ASTM E826-14 PDF
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St ASTM E826-14
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Ст ASTM E826-14
Original standard ASTM E826-14 in PDF full version. Additional info + preview on request
Full title and description
ASTM E826-14 — Standard Practice for Testing Homogeneity of a Metal Lot or Batch in Solid Form by Spark Atomic Emission Spectrometry. This practice defines procedures and statistical approaches for evaluating within‑unit and between‑unit elemental homogeneity of solid metal lots or batches (L/B) using spark atomic emission spectrometry (Spark‑AES), and may be adapted for other instrumental techniques where applicable.
Abstract
ASTM E826-14 presents a combined study methodology for assessing elemental homogeneity in metal lots or batches intended for reference material development or other quality control purposes. It covers sample selection, specimen preparation, measurement by Spark‑AES (with the option to adapt to XRF or AAS), statistical treatment of results (including outlier handling and drift correction), and criteria for acceptance based on intended use. The practice is aligned with ISO Guide 35 principles for certification of reference materials.
General information
- Status: Withdrawn (Withdrawn without replacement; last updated Jan 9, 2023).
- Publication date: 2014 (current edition approved Apr 1, 2014; published 2014).
- Publisher: ASTM International (Committee E01 — Analytical Chemistry for Metals, Ores, and Related Materials).
- ICS / categories: 77.040.99 (Other methods of testing of metals).
- Edition / version: E826-14 (2014 edition).
- Number of pages: 28 pages (typical published PDF length).
Scope
This practice is suitable for testing the homogeneity of a metal lot or batch in solid form by Spark‑AES and is primarily intended for development and evaluation of reference materials, but can be applied in any situation where a combined assessment of within‑unit and between‑unit elemental homogeneity is required. It includes recommended sampling strategies, measurement procedures, correction for instrument drift, statistical analysis, and guidance for reducing a non‑homogeneous set to a homogeneous subset.
Key topics and requirements
- Definition of sampling plans for lots/batches (unit selection and number of replicates).
- Specimen preparation and measurement procedures for Spark‑AES; notes on adapting procedures for XRF or AAS.
- Statistical analysis procedures for estimating within‑unit and between‑unit variance; guidance on outlier detection and treatment.
- Methods to detect and correct for instrument drift and to refine composition estimates using calibrants or type standards.
- Acceptance criteria must be predetermined based on the intended use of the lot/batch or reference material.
- Advice on reducing heterogeneous sets to homogeneous subsets where appropriate.
Typical use and users
Primary users include analytical chemistry laboratories, reference material producers and certifiers, metallurgical quality‑control teams, and researchers developing certified reference materials (CRMs). The practice is used when objective, statistically supported statements about elemental homogeneity of solid metal lots or batches are required prior to certification, release, or further processing.
Related standards
ASTM E826-14 references and aligns with ISO Guide 35 (Certification of Reference Materials: General and Statistical Principles) and cross‑relates to several ASTM practices for sampling, statistical evaluation, and spectrometric analysis (examples include ASTM practices on outlier handling and interlaboratory study design). It sits within the ASTM E01 committee portfolio for analytical chemistry of metals.
Keywords
homogeneity testing; metal lot; batch; spark atomic emission spectrometry; Spark‑AES; reference material; certified reference material; sampling; statistical analysis; ISO Guide 35.
FAQ
Q: What is this standard?
A: ASTM E826-14 is a practice that describes procedures and statistics for testing the elemental homogeneity of solid metal lots or batches using spark atomic emission spectrometry, primarily for reference material development.
Q: What does it cover?
A: It covers sampling plans, specimen preparation, Spark‑AES measurement considerations (and adaptation notes for other techniques), correction for instrument drift, statistical treatment of data (including outlier handling), and criteria for acceptance based on intended use.
Q: Who typically uses it?
A: Analytical labs, CRM producers, metallurgical QA/QC teams, and researchers performing homogeneity assessments for certification or quality control.
Q: Is it current or superseded?
A: It is withdrawn — ASTM lists E826-14 as withdrawn (withdrawn without replacement) with the document last updated on Jan 9, 2023. Users requiring homogeneity procedures should consult current ISO Guide 35 and other active ASTM practices or contact ASTM for guidance.
Q: Is it part of a series?
A: E826 is maintained under ASTM Committee E01 (Analytical Chemistry for Metals, Ores, and Related Materials) and is published within the ASTM annual volumes covering analytical chemistry for metals; it also cross‑references ISO Guide 35 and other related ASTM practices.
Q: What are the key keywords?
A: Homogeneity, Spark‑AES, reference material, metal lot, batch, elemental analysis, sampling, statistical evaluation, ISO Guide 35.