phytochemistry
Does anyone have a protocol for betalain quantification by spectroscopic method from amaranthus spp.?
The following article may help you.
Betalains in red and yellow varieties of the Andean tuber crop ulluco (Ullucus tuberosus)
J Svenson, BM Smallfield, NI Joyce… - Journal of agricultural …, 2008 - ACS Publications
... The extensive research by the Stintzing and Corke groups have revealed the betalain composition
of a ... purple pitaya, and cactus pear, and the list of identified betalains has reached ... Betaxanthins
and betacyanins were monitored and quantified at 470 and 538 nm, respectively. ...
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