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TableĀ 2 HPLC gradients

From: Colouring of Pacific barkcloths: identification of the brown, red and yellow colourants used in the decoration of historic Pacific barkcloths

Time (min) Water (%) Acetonitrile (%) 5% H3PO4 (%)
HPLC gradient 1
0 68 30 2
25 0 98 2
30 0 98 2
30.1 68 98 2
35 68 98 2
HPLC gradient 2
0 85 10 5
25 0 95 5
25.1 85 10 5
30 85 10 5