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9982-1013460
3 B S c i e n t i f i c ® B i o l o g y
Exper iment s
Thin Layer Chromatog raphy
In many syllabuses, carrying out thin layer chromatography is explicitly re-
quired. The pupils not only use this test method in our experiment; they
also think about it and comment on it. Depending on how the lesson is
structured, the pupils can also consider possible errors using this experi-
ment, by discussing potential sources of error in planning and carrying out
the experiment (e.g. the lack of a control experiment). By making a com-
parison with the three glutamic acid standards, the tested samples can be
looked at from both a qualitative and a semi-quantitative perspective. In
the instructions, you will find both a thorough description of the test, and
interesting background information, as the experimentation kit has been
developed in collaboration with a food analysis laboratory.
Scope of delivery:
Extraction solution, L-Glutamic acid 50 mg, ninhydrin 300 mg, 20 pleated
filters, 50 disposable capillaries, 20 chromatography paper, 5 chromatogra-
phy chambers, test instructions with interesting background information.
Packaging size: Sufficient for 20 tests, with 5 groups working at the same
time.
&
D/E/S/F/I/P
9982-1013460
Brand new and
topical – versatile
in classroom
situations
On the Trail of Flavour Enhancers
An interesting experiment set that deals with a highly topical food issue, and at the
same time is based on an important chemical/biochemical method of separation (thin
layer chromatography – TLC).
Foods containing glutamates can be found in any super-
market, often hidden behind the labelling (yeast extract,
spices etc.). These include flavour enhancers in food-
stuffs, and their effect on people is a issue that is much
spoken about in the media. In biology class, this topic
can be easily incorporated into lessons on
metabolic
physiology, human health and diseases, nutrition and
proteins
.
