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BS ISO 10727:2002

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
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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.

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PDF Pages PDF Title
3 TitlePage – Tea and instant tea in solid formļæ½ā€” Determination of caffeine contentļæ½ā€” Method using …
5 Foreword – Foreword
7 Scope – 1ļæ½ļæ½ļæ½ Scope
NormativeReference – 2ļæ½ļæ½ļæ½ Normative references
Clause1 – 3ļæ½ļæ½ļæ½ Principle
Clause1 – 4ļæ½ļæ½ļæ½ Reagents
UntitledSubclause2 – 4.1ļæ½ļæ½ļæ½ Water
UntitledSubclause2 – 4.2ļæ½ļæ½ļæ½ Methanol
UntitledSubclause2 – 4.3ļæ½ļæ½ļæ½ Mobile phase
UntitledSubclause2 – 4.4ļæ½ļæ½ļæ½ Ethanol/water mixture
8 UntitledSubclause2 – 4.5ļæ½ļæ½ļæ½ Magnesium oxide
UntitledSubclause2 – 4.6ļæ½ļæ½ļæ½ Caffeine stock standard solution
UntitledSubclause2 – 4.7ļæ½ļæ½ļæ½ Caffeine standard solutions
UntitledSubclause3 – 4.7.1ļæ½ļæ½ļæ½ Caffeine standard solutionļæ½A
UntitledSubclause3 – 4.7.2ļæ½ļæ½ļæ½ Caffeine standard solutionļæ½B
UntitledSubclause3 – 4.7.3ļæ½ļæ½ļæ½ Caffeine standard solutionļæ½C
UntitledSubclause3 – 4.7.4ļæ½ļæ½ļæ½ Caffeine standard solutionļæ½D
Clause1 – 5ļæ½ļæ½ļæ½ Apparatus
UntitledSubclause2 – 5.1ļæ½ļæ½ļæ½ High-performance liquid chromatograph
UntitledSubclause2 – 5.2ļæ½ļæ½ļæ½ Chromatographic column for HPLC
9 UntitledSubclause2 – 5.3ļæ½ļæ½ļæ½ Filter
UntitledSubclause2 – 5.4ļæ½ļæ½ļæ½ Electric heating mantle
UntitledSubclause2 – 5.5ļæ½ļæ½ļæ½ Flask
UntitledSubclause2 – 5.6ļæ½ļæ½ļæ½ Anti-bumping granules
UntitledSubclause2 – 5.7ļæ½ļæ½ļæ½ Condenser
UntitledSubclause2 – 5.8ļæ½ļæ½ļæ½ Analytical balance
Clause1 – 6ļæ½ļæ½ļæ½ Sampling
Clause1 – 7ļæ½ļæ½ļæ½ Preparation of test sample
Clause1 – 8ļæ½ļæ½ļæ½ Procedure
Subclause2 – 8.1ļæ½ļæ½ļæ½ General
Subclause2 – 8.2ļæ½ļæ½ļæ½ Determination of dry matter content
10 Subclause2 – 8.3ļæ½ļæ½ļæ½ Test portion
Subclause3 – 8.3.1ļæ½ļæ½ļæ½ Green tea and black tea
Subclause3 – 8.3.2ļæ½ļæ½ļæ½ Instant tea
Subclause2 – 8.4ļæ½ļæ½ļæ½ Extraction of caffeine
UntitledSubclause3 – 8.4.1ļæ½ļæ½ļæ½ Add, to the tea in the flask,
UntitledSubclause3 – 8.4.2ļæ½ļæ½ļæ½ Mix the contents. Attach the condenser (
UntitledSubclause3 – 8.4.3ļæ½ļæ½ļæ½ Remove the flask and contents from the heating mantle and cool to r…
UntitledSubclause3 – 8.4.4ļæ½ļæ½ļæ½ Leave the flask to stand to allow the contents to settle, then remo…
Subclause2 – 8.5ļæ½ļæ½ļæ½ Dilution
Subclause2 – 8.6ļæ½ļæ½ļæ½ Determination
Subclause3 – 8.6.1ļæ½ļæ½ļæ½ Adjustment of the apparatus
Subclause3 – 8.6.2ļæ½ļæ½ļæ½ HPLC analysis
11 Clause1 – 9ļæ½ļæ½ļæ½ Calculation
Clause1 – 10ļæ½ļæ½ļæ½ Precision
Subclause2 – 10.1ļæ½ļæ½ļæ½ Interlaboratory test
12 Subclause2 – 10.2ļæ½ļæ½ļæ½ Repeatability
Subclause2 – 10.3ļæ½ļæ½ļæ½ Reproducibility
Clause1 – 11ļæ½ļæ½ļæ½ Test report
13 AnnexInformative – Results of interlaboratory test
14 Bibliography – Bibliography

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BS ISO 10727:2002
$102.76