Standard Test Method for Capacity of Mixed Bed Ion Exchange Cartridges

SIGNIFICANCE AND USE
This test method can be used to evaluate unused mixed bed ion exchange cartridges for conformance to specifications.
This test method provides for the calculation of capacity in terms of the volume of water treated to a conductivity end point.
The test method as written assumes that the ion exchange resins in the cartridge are either partially or fully converted to the H+ or OH- form. Regeneration of the resins is not part of this method.
This test method provides for the calculation of capacity on a cartridge basis.
This test method may be used to test different size mixed bed resin cartridges. The flow rate of test water and the frequency of sampling are varied to compensate for the approximate volume of resin in the test cartridge.
SCOPE
1.1 This test method covers the determination of the performance of mixed bed ion exchange resin cartridges in the active form when used for deionization. The test can be used to determine the initial capacity of unused cartridges or the remaining capacity of used cartridges. In this case performance is defined as ion exchange capacity (or throughput) to two defined endpoints. The method does not measure organics and does not attempt to determine the ultimate water quality attainable by the cartridge.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 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.

General Information

Status
Historical
Publication Date
14-Mar-2009
Technical Committee
Current Stage
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D7513 − 09
Standard Test Method for
Capacity of Mixed Bed Ion Exchange Cartridges
This standard is issued under the fixed designation D7513; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope 4. Summary of Test Method
1.1 This test method covers the determination of the perfor- 4.1 This test method consists of exhausting a cartridge of
mance of mixed bed ion exchange resin cartridges in the active mixedbedionexchangematerialtoaspecificendpointwithan
form when used for deionization. The test can be used to
influent solution of known composition and volume.
determine the initial capacity of unused cartridges or the
remainingcapacityofusedcartridges.Inthiscaseperformance
5. Significance and Use
is defined as ion exchange capacity (or throughput) to two
5.1 This test method can be used to evaluate unused mixed
defined endpoints. The method does not measure organics and
bed ion exchange cartridges for conformance to specifications.
does not attempt to determine the ultimate water quality
5.2 This test method provides for the calculation of capacity
attainable by the cartridge.
in terms of the volume of water treated to a conductivity end
1.2 The values stated in SI units are to be regarded as
point.
standard. No other units of measurement are included in this
5.3 The test method as written assumes that the ion ex-
standard.
change resins in the cartridge are either partially or fully
1.3 This standard does not purport to address all of the
+ -
converted to the H or OH form. Regeneration of the resins is
safety concerns, if any, associated with its use. It is the
not part of this method.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- 5.4 This test method provides for the calculation of capacity
bility of regulatory limitations prior to use on a cartridge basis.
5.5 Thistestmethodmaybeusedtotestdifferentsizemixed
2. Referenced Documents
bed resin cartridges. The flow rate of test water and the
2.1 ASTM Standards: frequency of sampling are varied to compensate for the
D1125 Test Methods for Electrical Conductivity and Resis- approximate volume of resin in the test cartridge.
tivity of Water
D1129 Terminology Relating to Water
6. Apparatus
D1193 Specification for Reagent Water
6.1 Test Assembly (Fig. 1), consisting of the following:
D2777 Practice for Determination of Precision and Bias of
6.1.1 Cartridge, and pressure vessel, if required. Connec-
Applicable Test Methods of Committee D19 on Water
tions shall be provided at the top and the bottom for the
D3375 Test Method for Column Capacity of Particulate
admission and removal of the ion exchange test water as
Mixed Bed IonExchange Materials
described in 7.3.
6.1.2 Test solution tank. Adequate means of regulating and
3. Terminology
measuring flow through the cartridge shall be provided. If the
3.1 Definitions—For definitions of terms related to water,
test flow rate (8.1) can not be obtained by gravity feed, then a
refer to Terminology D1129.
pump should be used.
6.1.3 Measuring circuit and in-line conductivity cells shall
be as described in Test Methods D1125.Acontinuous recorder
1 is recommended.
This test method is under the jurisdiction of ASTM Committee D19 on Water
and is the direct responsibility of Subcommittee D19.08 on Membranes and Ion
Exchange Materials.
7. Reagents and Materials
Current edition approved March 15, 2009. Published April 2009. DOI: 10.1520/
D7513-09.
7.1 Purity of Reagents—Reagent grade chemicals shall be
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
used in all tests. Unless otherwise indicated, it is intended that
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
all reagents shall conform to the specifications of the Commit-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. tee onAnalytical Reagents of theAmerican Chemical Society,
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D7513 − 09
FIG. 1 Typical Apparatus for Performance Testing of Mixed-Bed Ion Exchange Cartridges
where such specifications are available. Other grades may be where:
used, provided it is first ascertained that the reagent is of
D = the cartridge diameter, in cm
sufficiently high purity to permit its use without lessening the
L = the cartridge length, in cm
accuracy of the determination.
8.2 Using the cartridge volume calculated in 8.1, calculate
7.2 Purity of Water—All reference to water in this test
the test flow rate (in mL/min) as follows:
method shall be understood to mean Reagent Water Type I or
Q 5 300V
c
II conforming to Specification D1193.
where:
7.3 Ion Exchange Test Water (10 meq/L, or 500 ppm as
V = cartridge volume, in litres
c
CaCO )—Prepare a test water containing, in each litre:
NOTE1—Formultitubecartridgesthevolumeisthesumofthevolumes
7.3.1 0.294 g of calcium chloride dihydrate (CaCl -2H O),
2 2
of all the tubes.
7.3.2 0.336 g of oven-dried (105°C) sodium bicarbonate
8.3 Slowly introduce reagent water at the bottom of the
(NaHCO ), and
cartri
...

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