2.1.4.6: Agar Cubes (Preparation)

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    From LibreTexts, under CC BY-NC-SA 4.0, as the source states it; its equations are written in TeX, which the PDF shows typeset. This page at LibreTexts.

    Procedures

    1. Prepare a 2% solution of agar.
      • Mix 20 g of agar with 1 L of distilled water.
    2. Heat almost to a boil. Stir frequently until the solution is clear.
    3. Remove from heat and add 10 mL of 1% phenolphthalein solution.
      • 1 g phenolphthalein in 100 mL 95% ethanol (If pink, titrate with HCl until clear.)
    4. Pour agar into a shallow tray to a depth of 3 cm and allow it to set (overnight).

    Silicone Ice-cube trays can be used. It is difficult to find them in the appropriate metric measurements. 3 cm cubes are approximately 1.2 inches and there are molds for this.

    This page titled 2.1.4.6: Agar Cubes (Preparation) was last modified on Mon, 28 Aug 2023 17:38:55 GMT and is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by Shannon Clark.