GB/T 22290-2008 English PDF

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GB/T 22290-2008: Determination of rare earth elements in tea by inductively coupled plasma mass spectrometry
Status: Obsolete

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 22290-2008	239	Add to Cart	2 days	Determination of rare earth elements in tea by inductively coupled plasma mass spectrometry	Obsolete

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Basic data

Standard ID: GB/T 22290-2008 (GB/T22290-2008)
Description (Translated English): Determination of rare earth elements in tea by inductively coupled plasma mass spectrometry
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: X04
Classification of International Standard: 67.140.10
Word Count Estimation: 6,657
Date of Issue: 2008-08-12
Date of Implementation: 2009-03-01
Quoted Standard: GB/T 6682; GB/T 8302; GB/T 8303
Regulation (derived from): National Standard Approval Announcement 2008 No.14 (Total No.127)
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the inductively coupled plasma mass spectrometry (ICP-MS) method for the determination of rare earth elements in tea. This standard applies to rare earth elements in tea scandium, yttrium, lanthanum, cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, Dy, holmium, erbium, thulium, determination of lutetium, ytterbium.

GB/T 22290-2008: Determination of rare earth elements in tea by inductively coupled plasma mass spectrometry

---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 rare earth elements in tea by inductively coupled plasma mass spectrometry ICS 67.140.10 X04 National Standards of People's Republic of China Determination of rare earth elements in tea Inductively Coupled Plasma Mass Spectrometry Posted 2008-08-12 2009-03-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

The standard proposed by China Federation of Supply and Marketing Cooperatives. This standard by the National Standardization Technical Committee of tea. This standard was drafted. inspection by the Fujian Provincial Center. The main drafters of this standard. Zheng Xiao Yan, Huang Hongxia, Lin Song, Qiuxiu Yu, Chen Xiangjun, Libang into. Determination of rare earth elements in tea Inductively Coupled Plasma Mass Spectrometry

1 Scope

This standard specifies the inductively coupled plasma mass spectrometry (ICP-MS) method method for the determination of rare earth elements in tea. This standard applies to tea rare earth elements scandium (Sc), yttrium (Y), lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), samarium (Sm), europium (Eu), Gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium (Lu) measurement. In the sample probe amount of 2g, constant volume when the volume is 25mL, the present standard methods of the rare earth element minimum detectable concentration (ng/g), respectively It is. Sc, 0.9; La, 0.3; Y, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu are 0.1.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 6682 analytical laboratory use specifications and test methods (GB/T 6682-2008, ISO 3696. 1987, MOD) GB/T 8302 sampling tea GB/T 8303 Tea Preparation and grated dry matter content of the measurement sample (GB/T 8303-2002, eqv ISO 1572. 1980)

3 Terms and Definitions

The following terms and definitions apply to this standard. 3.1 Class Ⅲ deputy general periodic table elements scandium, yttrium and the lanthanides. Principle 4 After the sample is treated to the test solution into the inductively coupled plasma mass spectrometer, under high temperature plasma by desolvation atom , Post ionization enter the mass spectrometer, with a value proportional to the concentration of analyte in its CPS (countpersecond), by measuring CPS to determine the value of each sample was measured REE contents.

5 Reagents

5.1 glassware used must be made in 20% nitric acid soak overnight, rinse with water repeatedly. All tests are water GB/T 6682 Predetermined level of water. 5.2 Nitric acid. pure class distinctions. Nitric acid solution was 5.3 (volume fraction of 2%). Take 20mL of nitric acid (5.2), diluted to 1000mL. 5.4 nitric acid solution (1 + 1). Take 50mL of nitric acid (5.2) was added to 50mL of water. 5.5 hydrochloride. pure class distinctions. 5.6 hydrochloric acid solution (1 + 1). Take 50mL of hydrochloric acid (5.5) was added to 50mL of water. 5.7 16 kinds of rare earth elements (Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu) mixed standard stock solution (10mg/L), the choice of the appropriate concentrations of certified standard solution mixed. ......

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