Section 25214.4 Of Article 10.1.1. Metal-containing Jewelry From California Health And Safety Code >> Division 20. >> Chapter 6.5. >> Article 10.1.1.
25214.4
. The test methods for determining compliance with this
article shall be conducted using the EPA reference methods 3050B,
3051A, and 3052, as specified in EPA Test Methods for Evaluating
Solid Waste, Physical/Chemical Methods, SW-846 (Third Edition, as
currently updated) for the material being tested, except as otherwise
provided in Sections 24214.4.1 and 25214.4.2, and in accordance with
all of the following procedures:
(a) When preparing a sample, the laboratory shall make every
effort to ensure that the sample removed from a jewelry piece is
representative of the component to be tested, and is free of
contamination from extraneous dirt and material not related to the
jewelry component to be tested.
(b) All jewelry component samples shall be washed prior to testing
using standard laboratory detergent, rinsed with laboratory reagent
grade deionized water, and dried in a clean ambient environment.
(c) If a component is required to be cut or scraped to obtain a
sample, the metal snips, scissors, or other cutting tools used for
the cutting or scraping shall be made of stainless steel and washed
and rinsed before each use and between samples.
(d) A sample shall be digested in a container that is known to be
free of lead and cadmium and with the use of an acid that is not
contaminated by lead or cadmium, including analytical reagent grade
digestion acids and reagent grade deionized water.
(e) Method blanks, consisting of all reagents used in sample
preparation handled, digested, and made to volume in the same exact
manner and in the same container type as samples, shall be tested
with each group of 20 or fewer samples tested.
(f) The results for the method blanks shall be reported with each
group of sample results, and shall be below the stated reporting
limit for sample results to be considered valid.
(g) Test methods selected shall be those that best demonstrate
they can achieve total digestion of the sample material being
analyzed. Test methods shall not be used if they are inconsistent
with the specified application of the test method or do not
demonstrate the best performance or proficiency for achieving total
digestion of the sample material.