Food analysis
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Food analysis Quality control in the food and beverage industry

Metrohm ... • is the global market leader in titration • is the only company to offer a complete range of ion analysis equipment – titration, voltammetry, and ion chromatography • is a Swiss company and manufactures exclusively in Switzerland • grants a 3-year instrument warranty and a 10-year warranty on chemical suppressors for ion chromatography • provides you with unparalleled application expertise • offers you more than 1300 applications free of charge • supports you with expert service through local representatives and regional support centers • is not listed on the stock exchange,...

Metrohm – customized analysis for the food and beverage industry The law sets high standards The food industry is subject to particularly strict regulations on the quality and safety of its products. This is not without reason: If contaminated food reaches the retail market, the consequences can be serious – and not just for the consumers. Regulatory compliance In order to guarantee the industry’s strict quality and safety standards, reliable instruments and methods are needed in the laboratory. These instruments and methods must meet highest standards. Regulatory compliance is the...

The following table is organized according to product areas and lists relevant parameters that can be determined using methods developed by Metrohm. Moreover, you can see which standards these methods fulfill. If you cannot find your sample matrix or a parameter that is important for you, please contact your local Metrohm representative. We are continuously expanding our range of applications and will gladly assist you in solving your specific analytical problem.

pH measurement pH measurement is one of the most important parameters in the quality control of foodstuffs. pH provides information on the quality of natural products such as citrus fruits, juices or dairy products for example. Furthermore, pH is an important parameter in the use of acidity regulators as preservatives. The requirements of the pH electrode that is used for measurement are just as varied as the many foods to be analyzed. The selection of a diaphragm that is appropriate for the sample is especially important since otherwise the electrolyte bridge can quickly become blocked by...

Rugged, reliable, and easy to use: pH meters from Metrohm pH determinations with the 826 pH mobile and 827 pH lab meters Whether you are performing routine pH determinations in the laboratory or out in the field – with Metrohm pH meters you never have to do without GLP: three-point calibration, automatic buffer recognition, temperature compensation, sample identification, GLP-compliant printout, and a large memory for storing measurement results – pH meters from Metrohm offer all of these features at a very attractive price. pH, chloride, fluoride, and ammonium determinations with the 780...

Benefit from the know-how of the market leader Metrohm is the leading manufacturer in the field of titration. Sixty years of experience and the most comprehensive and innovative program on the market are proof of our strength. Our collection of potentiometric applications that is available to you is huge. Benefit from more than 150 proven titration applications from the food industry sector that we have prepared based on the following publications: • Deutsche Einheitsverfahren zur Wasser-, Abwasser und Schlammuntersuchung (German Standard Methods for the Examination of Water,...

Titration with Metrohm: Solutions for every need and budget With the Food/Beverage Titrino plus, the Food/Beverage Compact Titrosampler, and the Food Titrando, Metrohm offers you three complete titration packages. No matter which package you choose, simple and reliable work is guaranteed: Food/Beverage Titrino plus – the economically priced titrator for routine analysis in the food laboratory. This all-inclusive package also comprises an USB stick with 100 methods stored for the most important applications in food analysis. • intelligent exchange or dosing units ensure the use of the...

Thermometric titration: the ideal complement to potentiometric titration 10 Thermometric titration is a highly versatile determination method and is the ideal complement to potentiometric titration. In principle, the method is suitable for every reaction that creates a sufficiently large temperature change in the sample solution. This method is particularly suitable in applications for which: This principle is the basis of thermometric titration. In a thermometric titration, reagent solution (titrant) is continually added until the endpoint is reached. The endpoint is seen as a break in the...

Application examples Unsaturated fatty acids in edible oil Determination of the content of unsaturated fatty acids in edible oil is based on the titration of weak acids in nonaqueous solutions with a dilute solution of a strong base in alcohol. Problems that occur when performing potentiometric titrations on samples with low free fatty acid contents can be avoided with thermometric titrations. Thermometric titration is simple and employs a catalyzed indicator reaction. Determination of sodium content in food The sodium content of foods is usually determined indirectly through a...

Karl Fischer titration 12 Determination of water content in food, beverages, tobacco, and pet food The water content largely determines the quality and shelf life of many food products. The amount of water in food can be easily determined by means of Karl Fischer titration. Water exists in food in different forms. They range from clearly defined forms (for example, as in sucrose and alcoholic beverages) to those in complex cellular structures (for example, as in dry fruits) in which the water is bound to the surface as well as between particles. Moreover, water can also be trapped within...

Application examples The following table shows by which technique various foodstuffs can be analyzed. Detailed information and titration procedures can be found in the free Metrohm monograph «Water Determination by Karl Fischer Titration». Samples Type of Titration Non-alcoholic beverages Fruit juices, vegetable juices, syrups, soft drinks vol. Frying fat, deep-frying, olive, peanut, sunflower canola, and Fats and oils coul. safflower oils (AOAC 984.20, ISO 8534) Dairy products, protein- Butter, milk, cream, yoghurt, cream cheese, curd cheese, cheese, containing products, milk powder,...