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花青素遇酸性、中性和碱性会呈現各种不同的顏色。我們利用花青素的这种特点,可以制成指示剂,用来测定土壤的酸碱度。如何制取指示剂呢? 取野牡丹花辦,用水煮开后过滤就制成一种灵敏的指示剂。它在不同的酸碱
Anthocyanins appear in a variety of colors when they are acidic, neutral and alkaline. We use this feature of anthocyanins to make indicators that can be used to determine the pH of the soil. How to make the indicator? Take wild peony flowers, boiled open and filtered to make a sensitive indicator. It’s in different acids and bases