GB/T 22930.1-2021 English PDF (GBT22930.1-2021)

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GB/T 22930.1-2021: Leather and fur - Chemical determination of metal content - Part 1:Extractable metals
GB/T 22930.1-2021
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 59.140.30
CCS Y 46
Partially replacing GB/T 22930-2008
Leather and Fur - Chemical Determination of Metal Content
- Part 1: Extractable Metals
(ISO 17072-1:2019 Leather - Chemical Determination of Metal Content - Part 1:
Extractable Metals, MOD)
ISSUED ON: OCTOBER 11, 2021
IMPLEMENTED ON: MAY 1, 2022
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3 
Introduction ... 6 
1 Scope ... 7 
2 Normative References... 7 
3 Terms and Definitions ... 8 
4 Principle ... 8 
5 Reagents and Materials ... 8 
6 Instruments and Equipment ... 9 
7 Sampling and Preparation of Specimens ... 10 
8 Test Procedures ... 10 
9 Calculation and Result Expression ... 12 
10 Test Report ... 14 
Appendix A (Informative) Structural Changes of this Document Compared to ISO
17072-1:2019 ... 15 
Appendix B (Informative) Technical Differences between this Document and ISO
17072-1:2019 and Causes for these Differences ... 16 
Appendix C (Normative) Preparation of Standard Solution and Standard Working
Solution of Elements to be Tested ... 20 
Appendix D (Informative) ICP-OES Element Determination Wavelengths and Inter-
element Interference ... 22 
Appendix E (Informative) ICP-MS Analytical Isotopes and Method Detection Limits
... 24 
Appendix F (Informative) AAS Element Determination Wavelengths and
Recommended Test Conditions ... 25 
Appendix G (Informative) Inter-laboratory Result Comparison and Detection Limits
... 26 
Bibliography... 28 
Introduction
During the processing of leather and fur, the traditional tanning process and the tanning agents,
dyes, auxiliaries and pigments used in the processing may result in leather, fur and their
products containing a certain amount of metal elements. In particular, heavy metals, such as:
arsenic, cadmium, chromium, mercury, lead, antimony, selenium and nickel, which can
penetrate into the human body through the immersion of perspiration through the skin, which
will severely endanger human health. Furthermore, with the continuous development of the
leather and fur industry at the current stage, people have been paying increasing attention to the
types and contents of metals that may be contained in their products, and the determination of
metal contents in leather and fur has also increasingly become the focus of product quality
control. GB/T 22930, which aims to provide a basis for the determination of metal contents in
leather and fur, is intended to be composed of two parts.
---Part 1: Extractable Metals. The purpose is to establish a method of determining 22
extractable metals in leather and fur.
---Part 2: Total Metal Content. The purpose is to establish a method of determining the
total amount of 24 metals in leather and fur.
The determination of metal content (especially some heavy metals) in leather and fur has always
been the focus of the industry. In 2008, China has issued a standard on the test methods GB/T
22930-2008 Leather and Fur - Chemical Tests - Determination of Heavy Metal Content, which
specifies the method of determining the total amount and extractable amount of 9 heavy metal
elements, such as: lead (Pb), cadmium (Cd) and nickel (Ni). It has been over a decade since
GB/T 22930-2008 was issued and implemented. During this period, with the continuous update
of leather and fur technology, and the application of various new materials, there have been an
increasing number of metal types that may exist in leather and fur, and the determination of
their contents has also attracted increasing attention. First of all, when the current national
standard of China was formulated, there was no relevant international standard. The standard
was independently formulated in combination with the actual situation in China. With the
gradual deepening of international trade, it has gradually been unable to satisfy the demands of
the industry. Secondly, the method standards regarding the determination of metal contents in
leather and fur have been internationally established. Not only are there more types of metals
that can be determined, but also the methods have been further refined. The determination of
metal contents is divided into two parts: extractable metals and total metal content, which is
more consistent with the current demands of the tests of leather and fur. In view of this, it is
indeed necessary to revise and further improve GB/T 22930, so as to continuously adapt to the
new changes of domestic and overseas products, and the new demands for product testing, and
ensure that the standards are in harmony with the development of the industry.
Leather and Fur - Chemical Determination of Metal Content
- Part 1: Extractable Metals
WARNING: the concentrated acids used in this document are all highly corrosive and /
or oxidizing liquids. If they come into contact with flammable substances, they will
increase the possibility of combustion or explosion, and cause acute or chronic health
hazards to the human body. In addition, there are also hazards to the water body. During
the test, necessary safety measures shall be taken.
1 Scope
This document describes the test methods for 22 extractable metal contents: aluminum (Al),
arsenic (As), barium (Ba), calcium (Ca), cadmium (Cd), cobalt (Co), chromium (Cr), copper
(Cu), iron (Fe), potassium (K), magnesium (Mg), lead (Pb), manganese (Mn), molybdenum
(Mo), nickel (Ni), mercury (Hg), antimony (Sb), selenium (Se), tin (Sn), titanium (Ti), zinc (Zn)
and zirconium (Zr).
This document is applicable to the determination of 22 extractable metal contents in various
types of leather and fur, as well as the determination of extractable chromium in chrome-tanned
leather.
2 Normative References
The contents of the following documents constitute indispensable clauses of this document
through the normative references in the text. In terms of references with a specified date, only
versions with a specified date are applicable to this document. In terms of references without a
specified date, the latest version (including all the modifications) is applicable to this document.
GB/T 3922 Textiles - Testing Method for Color Fastness to Perspiration (GB/T 3922-2013, ISO
105-E04:2013, MOD)
GB/T 6682 Water for Analytical Laboratory Use - Specification and Test Methods (GB/T 6682-
2008, ISO 3696:1987, MOD)
GB/T 39364 Leather - Chemical, Physical, Mechanical and Fastness Tests - Sampling Location
(GB/T 39364-2020, ISO 2418:2017, MOD)
QB/T 1267 Fur - Chemical, Physical and Mechanical and Fastness Tests - Sampling Location
(QB/T 1267-2012, ISO 2418:2002, MOD)
QB/T 1272 Leather - Chemical Tests - Preparation of Chemical Test Samples (QB/T 1272-2012,
ISO 4044:2008, MOD)
QB/T 1273 Fur - Chemical Tests - Determination of Volatile Matter (QB/T 1273-2012, ISO
4684:2005, MOD)
QB/T 1276 Fur - Chemical Tests - Determination of Matter Soluble in Carbon Tetrachloride
(QB/T 1276-2012, ISO 4048:2008, MOD)
QB/T 2716 Leather - Preparation of Chemical Test Samples (QB/T 2716-2018, ISO 4044:2008,
MOD)
QB/T 2717 Leather - Chemical Tests - Determination of Volatile (QB/T 2717-2018, ISO
4684:2005, MOD)
QB/T 2718 Leather - Chemical Tests - Determination of Matter Soluble in Dichloromethane
(QB/T 2718-2018, ISO 4048:2008, MOD)
3 Terms and Definitions
This document does not hav...