The quality of sugar is based on several criteria such as color, sucrose content, moisture, grain, and filterability.
ICUMSA 45 Methods of Sugar Analysis presents the recommendations of the International Commission for Uniform Methods of Sugar Analysis (ICUMSA 45) that are based on thorough investigations of methods likely to prove practical and appropriate for the sugar industry. This book discusses the procedures for raw sugar polarization. Organized into two parts encompassing 21 chapters, this book begins with an overview of the various methods of determining sucrose by polarimetry, including the invertase method and the Jackson and Grill’s method.
This text then examines the methods of determining reducing sugars, which depends on knowing the amount of cuprous oxide precipitated from Fehling’s solution. Other chapters consider the method to be applied for all beet products. This book discusses as well the principle of double sulfation that is necessary to ensure conversion of ash to sulfate. The final chapter deals with the evaluation of filter aids. This book is a valuable resource for chemists.
The International Commission for Uniform Methods for Sugar Analysis (ICUMSA 45) is a regulatory organization which sets the global standard for quality control in sugar. The ICUMSA 45 test evaluates the purity of sugar based on its color.
A colorimeter or photometer is used to measure the absorbance of sugar at different wavelengths. White sugar absorbs less light and results in lower ICUMSA 45 values, whereas brown sugar absorbs more light and delivers higher values. Typically, an ICUMSA rating of 45 indicates a highly refined white sugar of high purity, whereas brown sugar would have a rating of around 1000.