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Guidance on how to prepare Benedict’s qualitative solution. This is used to qualitatively test for reducing sugars e.g. glucose, via a colour change.
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Guidance on how to prepare and use of DNSA (or DNS) reagent for reducing sugars. The reagent may be used qualitatively or quantitatively (colorimetric method).
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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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Provides detailed instructions for a simple practical which illustrates some of the working of the gut. Uses sucrose as the starting substrate and DNS reagent or glucose testing strips to identify the.. more
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This protocol explores the effects of different carbohydrase enzymes on a range of carbohydrates of varying molecular size by measuring the resulting concentrations of reducing sugars using a colorime.. more
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Health and safety advice for practical food testing, mainly proteins,
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This document explains how to carry out a circus of qualitative food tests for:carbohydratesstarch – iodine testreducing sugars - Benedict’s testnon-reducing sugars – hydrolysis then Benedict’s test p.. more
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Although both aldehydes and ketones contain the carbonyl functional group (-C=O), only aldehydes (or reducing sugars) give a positive ‘silver mirror’ test result with Tollen’s reagent. This small-scal.. more
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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.
words matched: glucose, test

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This provides an opportunity to develop and practice colorimetric techniques, and to plot a calibration curve. 
words matched: glucose, test

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