BS ISO 10727:2002

$102.76

Tea and instant tea in solid form. Determination of caffeine content. Method using high-performance liquid chromatography

Published By	Publication Date	Number of Pages
BSI	2002	16

Guaranteed Safe Checkout

Categories: 67.140.10 - Tea, BSI

If you have any questions, feel free to reach out to our online customer service team by clicking on the bottom right corner. We’re here to assist you 24/7.
Email:[email protected]

Description

This International Standard specifies a method for the determination by high-performance liquid chromatography (HPLC) of the caffeine content of teas and instant teas. It is applicable to green tea, black tea and decaffeinated tea products.

PDF Catalog

PDF Pages	PDF Title
3	TitlePage – Tea and instant tea in solid form�— Determination of caffeine content�— Method using …
5	Foreword – Foreword
7	Scope – 1�� Scope NormativeReference – 2�� Normative references Clause1 – 3�� Principle Clause1 – 4�� Reagents UntitledSubclause2 – 4.1�� Water UntitledSubclause2 – 4.2�� Methanol UntitledSubclause2 – 4.3�� Mobile phase UntitledSubclause2 – 4.4�� Ethanol/water mixture
8	UntitledSubclause2 – 4.5�� Magnesium oxide UntitledSubclause2 – 4.6�� Caffeine stock standard solution UntitledSubclause2 – 4.7�� Caffeine standard solutions UntitledSubclause3 – 4.7.1�� Caffeine standard solution�A UntitledSubclause3 – 4.7.2�� Caffeine standard solution�B UntitledSubclause3 – 4.7.3�� Caffeine standard solution�C UntitledSubclause3 – 4.7.4�� Caffeine standard solution�D Clause1 – 5�� Apparatus UntitledSubclause2 – 5.1�� High-performance liquid chromatograph UntitledSubclause2 – 5.2�� Chromatographic column for HPLC
9	UntitledSubclause2 – 5.3�� Filter UntitledSubclause2 – 5.4�� Electric heating mantle UntitledSubclause2 – 5.5�� Flask UntitledSubclause2 – 5.6�� Anti-bumping granules UntitledSubclause2 – 5.7�� Condenser UntitledSubclause2 – 5.8�� Analytical balance Clause1 – 6�� Sampling Clause1 – 7�� Preparation of test sample Clause1 – 8�� Procedure Subclause2 – 8.1�� General Subclause2 – 8.2�� Determination of dry matter content
10	Subclause2 – 8.3�� Test portion Subclause3 – 8.3.1�� Green tea and black tea Subclause3 – 8.3.2�� Instant tea Subclause2 – 8.4�� Extraction of caffeine UntitledSubclause3 – 8.4.1�� Add, to the tea in the flask, UntitledSubclause3 – 8.4.2�� Mix the contents. Attach the condenser ( UntitledSubclause3 – 8.4.3�� Remove the flask and contents from the heating mantle and cool to r… UntitledSubclause3 – 8.4.4�� Leave the flask to stand to allow the contents to settle, then remo… Subclause2 – 8.5�� Dilution Subclause2 – 8.6�� Determination Subclause3 – 8.6.1�� Adjustment of the apparatus Subclause3 – 8.6.2�� HPLC analysis
11	Clause1 – 9�� Calculation Clause1 – 10�� Precision Subclause2 – 10.1�� Interlaboratory test
12	Subclause2 – 10.2�� Repeatability Subclause2 – 10.3�� Reproducibility Clause1 – 11�� Test report
13	AnnexInformative – Results of interlaboratory test
14	Bibliography – Bibliography

Additional information

Status	Under Review
Pages	16
Publication Date	2002-08-21
ISBN	0 580 39223 6
Standard Number	BS ISO 10727:2002
Title	Tea and instant tea in solid form. Determination of caffeine content. Method using high-performance liquid chromatography
Identical National Standard Of	ISO 10727:2002
Replaces	BS 7820-1:1995
Descriptors	Caffeine, Food testing, Determination of content, Food products, Liquid chromatography
Publisher	BSI
Committee	AW/8
ICS Codes	67.140.10 - Tea

Preview PDF


PDF Format	Searchable	Printable	Preview Now

BS ISO 10727:2002

PDF Catalog

Related products