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雅婷 asked in 社會與文化語言 · 1 decade ago


1. The depectinized juice was then clarified with 6 ml of 5% bentonite and 5 ml

of 15% kizelsol at 50℃ for 30 min.

2.For this purpose, aliquots of fruit juice matrices containing black carrot

concentrate were brought to pH 1.0 and 4.5 and allowed to equilibriate for 1 h.

3.The absorbance of each equilibrated solution was then measured at the

wavelength of maximum absorption (kmax) and 700 nm for haze correction,

using a ThermoSpectronic Helios-a model spectrophotometer .

4.The difference in absorbance values at pH 1.0 and 4.5 was directly

proportional to total anthocyanin concentration which was calculated, based

on cyanidin-3-glucoside with a molecular weight of 445.2 and molar

absorbance of 29,600.

1 Answer

  • 1 decade ago
    Favorite Answer

    1 3 2 4


    For this purpose

    The absorbance...was then

    The pH 1.0 and 4.5



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