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SN/T 4697-2016 English PDF

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SN/T 4697-2016: Determination of Mercury in paper based packaging - Direct mercury determining with solid injection method
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PDF similar to SN/T 4697-2016


Standard similar to SN/T 4697-2016

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Basic data

Standard ID SN/T 4697-2016 (SN/T4697-2016)
Description (Translated English) Determination of Mercury in paper based packaging - Direct mercury determining with solid injection method
Sector / Industry Commodity Inspection Standard (Recommended)
Classification of Chinese Standard A82
Word Count Estimation 6,615
Date of Issue 2016-12-12
Date of Implementation 2017-07-01
Regulation (derived from) State-Quality-Inspection-Accredidation (2016) No.590
Issuing agency(ies) General Administration of Customs

SN/T 4697-2016: Determination of Mercury in paper based packaging - Direct mercury determining with solid injection method


---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Determination of Mercury in paper based packaging-Direct mercury determining with solid injection method People's Republic of China Exit Inspection and Quarantine standards Determination of mercury content in paper packages Solid sample direct mercury measurement 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. Please note that some of this document may be patentable. The release of this document The agency does not assume responsibility for identifying these patents. 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. Zhang Miao, Xu Jian, Wang Hui, Xu Hongmin, Tao Lin, Zhang Li, Xiang Haibo, Sun Jizan. Determination of mercury content in paper packages Solid sample direct mercury measurement

1 Scope

This standard specifies the mercury content of paper packaging in the direct determination of solid samples. This standard applies to the determination of mercury content in paper packaging.

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 6379.2 accuracy of measurement methods and results (accuracy and precision) Part 2. Determination of standard measurement methods repeated The basic method of sexuality and reproducibility GB/T 6682 analytical laboratory water specifications and test methods GB/T 22804 Determination of mercury content in pulp, paper and board

3 principle

Mercury vapor on the resonance wavelength of 253.7nm strong absorption. Samples were dried and decomposed, and then by the catalyst, after the homogeneous reaction, like The mercury in the product is converted to elemental mercury which is carried by the carrier gas into the detector. Within a certain range, its absorption value is proportional to the mercury content, compared with the standard curve More quantitative.

4 Reagents and materials

Unless otherwise specified, the reagents used are excellent pure, experimental water should be used in line with a water GB/T 6682 provisions. 4.1 Nitric acid (HNO3) .ρ = 1.42g/mL, the mass fraction is 65% to 68%. 4.2 Nitric acid (HNO3) solution 50 mL of nitric acid (4.1) is added to a volume of 950 mL of water. 4.3 Mercury standard stock solution (100mg/L) Weigh 0.162g mercury nitrate (HgNO3) in a beaker, add a certain amount of nitric acid solution (4.2) Solution, and then all transferred to 1L volumetric flask, with nitric acid solution (4.2) fixed to the mark, the solution stored in airtight polyethylene container. Or adopted National recognized valid period of the certified reference material. 4.4 standard solution (1mg/L) Accurate removal of mercury standard stock solution (4.3) 10.0mL in 1000mL volumetric flask to nitric acid solution (4.2) set the volume to the mark, shake stand-by. 4.5 Series Standard Working Solution 1. Accurate Pipette 0.0mL, 0.25mL, 0.5mL, 1.0mL, 1.5mL and 2.0mL standard solution Liquid (4.4) in 100mL volumetric flask to nitric acid solution (4.2) volume to the mark, the series of standard working solution concentrations were 0.0ng / mL, 2.5 ng/mL, 5.0 ng/mL, 10.0 ng/mL, 15.0 ng/mL and 20.0 ng/mL. 4.6 series of standard working solution 2. Pipette accurately 0.0ng/mL, 2.0ng/mL, 3.0ng/mL, 5.0ng/mL, 10.0ng/mL, 15.0ng/mL, 20.0ng/mL, 30.0ng/mL, 50.0ng/mL and 80.0ng/mL standard solution in a 100mL volumetric flask, Acid solution (4.2) to volume, the standard working solution concentrations were 0.0ng/mL, 20.0ng/mL, 30.0ng/mL, 50.0 ng/mL, 100.0 ng/mL, 150.0 ng/mL,.200.0 ng/mL, 300.0 ng/mL, 500.0 ng/mL and 800.0 ng/mL.

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