ASTM D8451-22 PDF
Name in English:
St ASTM D8451-22
Name in Russian:
Ст ASTM D8451-22
Original standard ASTM D8451-22 in PDF full version. Additional info + preview on request
Full title and description
Standard Test Method for Calculation of Unfixed Chrome Concentration in Wet Blue — ASTM D8451-22. This test method specifies procedures to analyze and calculate the concentration of unfixed (soluble) chromium in Wet Blue leather samples, including required reagents, calibration/standardization, and reporting in SI units.
Abstract
ASTM D8451-22 provides a short, four-page test method used by laboratories and tanneries to determine unfixed chromium (chromic oxide) remaining in Wet Blue leather after chrome tanning. The method describes sample handling, reagent preparation, instrument calibration (including flame/ICP considerations), calculation procedures, and notes on variability with Wet Blue age.
General information
- Status: Published / Active.
- Publication date: 31 March 2022 (designated D8451-22).
- Publisher: ASTM International.
- ICS / categories: 77.120.40 — Nickel, chromium and their alloys.
- Edition / version: D8451-22.
- Number of pages: 4.
Scope
This test method covers procedures to analyze and calculate unfixed chrome concentrations in Wet Blue leather. The standard requires use of SI units, describes essential reagents and calibration/standardization procedures for metal analysis, and notes that results may vary with the age and condition of the Wet Blue sample. It also reminds users to follow appropriate laboratory safety and environmental practices.
Key topics and requirements
- Definition and calculation of unfixed chromium (chromic oxide) concentration in Wet Blue.
- Sample preparation and handling to minimize variability related to Wet Blue age and storage.
- Reagent preparation and use of pre-standardized analytical reagents where appropriate.
- Calibration and standardization procedures for metal analysis instrumentation (e.g., flame or plasma methods) and recommended checks.
- Reporting in SI units and statement of limitations, safety, and environmental considerations.
Typical use and users
Used by leather manufacturers (tanneries), quality-control and analytical laboratories, raw material suppliers, and regulatory or compliance entities concerned with chromium content in leather products. Typical applications include in-process quality checks, acceptance testing of Wet Blue shipments, and laboratory method validation or proficiency testing.
Related standards
Other ASTM test methods and practices for metals analysis and laboratory procedure are complementary, for example standards addressing laboratory cleaning and preparation for metal analyses and related leather testing methods. Users commonly consult accompanying lab-practice standards when implementing D8451.
Keywords
Wet Blue, unfixed chrome, chromic oxide, chromium analysis, leather testing, ASTM D8451-22, metal calibration, SI units.
FAQ
Q: What is this standard?
A: ASTM D8451-22 is a Standard Test Method titled "Calculation of Unfixed Chrome Concentration in Wet Blue" that defines how to determine the amount of unfixed (soluble) chromium in Wet Blue leather samples.
Q: What does it cover?
A: It covers sample preparation, reagent and calibration requirements, calculation procedures, and reporting conventions (SI units) for measuring unfixed chromium in Wet Blue. The document is concise (four pages) and includes safety and method-limitation notes.
Q: Who typically uses it?
A: Tanneries, contract and in-house analytical laboratories, quality assurance personnel, suppliers of leather chemicals, and regulatory auditors use the method for acceptance testing and process control related to chromium tanning.
Q: Is it current or superseded?
A: The designation D8451-22 indicates the 2022 edition. As of the publication date shown in publisher records (March/April 2022) the standard is published and active; users should check with ASTM for any later revisions or reapprovals if required for regulatory or procurement purposes.
Q: Is it part of a series?
A: D8451 is a single-method designation within ASTM's leather and metals testing portfolio and was developed under committee D31 (leather) subcommittee processes; it is often used alongside other ASTM methods and laboratory practice standards for metals analysis.
Q: What are the key keywords?
A: Wet Blue, unfixed chrome, chromic oxide, chromium, leather testing, ASTM, D8451-22.