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ASTM D4642-04

(Test Method)

Standard Test Method for Platinum in Reforming Catalysts by Wet Chemistry

Standard Test Method for Platinum in Reforming Catalysts by Wet Chemistry

SIGNIFICANCE AND USE
This test method provides a means of determining the platinum content of fresh reforming catalysts where the platinum is supported on an all alumina substrate.4  
This test method is not intended to cover samples containing metals other than platinum. Palladium, rhenium, and rhodium in particular interfere with the spectrophotometric determination of platinum.
SCOPE
1.1 This test method covers the determination of platinum in nonzeolitic, fresh reforming catalysts containing platinum as the only precious metal, in the range of concentration of 0.200 to 0.700 weight %.
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
31-Mar-2004
Technical Committee
D32 - Catalysts
Drafting Committee
D32.03 - Chemical Composition
Current Stage
Ref Project

Relations

Replaces
ASTM D4642-92(1998) - Standard Test Method for Platinum in Reforming Catalysts by Wet Chemistry
Effective Date
01-Apr-2004
Replaced By
ASTM D4642-04(2010) - Standard Test Method for Platinum in Reforming Catalysts by Wet Chemistry
Effective Date
01-Sep-2010

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ASTM D4642-04 - Standard Test Method for Platinum in Reforming Catalysts by Wet ChemistryASTM D4642-04 - Standard Test Method for Platinum in Reforming Catalysts by Wet Chemistry
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ASTM D4642-04 - Standard Test Method for Platinum in Reforming Catalysts by Wet Chemistry
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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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D4642–04
Standard Test Method for
1
Platinum in Reforming Catalysts by Wet Chemistry
This standard is issued under the fixed designation D4642; 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. Significance and Use
1.1 Thistestmethodcoversthedeterminationofplatinumin 4.1 This test method provides a means of determining the
nonzeolitic, fresh reforming catalysts containing platinum as platinum content of fresh reforming catalysts where the plati-
4
the only precious metal, in the range of concentration of 0.200 num is supported on an all alumina substrate.
to 0.700 weight %. 4.2 This test method is not intended to cover samples
1.2 This standard does not purport to address all of the containing metals other than platinum. Palladium, rhenium,
safety concerns, if any, associated with its use. It is the andrhodiuminparticularinterferewiththespectrophotometric
responsibility of the user of this standard to establish appro- determination of platinum.
priate safety and health practices and determine the applica-
5. Apparatus
bility of regulatory limitations prior to use.
5.1 Balance, analytical, capable of weighing to the nearest
2. Referenced Documents
0.1 mg.
2
2.1 ASTM Standards: 5.2 Beakers, 250-mL, tall form and 600-mL.
D1193 Specification for Reagent Water 5.3 Cells, spectrophotometer, 1.0 cm, matched.
E177 Practice for Use of the Terms Precision and Bias in 5.4 Crucibles, platinum, or porcelain, 50-mL.
ASTM Test Methods 5.5 Desiccator, vacuum.
E288 Specification for Laboratory Glass Volumetric Flasks 5.6 Filter Paper, fine, ashless, slow filtering, 12.5 cm or
E456 Terminology Relating to Quality and Statistics equivalent.
E691 Practice for Conducting an Interlaboratory Study to 5.7 Flasks, volumetric, conforming to tolerances specified
Determine the Precision of a Test Method by Specification E288, 500-mL and 1000-mL.
2.2 U.S. Federal Specification: 5.8 Funnel, filtering, fluted bowl, 65 mm top diameter, 150
3
NNN-P-395C Tolerance for Class A Pipets mm stem.
5.9 Graduated Cylinders, 10-mL, 25-mL, 50-mL, 250-mL.
3. Summary of Test Method
5.10 Pipets, conforming to tolerances specified by Federal
3.1 The ground alumina based reforming catalyst is dis-
Specification NNN-P-395C, 5-mL, 10-mL, 15-mL.
solved using dilute hydrochloric acid. Stannous chloride is 5.11 Muffle Furnace, capable of 1000 6 25°C.
added to convert the platinum in solution to a yellowish-
5.12 Spectrophotometer, capable of measuring absorbance
orange-colored platinum stannous hydrochloride complex.The values between 200 to 800 nm with a photometric repeatability
absorbance of the resulting solution is measured comparatively
of 60.002 absolute at 1.0 absolute.
at 403 nm by spectrophotometry and the platinum content is 5.13 Watch Glass, flat, 100 mm.
calculated from a previously determined value for the absorp-
5.14 Watch Glass, ribbed, 65 mm.
tivity. 5.15 Wash Bottle, polyethylene, 500-mL.
5.16 Weighing Vial,25by40mm.
1
This test method is under the jurisdiction of ASTM Committee D32 on
6. Reagents
Catalysts and is the direct responsibility of Subcommittee D32.03 on Chemical
Composition. 6.1 Purity of Reagents—Reagent grade chemicals shall be
Current edition approved April 1, 2004. Published April 2004. Originally
used in all tests. Unless otherwise indicated, it is intended that
approved in 1986. Last previous edition approved in 1998 as D4642–92(1998).
all reagents shall conform to the specifications of the Commit-
DOI: 10.1520/D4642-04.
2
tee onAnalytical Reagents of theAmerican Chemical Society,
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
4
the ASTM website. This test method can be extended to spent reforming catalyst by isolating the
3
Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, platinum by the methods described in Analytical Chemistry, Vol 32, No. 6, May
Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098 1960, p. 646, “Assay Procedure for Platinum in Reforming Catalysts.”
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
D4642–04
where such specifications are available. Other grades may be permits mixing of all components. Prior to taking a portion for
used, provided it is first ascertained that the reagent is of a spectrophotometric reading, allow the solution to come to
sufficiently hi
...

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