Food Surveillance Information Sheet Number 103
TABLE 2a: Concentrations of caffeine, theobromine and theophylline in tea
products. |
Product type
|
Number of samples |
Caffeine (mg/l)
|
Theobromine (mg/l)
|
Theophylline (mg/l)
|
|
|
Mean
|
Median
|
Range
|
Mean
|
Median
|
Range
|
Mean
|
Median
|
Range
|
|
Bags
|
14
|
326
|
325
|
245-430 (14)a
|
22
|
21
|
10-31 (14)a
|
1.2
|
1.5
|
ND-2.0 (12)a
|
|
Loose
|
3
|
102
|
105
|
95-105 (3)a
|
6.7
|
7.0
|
6.0-7.0 (3)a
|
0.4
|
0.5
|
0.3-0.5 (3)a
|
|
Decaffeinated/ low caffeine bags
|
3
|
50
|
20
|
5.0-125 (3)a
|
18.8
|
15.0
|
15.0-26.5 (3)a
|
1.3
|
1.5
|
1.0-1.5 (3)a
|
|
Instant
|
3
|
585
|
565
|
560-630 (3)a
|
31
|
33
|
26-33 (3)a
|
2.8
|
2.5
|
2.5-3.5 (3)a
|
|
Miscellaneousb
|
3
|
96
|
80
|
20-189 (3)a
|
4.5
|
4.0
|
1.5-8.0 (3)a
|
0.3
|
0.2
|
ND-0.5 (2)a
|
Notes:
a Number of samples with
detectable concentrations.
b Included two
instant tea preparations and an iced tea drink. For details see
Annex A.
Tea infusions were prepared by a
standard method based on one tea bag or 1.6 g of loose tea/instant tea and 200
ml of boiling water.
ND: Not detected (limits of detection: caffeine, 0.2
mg/l; theobromine, 0.1 mg/l; theophylline, 0.1 mg/l)
Other tables of results
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These pages were last updated on 27 March 1997
