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ASTM D3792-99

(Test Method)

Standard Test Method for Water Content of Coatings by Direct Injection Into a Gas Chromatograph

Standard Test Method for Water Content of Coatings by Direct Injection Into a Gas Chromatograph

SCOPE
1.1 This test method is for the determination of the total water content of water-reducible paints. It has been evaluated for latex systems (styrene-butadiene, poly(vinylacetate)acrylic, acrylic). It has not yet been evaluated for other water-reducible paints but is believed to be applicable. The established working range of this method is from 40 to 55% water. There is no reason to believe that it will not work outside of this range.  
1.2 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
09-May-1999
ICS
87.040 - Paints and varnishes
Technical Committee
D01 - Paint and Related Coatings, Materials, and Applications
Drafting Committee
D01.21 - Chemical Analysis of Paints and Paint Materials
Current Stage
Ref Project

Relations

Replaced By
ASTM D3792-05 - Standard Test Method for Water Content of Coatings by Direct Injection Into a Gas Chromatograph
Effective Date
01-Jan-2005
Referred By
ASTM D6886-18 - Standard Test Method for Determination of the Weight Percent Individual Volatile Organic Compounds in Waterborne Air-Dry Coatings by Gas Chromatography
Effective Date
10-May-1999
Referred By
ASTM D5325-03(2021) - Standard Test Method for Determination of Weight Percent Volatile Content of Water-Borne Aerosol Paints
Effective Date
10-May-1999
Referred By
ASTM D7270-07(2021) - Standard Guide for Environmental and Performance Verification of Factory-Applied Liquid Coatings
Effective Date
10-May-1999
Referred By
ASTM D6577-15(2019) - Standard Guide for Testing Industrial Protective Coatings
Effective Date
10-May-1999
Referred By
ASTM D5146-10(2019) - Standard Guide to Testing Solvent-Borne Architectural Coatings
Effective Date
10-May-1999
Referred By
ASTM D5324-16(2022) - Standard Guide for Testing Water-Borne Architectural Coatings
Effective Date
10-May-1999
Referred By
ASTM D3960-05(2018) - Standard Practice for Determining Volatile Organic Compound (VOC) Content of Paints and Related Coatings
Effective Date
10-May-1999
Referred By
ASTM D7768-12(2018) - Standard Test Method for Speciated Organic Volatile Content of Waterborne Multi-Component Coatings by Gas Chromatography
Effective Date
10-May-1999
Referred By
ASTM D4143-16(2022) - Standard Guide for Testing Latex Vehicles
Effective Date
10-May-1999

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ASTM D3792-99 - Standard Test Method for Water Content of Coatings by Direct Injection Into a Gas ChromatographASTM D3792-99 - Standard Test Method for Water Content of Coatings by Direct Injection Into a Gas Chromatograph
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ASTM D3792-99 - Standard Test Method for Water Content of Coatings by Direct Injection Into a Gas Chromatograph
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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:D3792–99
Standard Test Method for
Water Content of Coatings by Direct Injection Into a Gas
1
Chromatograph
This standard is issued under the fixed designation D 3792; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 4. Significance and Use
1.1 This test method is for the determination of the total 4.1 In order to calculate volatile organic content (VOC) in
water content of waterborne paints. It has been evaluated for waterborne paints, it is necessary to know the water content.
latex systems (styrene-butadiene, poly(vinylacetate)-acrylic, This gas chromatographic test method provides a relatively
acrylic), epoxy acrylic resin systems and acrylic systems. The simple and direct way to determine water content.
established working range of this test method is from 15 to
5. Apparatus
90 %.Thereisnoreasontobelievethatitwillnotworkoutside
of this range. 5.1 Gas Chromatography—Any gas-liquid chromato-
graphic instrument equipped with a thermoconductivity detec-
1.2 The values given in inch/pound units are to be regarded
as the preferred unit of measurement. The values given in tor may be used. Temperature programming capability is
preferable, but isothermal operations may be adequate. See
parentheses are for information only.
1.3 This standard does not purport to address all of the Table 1.
5.2 Column—The column should be at least 4 ft (1.22 m) of
safety concerns, if any, associated with its use. It is the
1
responsibility of the user of this standard to establish appro- ⁄8-in. (3.2-mm) outside diameter tubing of stainless steel, or
other suitable material, lined with a TFE-fluorocarbon coating
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. packed with 60/80 mesh (180 to 250 µm) porous polymer
5
packing material. A longer 6-ft (1.83 m) column can be used
2. Referenced Documents
to improve resolution.
2.1 ASTM Standards: 5.3 Integrator—Any electronic integrator that can accu-
2
D 1193 Specification for Reagent Water rately quantify a gas chromatographic peak is acceptable.
D 1364 Test Method for Water in Volatile Solvents (Karl Alternatively, a recording potentiometer with a full-scale
3
Fischer Reagent Titration Method) deflectionof1-10mV,fullscaleresponsetimeof2sorlessand
E 180 Practice for Determining Precision Data of ASTM sufficient sensitivity and stability to meet the requirements of
4
Methods forAnalysis and Testing of Industrial Chemicals 5.1.
5.4 Liquid Charging Devices—Micro syringes of 5–10-µL
3. Summary of Test Method
capacity with a precision of 60.01 µL. Automatic injection of
3.1 A suitable aliquot of whole paint is internally standard-
samples improves the precision of this test method.
ized, diluted with dimethylformamide, and then injected into a
6. Column Conditioning
gas chromatographic column containing a porous polymer
packing that separates water from other volatile components. 6.1 Procedure—Install the packed column in the gas chro-
matographic unit leaving the exit end disconnected from the
detector. This will prevent any contamination of the detector
1
This test method is under the jurisdiction of ASTM Committee D-1 on Paint
with the column bleed.
and Related Coatings, Materials, andApplicationsand is the direct responsibility of
Subcommittee D01.21 on Chemical Analysis of Paints and Paint Materials.
Current edition approved May 10, 1999. Published July 1999. Originally
5
published as D 3792 – 79. Last previous edition D 3792 – 98. HayeSep R (silanized), was used in the round robin.Any other porous polymer
2
Annual Book of ASTM Standards, Vol 11.01. packing or other column giving equivalent or superior performance may be used.
3
Annual Book of ASTM Standards, Vol 06.04. These products are available from most gas chromatography suppliers and distribu-
4
Annual Book of ASTM Standards, Vol 15.05. tors.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
D3792
TABLE 1 Suggested Instrument Conditions purifier. Trace levels of water will accumulate on the column at low oven
temperatures and may affect the reproducibility as well as the accuracy of
Detector thermal conductivity
the determination.
Column 1.22 m 3 3.2 mm TFE-fluorocarbon coating
coated stainless steel
7.4 Dimethylformamide (DMF) (Anhydrous) gas chroma-
Packing 60/80 mesh porous polymer
Temperatures, °C tography, spectrophotometric quality (See Note 2).
Sample inlet 240
7.5 2-Propanol (Anhydrous) (Isopropanol)—See Note 2.
Dete
...

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