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SN/T 4062-2014 English PDF

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SN/T 4062-2014: Determination of rare earth elements in botanic Chinese medicinal material for export
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PDF similar to SN/T 4062-2014


Standard similar to SN/T 4062-2014

GB/T 41907   SN/T 4063   SN/T 4064   SN/T 4061   

Basic data

Standard ID SN/T 4062-2014 (SN/T4062-2014)
Description (Translated English) Determination of rare earth elements in botanic Chinese medicinal material for export
Sector / Industry Commodity Inspection Standard (Recommended)
Classification of Chinese Standard C23
Classification of International Standard 11.120.10
Word Count Estimation 32,326
Date of Issue 12/1/2014
Date of Implementation 5/1/2015
Quoted Standard GB/T 602; GB/T 6682
Regulation (derived from) State-Quality-Inspection-accreditation [2014] 614
Issuing agency(ies) General Administration of Customs
Summary This standard specifies the exports of Chinese herbal medicines in plant scandium (Sc), yttrium (Y), lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho)

SN/T 4062-2014: Determination of rare earth elements in botanic Chinese medicinal material for export


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Determination of rare earth elements in botanic Chinese medicinal material for export People's Republic of China Entry-Exit Inspection and Quarantine Industry Standard Exporting rare earth elements in plant Chinese herbal medicines Method of determining elements Released on.2014-11-19 2015-05-01 implementation People's Republic The General Administration of Quality Supervision, Inspection and Quarantine issued

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. Please note that some of the contents of this document may involve patents. Publication of this document The organization is not responsible for identifying these patents. This standard is proposed and managed by the National Certification and Accreditation Administration. This standard was drafted. Chongqing Entry-Exit Inspection and Quarantine Bureau of the People's Republic of China. The main drafters of this standard. Wang Jing, Zhu Meiwen, Wang Junsu, Peng Guangyu, Zheng Guocan, Chen Jiang. Exporting rare earth elements in plant Chinese herbal medicines Method of determining elements

1 Scope

This standard specifies the export of plant-based Chinese herbal medicines such as sputum (Sc), strontium (Y), strontium (La), strontium (Ce), strontium (Pr), strontium (Nd), strontium (Sm), strontium. Sixteen elements (Eu), 钆Gad, Tb, Dy, Ho, Er, Tm, Yb, Lu Abbreviation Determination of 16 elements by inductively coupled plasma mass spectrometry (ICP-MS) and inductively coupled plasma optical emission spectroscopy (ICP-AES) method. This standard is applicable to the content of 16 rare earth elements in phytochemicals such as ginseng, perilla leaves, honeysuckle, alfalfa, ephedra and cork. Determination.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. Preparation of standard solution for GB/T 602 chemical reagent impurity determination GB/T 6682 Analytical laboratory water specifications and test methods First method inductively coupled plasma mass spectrometry (ICP-MS)

3 Principle

Using nitric acid-hydrogen peroxide as the digestion solution, the sample was subjected to microwave digestion and then transferred to a constant volume to prepare a sample solution. Inductively coupled isotope The mass spectrometer (ICP-MS) was used to detect the content of 16 elements in the sample solution, and then the content of 16 elements in the sample was calculated and calculated. Total amount.

4 reagents

Unless otherwise specified, the reagents used are of excellent grade and the water is the first grade water specified in GB/T 6682. 4.1 Nitric acid. 4.2 30% hydrogen peroxide. 4.3 Digestion solution. Take 2 parts of nitric acid (4.1) and 1 part of hydrogen peroxide (4.2), mix and cool. 4.4 Nitric acid solution (1%, volume fraction). Take 10 mL of nitric acid (4.1) and dilute to 1000 mL with water. 4.5 16 element standard solution. The concentration of Sc standard solution is 1000mg/L (4.5.1), Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, The concentration of Dy, Ho, Er, Tm, Yb, Lu (hereinafter referred to as other 15 kinds of rare earth elements) is 100 mg/L (4.5.2). Can be pressed according to GB/T 602 Method Preparation, or direct use of certified reference materials. 4.6 Internal standard element Indium (In) standard solution. the concentration is 1000mg/L. Prepared according to GB/T 602 method, or directly use certified standards substance. 4.7 16 element standard stock solution. accurately transfer 2.0mLSc standard solution (4.5.1), and 10mL mixed standard solution (4.5.2) in 100mL

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