GH/T 1081-2012 English PDF (GHT1081-2012)

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GH/T 1081-2012: Determination of poplar tree gum in propolis - Reversed-phase high performance liquid chromatography method
GH/T 1081–2012
GH
ICS 85.140
B 47
Record No.. 37255-2012
SUPPLY AND MARKETING COOPERATIVES INDUSTRY
STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA
Determination of Poplar Tree Gum in Propolis —
Reversed-phase High Performance Liquid
Chromatography Method
ISSUED ON. JULY 09, 2012
IMPLEMENTED ON. AUGUST 01, 2012
Issued by. China Federation of Supply and Marketing Cooperatives
Table of Contents
Foreword ... 3 
Introduction ... 4 
1 Scope ... 5 
2 Normative references ... 5 
3 Terms and definitions ... 5 
4 Principles ... 6 
5 Reagents and materials ... 7 
6 Instruments and devices ... 7 
7 Sampling and sample pre-treatment ... 8 
8 Test method ... 8 
Annex A ... 10 
Annex B ... 11 
Annex C ... 14 
Foreword
This Standard is prepared according to GB/T 1.1-2009 “Directives for
Standardization - Part 1. Rules For the Structure and Drafting of Standards”.
This products uses patent 201010180675.0 (application number) .
This Standard was proposed by Zhejiang University.
This product shall be under the jurisdiction of China Federation of Supply and
Marketing Cooperatives.
Drafting organizations of this Standard. Zhejiang University, and China Beer
Products Association.
Main drafters of this Standard. Hu Fuliang, Zhang Cuiping, Zheng Huoqing,
and Lv Zetian.
Introduction
Issuing organization of this Document draws attention to that – when declaring
compliance with this Document, it involves the uses of patent application
related to this Document (application number. 201010180657.0).
Issuing organization of this Document has no standpoint for authenticity,
validity and scope of this patent application.
The patent applicant has assured the issuing organization of this Document
that he is willing to negotiate with any applicant for the relevant license
authorization under reasonable and non-discriminatory terms and conditions.
Statements of the patent applicant have been put on records at issuing
organization of this Document. Relevant information can be obtained via
following contact information.
Patent applicant. Zhejiang University.
Address. No. 866 Yuhangtang Road, Xihu District, Hangzhou City, Zhejiang
Province.
Please note that except above-mentioned patent application, certain content of
this Document may also involve patent [Translator note. other patents]. The
issuing organization of this Document does not undertake the responsibility for
identification of these patents.
Determination of Poplar Tree Gum in Propolis -
Reversed-phase High Performance Liquid Chromatography Method
1 Scope
This Standard specifies determination method of reversed-phase high
performance liquid chromatography on whether propolis contains poplar tree
gum.
This Standard applies to the determination of poplar tree gum in propolis raw
materials and in propolis ethanol extract.
In this Standard, when injection volume is 5 μL, minimum detection limit of
salicin is 1.3 μg/mL; lower detection limit of poplar tree gum in propolis raw
material is about 5%; lower detection limit of ethanol in extract of propolis is
about 15%.
2 Normative references
Following documents are indispensable for application of this Document. For
the dated documents so quoted, only the dated versions apply to this
document. For the undated documents so quoted, the latest versions
(including all corrigendum) apply to this Document.
GB/T 6682-2008 Water for analytical laboratory use - Specification and
test methods
GB/T 24282-2009 Propolis
3 Terms and definitions
Following terms and definitions apply to this document.
3.1
Propolis
Glutinous substance formed by mixing of resin secretions, etc. collected by
worker bees and its palate gland and wax gland secretions, etc.
3.2
Salicin content (X) in test sample is expressed in milligrams per gram (mg/g)
and calculated according to Formula (1).
Where.
Cs — Concentration of salicin standard solution, in milligrams per milliliter
(mg/mL);
V — Final constant volume of sample, in milliliters (mL);
A — Corresponding peak height or peak area of sample solution;
m — Sample mass, in grams (g);
As — Corresponding peak height or peak area of salicin standard solution.
Take arithmetic average value of 2 independent measured values that meet
repeatability requirements AS the determination result (mg/g). Maintain 2
significant figures. Relative deviation of parallel test must not exceed 2.0%.
8.5 Results determination
Salicin and CCP measured in this Standard are substances that are contained
in Poplar tree gum but not in propolis. If salicin is undetectable in test sample
or salicin detected concentration in ethanol extracted propolis is less than
0.25mg/g, or the salicin concentration detected in propolis raw material sample
is less than 0.15mg/g or CCP is undetectable, then this sample is the sample
in which the poplar gum tree is undetectable. If salicin concentration detected
in ethanol extracted propolis is greater than 0.25mg/g or salicin concentration
detected in propolis raw material sample is greater than 0.15mg/g, then,
regardless of whether CCP is detectable, this sample is determined to be the
sample in which poplar tree gum is detectable. If salicin is undetectable in test
sample while CCP is detectable, then use liquid chromatography tandem mass
spectrometry for further verification (detection conditions of liquid
chromatogram and are shown in Annex C). If CCP is determined, then this
sample is determined to be the sample in which the poplar tree gum is
detectable.
Annex C
(Informative Annex)
CCP Determination Conditions Determined by Liquid Chromatography
Tandem Mass Spectrometry
C.1 Liquid chromatography
C.1.1 Chromatographic column. Sepax HP-C18 (150 mm×4.6mm, 5 μm).
C.1.2 Mobile phase. Acetonitrile. 0.2% formic acid= 5.95.
C.1.3 Column temperature. 30°C.
C.1.4 Injection volume. 100μL.
C.1.4 Flow rate. 1 ml/min.
C.2 Mass spectrum conditions
C.2.1 Scan mode. negative ion sweeping.
C.2.2 Drying gas flow rate. 12.0L/min.
C2.3 Nebulizer pressure. 344.7 kPa (50 psi).
C2.4 Drying temperature. 350 °C.
C.2.5 Capillary voltage. positive ion 4 000 V; negative ion 3 500 V.
C2.6 Lysis voltage. 100 V.