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Methods in Food Analysis
Applied to Plant Products
1st Edition - January 1, 1950
Author: Maynard Joslyn
9 7 8 - 0 - 3 2 3 - 1 4 6 8 1 - 4
Methods in Food Analysis Applied to Food Products deals with the principles and the acquired tools of food analysis, emphasizing fruit and vegetable products. The book explains… Read more
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Methods in Food Analysis Applied to Food Products deals with the principles and the acquired tools of food analysis, emphasizing fruit and vegetable products. The book explains the suitability and limitations of the analytical procedures used for food products, from polarimetry and saccharimetry to colorimetry, spectrophotometry, viscosimetry, acidimetry, and alcoholometry. This volume is organized into 20 chapters and begins with an overview of sampling and preparation and preservation of sample. Under the physical methods, the principles of the more common procedures are discussed together with their application to the analysis of fruit and vegetable products. A brief account of the nature of the products is included. In presenting the chemical methods, the salient chemical properties of the constituent are first considered, focusing on those properties used in analysis, which is then followed by an outline of the chemistry of several of the available methods. Finally a detailed description of one of the methods, usually as applied to fruit and vegetable products, is explained. Some references to microanalytical, bioassay and bacteriological procedures are made. This book is intended for food technologists, chemists, and manufacturers; students; and researchers involved in quantitative analyses; organic and inorganic chemistry; and bacteriology.
I. Introduction Outline of Contents Sources of Information ReferencesII. Statistical Analysis, Errors, Expression of Results Statistical Analysis Errors Expression of Results ReferencesIII. Sampling: Preparation of Samples for Analysis, Preservation of Sample Sampling Preparation of Sample Preservation of Samples ReferencesIV. Moisture Content and Total Solids Properties of Water Drying Methods Vacuum-Oven Method Other Drying Procedures Distillation Procedures Electrical Methods Other Physical Methods Chemical Methods ReferencesV. Ash Content and Ashing Procedures Total Ash Soluble and Insoluble Ash Alkalinity of Ash Conductometric Methods for Ash in Sugar Products Special Dry Ashing Procedures Ashing in Closed System in Presence of Oxygen Wet Ashing ReferencesVI. Extraction Methods and Separation Processes Proximate Chemical Analysis Extraction Methods Crude Fat or Ether Extract Liquid-Liquid Extraction Water-Insoluble Solids and Water-Soluble Solids Crude Fiber Alcohol-Insoluble Solids Alcohol Precipitate Clarification of Sugar Extracts ReferencesVII. Densimetric Methods Measurement of Specific Gravity of Liquids Measurement of Specific Gravity of Solids Specific Gravity of Tomato Pulp Specific Gravity of Oils Specific Gravity of Sugar Products The Grade of Canned Fruit Rapid Determination of Total Fat ReferencesVIII. Refractometric Methods Refractive Index Refractive Constants Applications of Refractive Index Measurements Refractometers Abbé Refractometer Soluble Solids in Fruit Products Total Solids in Tomato Pulp from Index of Refraction of Filtrate Refractive Index of Oils and Fats Oil Content ReferencesIX. Polarimetry and Saccharimetry Specific Rotation Mutarotation Polarimetry Saccharimeters ReferencesX. Colorimetry and Spectrophotometry Absorption of Light Emission of Light Color Measurement: Colorimetry Photoelectric Colorimetry Spectrophotometry Turbidimetry Artificial Coloring Matter ReferencesXI. Potentiometric and Related Methods Principles of Design and Use of Potentiometers Oxidation-Reduction Potentials Potentiometric Titrations Polarographic Methods Thermometry and Pyrometry ReferencesXII. pH and Buffer Capacity Definition of pH Buffers and Buffer Capacity Application of pH and Buffer Capacity in Food Technology Colorimetric Measurement of pH Electrometric Determination of pH ReferencesXIII. Viscosimetric and Other Physical Methods Viscosimetry Plasticity and Plastometers Gelometers Tenderometers Conductivity Measurements and Conductometric Analysis Gas Analysis ReferencesXIV. Acidimetry Organic Acids of Fruits and Vegetables and Other Foods Total Organic Acids Volatile Acids Separation and Determination of Acids Formic Acid Lactic Acid Tartaric Acid ReferencesXV. Alcoholometry Ethyl Alcohol Volumetric Dichromate Procedure Physical Methods Methyl Alcohol Glycerin ReferencesXVI. Carbohydrates: Reducing Sugars Occurrence Chemical Methods for Reducing Sugars Copper Reduction Procedures Ferricyanide Reduction Methods Direct Iodometric Methods Identification and Determination of Sugars by Microorganisms ReferencesXVII. Carbohydrates: Sucrose and Starch Sucrose Starch ReferencesXVIII. Pectins and Pentosans General Methods of Determining Pectin Content Pentosans ReferencesXIX. Tannins Methods Available for Analysis of Tannins Loewenthal Titration Colorimetric Procedure Cinchonine Tannate Procedure ReferencesXX. Organic Nitrogenous Compounds Total Organic Nitrogen Nitrogen Fractionation ReferencesIndex