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SN/T 4693-2016: Determination of asbestos in domestic latex products - Polarized light microscope method
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SN/T 4693-2016: Determination of asbestos in domestic latex products - Polarized light microscope method

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Determination of asbestos in domestic latex products-Polarized light microscope method People's Republic of China Exit Inspection and Quarantine standards Determination of asbestos in consumer latex consumer products Polarized light microscopy 2016-12-12 released 2017-07-01 implementation People's Republic of China General Administration of Quality Supervision, Inspection and Quarantine released

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard is proposed and managed by the National Certification and Accreditation Administration Committee. This standard was drafted by Shandong Entry-Exit Inspection and Quarantine Bureau, People's Republic of China. The main drafters of this standard. Li Yanqiu, Xu Xiaoming, Mao Chengtao, Wangzhao Kun, Liu Yilong, Liu Jingjie, Zhang Jianwen. Determination of asbestos in consumer latex consumer products Polarized light microscopy

1 Scope

This standard specifies the day-to-day latex consumer products in asbestos, asbestos, crocidolite, tremolite, Yang stone and amphibole asbestos fiber polarized light Qualitative methods of microscopy. This standard applies to the daily latex consumer goods asbestos, asbestos, crocidolite, tremolite, Yang stone and amphibole asbestos fiber qualitative Determination.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this article Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 6682 analytical laboratory water specifications and test methods GB/T 24665 polarizing microscope

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 Asbestos A natural fibrous silicate mineral divided into fibrous serpentine and fibrous amphibole minerals, including chrysotile, amosite, bluestone Cotton, actinolite, tremolite, and amphibole, with an aspect ratio greater than 3. 1. 3.2 Polarized light microscope Use up and down polarizer to make the light source into polarized light and transparent mineral and gem microscopic observation, analysis and identification of a Species of optical microscope, usually by the eyepiece, objective, under the polarizer (polarizer), the upper polarizer (analyzer or analyzer), compensator, stage, Burson-mirror and condenser and other components. 3.3 Complementarity compensator Known luminous body elliptical radius azimuth, name and optical path difference of the mineral with a special metal frame inlaid, called the complementary color filter, the most Commonly used color picker for mica board, gypsum board and quartz wedge.

4 method summary

The samples were removed by ashing to remove the organic matter, and the resulting samples were homogenized to be analyzed for analysis under a polarizing microscope. Morphology, color, multi-color Sex, extinction angle, ductility and other indicators to confirm whether asbestos fibers and determine the type. ...