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Basic recipe for making agar, with additional details for making a range of agars used in science practicals, but not including those used in microbiology. (See GL229 for those.)
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Risk assessment guidance for carbohydrates including various sugars, cellulose and dextrin.
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Risk assessment guidance for phosphoric(V) acid, potassium phosphate(V) and sodium phosphate(V).
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The additional negative ions test tube reactions for nitrate(III), nitrate(V), sulfate(IV), phosphate and carboxylates (methanoate and ethanoate).
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Guidance on the preparation of Benedict’s qualitative solution. This is used to qualitatively test for reducing sugars e.g. glucose, via a colour change
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How to prepare 0.2 M solutions of potassium/sodium phosphates and hydrogenphosphates (used to make buffer solutions).
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Guidance on the preparation of reagents used to test for the presence of anions. This Recipe only includes those reagents that are not covered by other Recipe Sheets.
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Describes the advantages and disadvantages of various Visking tubing practical activities intended to illustrate the workings of the gut. Suggests a range of solutions to problems identified.
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Describes an alternative, yet simple, GCSE practical activity which models enzymes working in the gut, using milk and lactase. Uses commonly-available glucose testing strips to determine the course of.. more
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This provides an opportunity to develop and practice colorimetric techniques, and to plot a calibration curve. 
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Showing results 1 to 10 of 61
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