GB/T 37647-2019 English PDF (GBT37647-2019)

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GB/T 37647-2019: Toy and children product -- General principles for migration test of certain elements
GB/T 37647-2019
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 97.200.50
Y 57
Toy and children product - General principles for
migration test of certain elements
ISSUED ON: JUNE 04, 2019
IMPLEMENTED ON: JANUARY 01, 2020
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Terms and definitions ... 4 
4 Overview ... 7 
5 Reagents and materials ... 7 
6 Instruments ... 8 
7 General principles for sweat migration test model ... 9 
8 General principles for saliva migration test model ... 13 
9 General principles for gastric juice migration test model ... 16 
10 Test report ... 19 
Appendix A (Informative) Selection guidance for migration test models ... 20 
Appendix B (Informative) Selection guidance for test method (gravimetric
method and area method) ... 25 
Appendix C (Informative) Technical information of migration test model ... 28 
References ... 30 
Toy and children product - General principles for
migration test of certain elements
1 Scope
This Standard specifies the sampling method, sample preparation and sample
extraction method for the migration test of certain elements in toy and children
product in the simulated human environment.
This Standard applies to the pretreatment of migration test of certain elements,
such as aluminum, antimony, arsenic, barium, boron, cadmium, chromium,
cobalt, copper, lead, manganese, mercury, nickel, selenium, strontium, tin, zinc,
in toy and children product in the simulated human environment (including
sweat, saliva, and gastric juice environments). Migration tests of other certain
elements can be performed with reference to this Standard after verification.
This Standard does not apply to the toy or children product which is clearly
excluded from the possibility of being sucked, licked, chewed, swallowed or
exposed to the skin for a long term, due to its accessibility, function, mass, size
or other characteristics, in consideration of children's normal use and
foreseeable behavior.
2 Normative references
The following documents are indispensable for the application of this document.
For dated references, only the dated version applies to this document. For
undated references, the latest edition (including all amendments) applies to this
document.
GB 6675.1-2014, Toys safety - Part 1: Basic code
GB 6675.2, Safety of toys - Part 2: Mechanical and physical properties
GB 6675.4-2014, Safety of toys - Part 4: Migration of certain elements
GB/T 6682, Water for analytical laboratory use - Specification and test
methods
3 Terms and definitions
Terms and definitions determined by GB 6675.1-2014, GB 6675.4-2014 and the
following ones are applicable to this document. For ease of use, some of the
3.8 Reasonably foreseeable abuse
The possible way of use, which uses toy and children product in ways that are
not recommended by the supplier, but may occur under normal circumstances,
including the normal free behavior of children by combining toys and children
products.
Examples: dismantle, drop, or use toy and children product in non-
recommended ways.
Note: Rewrite GB 6675.1-2014, definition 3.17.
3.9 Sample area
The area of the test sample, which is immersed in the test solution, that is in
contact with the solution and is not covered.
3.10 Base material
The material, on which coating can form or adhere to the surface.
[GB 6675.4-2014, definition 3.1]
3.11 Coating
All material layers that are formed or attached to the base material of the toy
and children product.
Examples: paint, varnish, lacquer, ink, polymer, metal particle or other similar
substances that are attached to the base material.
Note: Rewrite GB 6675.4-2014, definition 3.2.
3.12 Paper and paperboard
Paper and paperboard whose maximum mass per unit area is not more than
400 g/m2.
Note: paper and paperboard whose mass per unit area exceeds 400 g/m2 shall
be treated as "other materials", and may also be fiberboard or cardboard.
[GB 6675.4-2014, definition 3.5]
3.13 Scraping
The mechanical process of separating the coating from the base material,
which shall not scrap the base material.
[GB 6675.4-2014, definition 3.6]
5.5 Ammonia water: the mass fraction is 25%, ρ = 0.91 g/mL.
5.6 Dilute ammonia water: the mass fraction is 1%.
5.7 Sodium hydroxide (NaOH): c (NaOH) ≈ 0.1 mol/L.
5.8 Magnesium chloride hexahydrate (MgCl2·6H2O).
5.9 Calcium chloride dihydrate (CaCl2·2H2O).
5.10 Dipotassium hydrogen phosphate trihydrate (K2HPO4·3H2O).
5.11 Potassium carbonate (K2CO3).
5.12 Potassium chloride (KCl).
5.13 Hydrochloric acid: the mass fraction is 37%.
5.14 N-heptane: chemically pure; the mass fraction is not less than 99%.
5.15 Hydrochloric acid solution: c (HCl) = (0.07 ± 0.005) mol/L.
5.16 Hydrochloric acid solution: c (HCl) = (0.14 ± 0.010) mol/L.
5.17 Hydrochloric acid solution: c (HCl) ≈ 2 mol/L.
5.18 Hydrochloric acid solution: c (HCl) ≈ 6 mol/L.
5.19 Hydrochloric acid solution: the mass fraction is 1%.
5.20 Unless otherwise specified, use only analytical reagents or reagents above
the grade.
6 Instruments
6.1 Test sieve: plain stainless-steel wire mesh sieve; the rated aperture is 0.5
mm.
6.2 pH meter: the accuracy is not less than ± 0.1pH unit; it shall be prevented
from cross-contamination.
6.3 Membrane filter: the pore size is 0.22 μm and 0.45 μm.
6.4 Centrifuge: the centrifugal capacity is (5 000 ± 500) g (g = 9.806 65 m/s2).
6.5 Constant-temperature oscillator: the temperature is constant at (37 ± 2) °C
during oscillation; the oscillation frequency accuracy is not less than ±5
times/min.
physical separation methods (those caused by reasons such as dot dyeing,
printing textiles or quality restrictions).
Note: It does not exclude the acquisition of any form of reference sample, as
long as the reference sample can represent the relevant toy and children
product material and the basic materials that are attached to them as
specified above.
If the material mass is 10 mg ~ 100 mg, it shall be processed and calculated as
100 mg of test sample. The sample whose mass is less than 10 mg can be
exempted from testing or tested by area method.
7.3.2 Sample preparation
7.3.2.1 Coating
At room temperature, adopt the method of scraping to obtain coating from the
sample of toy and children product; pulverize the sample under the condition
that does not exceed the ambient temperature. Obtain not less than 100 mg of
coating test sample as much as possible from the materials that pass through
a test sieve whose pore size is 0.5 mm (see 6.1).
For coatings that cannot be pulverized due to their own characteristics (such as
elastic/ plastic paint), transfer the test sample directly from the sample without
pulverizing the coating.
7.3.2.2 Other materials
Try to remove not less than 100 mg of test sample as much as possible; avoid
material heating when removing. The test sample shall be cut from the smallest
thickness of the material section, so as to ensure that the ratio of the test sample
area to the test sample mass is as large as possible. The dimensions of each
test sample in any direction shall not be greater than 6 mm in the uncompressed
state.
If the material is spot-dyed or printed textile, the removed test sample shall...