ASTM E2120-10 (2016) PDF

Full title and description

ASTM E2120-10 (2016) — Standard Practice for Performance Evaluation of the Portable X‑Ray Fluorescence Spectrometer for the Measurement of Lead in Paint Films. This practice provides laboratory procedures and manufacturer requirements for evaluating the performance of portable XRF instruments used to measure lead in paint films, including tests for bias, precision, limit of detection, linearity, interferences, substrate effects, stability and radiation safety.

Abstract

Provides a standardized laboratory practice for assessing portable XRF instrumentation intended to measure lead in paint films. Evaluation is based on replicate measurements of certified reference paint films on various substrates and produces values for instrument bias, precision, detection limits, linearity and other performance attributes. The practice also addresses construction and operational requirements (for example battery operation and electrical safety) and is intended for use by manufacturers, independent test laboratories and regulatory or field testing organizations. All performance data are reported in SI units.

General information

• Status: Withdrawn — withdrawn Jan 8, 2025 (no replacement listed).
• Publication date: Approved March 1, 2016; published 2016 (document historically shown as 01/03/2016 and updated in mid‑2016).
• Publisher: ASTM International.
• ICS / categories: 71.040.50 — Physicochemical methods of analysis (analytical instrumentation / XRF).
• Edition / version: E2120‑10 (2016) — often referenced as E2120‑10R16 in reaffirmation records; DOI 10.1520/E2120‑10.
• Number of pages: 9 pages.

Scope

This practice covers portable X‑ray fluorescence (XRF) instruments intended for measurement of lead in paint films. It is intended for use by manufacturers when introducing a model, by third‑party evaluators for independent instrument assessment, and by laboratories performing bias/precision/LOD/linearity/interference and substrate effect testing using certified reference paint films. The practice specifies that all performance evaluation data be reported in SI units and notes limitations regarding field accuracy versus laboratory estimates.

Key topics and requirements

• Laboratory procedures for determination of bias and precision (replicate measurements on certified reference paint films).
• Determination of limit of detection (LOD), linearity, interferences and substrate effects across a range of lead concentrations.
• Stability testing and calibration considerations, including battery condition effects and recommended indications for unreliable battery status.
• Construction and safety requirements (electrical safety, resistance to cleaning, drop resistance and radiation leakage limits).
• Use of certified reference materials (for example NIST SRM paint films or equivalent CRMs) as test materials and requirement to report results in SI units.
• Manufacturer reporting obligations: provide bias, precision and LOD values for the instrument model to potential users and interested agencies.

Typical use and users

Used by portable XRF manufacturers for initial model performance verification; independent testing laboratories and certification bodies performing instrument evaluations; environmental and public‑health agencies, building inspectors and contractors conducting instrument acceptance testing or quality control; and field testers performing periodic quality checks of XRF devices used for lead paint surveys and abatement decision support. The practice is commonly referenced by organizations assessing instrument suitability for regulatory or programmatic use.

Related standards

References and cross‑references within the practice include other ASTM terminologies and test practice documents (for example terminology standards and analytical method guidelines), applicable electrical safety standards (for example UL standards referenced for instrument electrical safety) and use of NIST SRM 2579 (or equivalent commercial CRMs) as test films. Earlier and related editions (E2120‑00 and E2120‑10) and various analytical guidance documents on limits of detection and sampling are also relevant.

Keywords

portable XRF, lead in paint, performance evaluation, limit of detection, bias, precision, linearity, substrate effects, radiation safety, NIST SRM 2579, X‑ray fluorescence

FAQ

Q: What is this standard?

A: ASTM E2120‑10 (2016) is a standard practice that defines laboratory methods and manufacturer requirements for evaluating the performance of portable X‑ray fluorescence spectrometers used to measure lead in paint films.

Q: What does it cover?

A: It covers laboratory test procedures (bias, precision, LOD, linearity, interferences, substrate effects, stability), construction and safety requirements for instruments, use of certified reference paint films for testing, and reporting of results in SI units.

Q: Who typically uses it?

A: Instrument manufacturers, independent test laboratories, regulatory agencies, field inspectors and contractors involved in lead paint surveys and abatement programs commonly use this practice for instrument evaluation or quality control.

Q: Is it current or superseded?

A: This edition (E2120‑10, 2016) has been withdrawn (withdrawal recorded Jan 8, 2025) and is listed as withdrawn with no replacement. Users should confirm current guidance or alternate standards for portable XRF performance evaluation when planning testing or compliance activities.

Q: Is it part of a series?

A: The document is part of ASTM’s E‑series practices and carries links to earlier E2120 editions and related ASTM terminology and analytical guidance standards; it was developed by ASTM committees concerned with analytical methods and instrument performance (subcommittees handling XRF and related methods).

Q: What are the key keywords?

A: Portable XRF, lead paint, performance evaluation, limit of detection, bias, precision, substrate effects, certified reference materials, radiation safety.