GB/T 32448-2015 in English
VALIDDetermination of the heavy metal Pb,Cr,Cd,Ba,Hg,As,Se,Sb dissolved in adhesives
- Issued on:2015-12-31
- Implemented on:2016-07-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$156.00
《GB/T 32448-2015胶粘剂中可溶性重金属铅、 铬、 镉、 钡、 汞、 砷、 硒、 锑的测定》由TC185（全国胶粘剂标准化技术委员会）归口，主管部门为中国石油和化学工业联合会。
本标准规定了胶粘剂中可溶性重金属铅、铬、镉、钡、汞、砷、硒、锑的含量测定方法。
本标准适用于胶粘剂中可溶性重金属铅、铬、镉、钡、汞、砷、硒、锑含量测定。
本标准中的方法检出限:铅:2.5 μg/kg;铬:4.0 μg/kg;镉:0.5 μg/ kg;钡:10 μg/kg;汞:0.15μg/kg;砷:1.0μg/kg;硒:1.0μg/kg;锑:1.0μg/kg。
Introduction
Interpretation of GB/T32448—2015 National Standard of the People's Republic of China
This standard specifies the determination method of soluble heavy metals lead, chromium, cadmium, barium, mercury, arsenic, selenium and antimony in adhesives, and is applicable to the quality inspection of various adhesive products.
Background and significance of standard formulation
With the enhancement of environmental awareness and people's increasing concern for health and safety, the problem of heavy metal residues in adhesives has become the focus of the industry. The formulation of this standard fills the gap in the field of soluble heavy metal detection in adhesives at home and abroad, and provides a technical basis for ensuring product quality and environmental protection.
Comparison of Determination Method Framework
| Project Dimensions | Graphite Furnace Atomic Absorption Spectrometry (Lead, Chromium, Cadmium, Barium) | Hydride Atomic Fluorescence Spectrometry (Mercury, Arsenic, Selenium, Antimony) |
|---|---|---|
| Technical Principle | Heavy metals are extracted by soaking in 4% acetic acid solution, and the absorbance is measured using a graphite furnace atomizer. | The heavy metal elements in the test solution are reduced to gaseous hydrides using potassium borohydride, and the fluorescence intensity of the characteristic wavelength is detected in a fluorescence spectrometer. |
| Scope of Application | Determination of high-valent metal elements such as lead, chromium, cadmium, and barium. | Determination of non-metallic and metalloid elements such as mercury, arsenic, selenium and antimony. |
| Detection sensitivity | Lead: 2.5 μg/kg; chromium: 4.0 μg/kg; cadmium: 0.5 μg/kg; barium: 10 μg/kg. | Mercury: 0.15 μg/kg; arsenic: 1.0 μg/kg; selenium: 1.0 μg/kg; antimony: 1.0 μg/kg. |
Instrument and reagent requirements
Atomic absorption spectrometer (AAS): equipped with graphite furnace atomizer and hollow cathode lamps for lead, cadmium, chromium and barium.
Atomic Fluorescence Spectrometer (AFS): Equipped with mercury, arsenic, selenium, and antimony hollow cathode lamps for trace metal detection.
High-speed pulverizer: Used for sample pretreatment.
Implementation recommendations and precautions
Laboratory conditions requirements
- Analysts must undergo professional training and be familiar with the operation of relevant testing equipment.
- The laboratory should be equipped with reagents and instruments that meet the standards and establish a complete quality control system.
- Care should be taken to avoid contamination during sample pretreatment, and it is recommended to operate in an ultra-low temperature environment.
Actual application case
A certain adhesive manufacturer used this standard method to test its products and found that its lead content exceeded the standard. By optimizing the production process and raw material procurement, the heavy metal residues were significantly reduced, and finally met the national standards.
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