DIY Science: Illustrated Guide to Home Biology Experiments: All Lab, No Lecture by Robert Bruce Thompson & Barbara Fritchman Thompson

Author:Robert Bruce Thompson & Barbara Fritchman Thompson [Robert Bruce Thompson]
Language: eng
Format: epub
Tags: SCIENCE / Life Sciences / Biology
ISBN: 9781449302610
Publisher: Make
Published: 2012-04-16T16:00:00+00:00

Cut one chromatography strip about 2.5 x 9 cm for each of your extract solutions. About 1 cm from one end of each strip, draw a light pencil line across the width of the strip. At the far end of the strip, label it, e.g., “extract A.”

Spot each strip with the corresponding extract. To do so, place the strip on a clean flat surface. Dip the tip of a clean plastic toothpick into the extract solution and transfer the tiny drop on the tip of the toothpick to the center of the pencil line, ideally with the pencil line bisecting the spot. The goal is to make the smallest possible spot on the paper. Allow the spot to dry.

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