle can result in selective dation can be checked using KHP, acetic acid, and acetonitrile
exha
...