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| • New Update News for CPSIA |
UNITED STATES
CONSUMER PRODUCT SAFETY COMMISSION
DIRECTORATE FOR LABORATORY SCIENCES
DIVISION OF CHEMISTRY
10901 DARNESTOWN RD
GAITHERSBURG,MD 20878
Test Method: CPSC-CH-E1003-09
Standard Operating Procedure for Determining Lead (Pb) in Paint and Other
Similar Surface Coatings*
April 26, 2009
This document provides information on the test method that is used by the U.S. Consumer
Product Safety Commission’s (CPSC) testing laboratory (LSC) in the analysis of paint and
certain painted products. The method is used to determine the total lead content of paint, or a
painted surface, on a dry paint basis. This method supersedes all previously published standard
operating procedures for lead in paint testing. Existing accreditations remain valid. The rules
for accreditation for lead in paint testing for compliance to the Ban of Lead-Containing Paint and
Certain Consumer Products Bearing Lead Containing Paint, Code of Federal Regulations, Title
16, Part 1303 (16 C.F.R §1303) remain unchanged, and do not explicitly require the use of this
or any earlier standard operating procedure
(http://www.access.gpo.gov/nara/cfr/waisidx_08/16cfr1303_08.html).
This method is provided to inform interested parties of the method used by LSC for assessing the
total lead in paint and other surface coatings. Other laboratories making such assessments are
not required to follow this method; however, other laboratories should consider using these
procedures to ensure they obtain results that are consistent with CPSC staff’s for purposes of
compliance to 16 C.F.R. §1303.
CPSC staff has concluded that this test method is sufficient to make appropriate determinations
concerning lead in paint, as defined in 16 C.F.R §13031. Screening tests by x-ray fluorescence
may sometimes be employed by CPSC staff to determine samples in need of such testing.
Definitions:
1. Sample – an individual consumer product or a group of identical consumer products from
a batch to be tested.
* This document was prepared by CPSC staff, has not been reviewed or approved by, and may not necessarily
reflect the views of, the Commis sion.
1 The Consumer Product Safety Improvement Act of 2008 (CPSIA) requires the regulatory limit for lead in paint
and other similar surface coatings to be reduced from 0.06% to 0.009% on August 14, 2009. CPSC staff has
concluded that this method is sufficient for either limit.
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2. Component Part – an individual sub-unit within the total sample. Each separate paint
color on a sample is a component part.
3. Composite Testing- like parts – combining like paints from several like parts or products
to obtain sufficient sample size for analysis when there is an insufficient quantity of paint
on one item to perform testing.
4. Composite Testing-different parts – combining different paints (e.g., multiple colors)
from one or more samples to reduce the number of digestions and instrumental lead
analyses performed.
5. Instrument Detection Limit (IDL) – 3 times the standard deviation of 10 replicate
measurements of reagent blank. The IDL for Pb on the Inductively Coupled Plasma
Optical Emission Spectrometer (ICP-OES) used by CPSC staff is 0.01 µg/ml.
6. Method Detection Limit (MDL) – reagent blank fortified with 2-3 times the IDL. Seven
replicate measurements are made. Calculate the MDL as follows: MDL = t x S, t = 3.14
(99% confidence level for 7 replicates), S = standard deviation. The MDL determined for
Pb is 0.01 µg/ml.
7. Laboratory Reagent Blank (LRB) – an aliquot of the digestion reagents that is treated
exactly as a sample including exposure to glassware, digestion media, apparatus, and
conditions used for a particular Pb test, but with no added sample. LRB data are used to
assess contamination from the laboratory environment.
8. Calibration Blank – deionized water acidified with nitric acid (3 ml concentrated nitric
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