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Foodlab
Heavy metals in wine - simple and easy

Heavy metals in wine – simple and easy

Wine sometimes contains heavy metals which can be precipitated out by the addition of potassium ferrocyanide. Generally, these are quantities of iron ranging between 1 and 5 mg, and exceptionally up to 9 mg Fe/L. Zinc, copper, and lead – in descending order of content – may also be present.
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Oxidation stability of fats and oils in solid foods using the Rancimat method

Oxidation stability of fats and oils in solid foods using the Rancimat method

The Metrohm oxidation stability of fats and oils is an important parameter for quality controls in the food industry. Ideally, the determination is made with the Rancimat method, which is suitable for both liquid and solid samples. Its determination takes place directly in the sample or, in cases where this...
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Analysis of food samples by means of ion chromatography

Analysis of food samples by means of ion chromatography

This Metrohm article describes the fully automated ion chromatography determination of chloride, phosphate and sulfate in an ultraheat-treated (UHT) milk sample and baby milk powder dissolved in water by means of the 881 Compact IC pro ion chromatograph and the upstream Metrohm dialysis cell. If a difficult food sample such...
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Titrimetric analysis of jams, fruit and vegetable juices and their concentrates

How to determine pH value, total titratable acid, ash alkalinity, formol number, total sulfurous acid, chloride, sulfate, calcium and magnesium with Metrohm instruments. This Metrohm Application Bulletin AB-085 describes analysis methods for determining the following parameters: pH value, total titratable acid, ash alkalinity, formol number, total sulfurous acid, chloride, sulfate,...
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Determination of sodium in instant noodles

Determination of sodium in instant noodles

This Metrohm Application Note H–123 describes the determination of the total sodium content in instant noodles which are also called «two minute noodles» in some countries. Worth its salt In the presence of an excess of potassium and fl uoride ions, sodium reacts exothermically with aluminum to produce NaK2AlF6 (elpasolite)....
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Electrochemistry in the quality control of food and beverage packaging

Electrochemistry in the quality control of food and beverage packaging

The shelf life of foods and beverages depends to a great extent on the packaging material. Metals are ideally suited for this purpose, as they can be coated with different passivating food-grade layers. Nethertheless, electrochemical measurements such as impedance spectroscopy (EIS) are required to monitor the integrity of the sealing...
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The determination of water content in margarine by Karl Fischer 899 Coulometer

The determination of water content in margarine by Karl Fischer 899 Coulometer

The water content of margarine is determined according to Karl Fischer. Metrohm 899 Coulometer with generator electrode without diaphragm Thanks to the integrated stirrer, the 899 Coulometer takes up less space on the laboratory table than a sheet of DIN A4 paper. Although small and compact, the coulometer does not...
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Fast IC: Drinking water analysis in three minutes

Fast IC: Drinking water analysis in three minutes

The wait is over - or at least much shorter! Metrohm is pleased to present a range of new Application Notes (ANs) for accelerated ion analysis. This is attained with short columns, relatively high flows and strong eluents. "Fast IC" means accelerating ion chromatography using columns with higher than the...
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Fishery & Aquaculture – reliable online, inline, and atline analysis systems for optimizing aquaculture plants

Fishery & Aquaculture – reliable online, inline, and atline analysis systems for optimizing aquaculture plants

Forecast: farmed fish to overtake wild caught by 2030 Fish is well-known as a healthy source of animal protein, high in unsaturated fats and other essential nutrients. In 2013, 17% of worldwide animal protein intake came from fish (UN, The State of World Fisheries and Aquaculture 2016). According to the...
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Water in flour (meal)

Water in flour (meal)

Pour 25 mL methanol into the titration vessel, heat the solution to 50 °C and condition it. Add ca. 0.3 g sample using a glass weighing spoon (the exact sample mass is determined by difference weighing) and start the automatic determination with an extraction time of 60 s.
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Special Promotion 2018: Upgrade your Metrohm pH/Conductivity Meter and save

We are now offering 3 amazing instrument packages with huge savings for a limited time to our select customers. Package 1: Metrohm 912 Conductivity Meter Promotion Package THB 55,000. valued at THB 89,100 SAVE THB 34,100 Package 2: Metrohm 913 pH Meter Promotion Package THB 55,000. valued at THB 82,250...
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Thermometry – the better method to determine total sodium in foodstuffs

Thermometric titration shares with potentiometric titration the use of a sensor to detect the endpoint of the titration reaction. In the case of thermometric titration, however, the sensor is a fast responding thermometer.  Hence, instead of measuring the electrochemical potential in the solution, this robust, highly sensitive thermometer tracks the...
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Analysis of food samples by means of ion chromatography

Analysis of food samples by means of ion chromatography

If a difficult food sample such as dairy products is run on an ion chromatograph (IC), there is a big chance that the column will be irretrievably wrecked. Of course, to avoid this a lot of time can be spent on tedious sample preparation steps to eliminate undesirable matrix components....
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Free and residual chlorine according to DIN EN ISO 7393-1

Free and residual chlorine according to DIN EN ISO 7393-1

To disinfect water for human consumption, chlorine is added to the water in some countries. Chlorine is highly toxic, organisms like bacteria are killed and the onset of waterborne diseases like cholera is prevented. Not only is chlorine toxic to microorganisms, it is toxic for humans as well. The main...
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Best before …

Best before …

Foodstuffs that contain fat – like butter, nuts, cookies, and potato chips – turn rancid over time. This is caused by chemical changes in the fat; in particular, its oxidation. Because of this, determining the oxidation stability of fats and oils in foods has proven to be a useful tool in the quality...
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New ASTM method simplifies determination of Kjeldahl nitrogen

New ASTM method simplifies determination of Kjeldahl nitrogen

Total Kjeldahl and total nitrogen are commonly determined by titration after distillation of the digestion mixture to release the ammonia. The new ASTM D8001 offers an alternative applying persulfate digestion followed by ion chromatographic separation and conductivity detection with sequential suppression. The new method is described by Metrohm Application Note...
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Food analysis: Peroxide number

The peroxide number gives information about the number of peroxide compounds in the oil and hence of the age and quality of the edible oil. The lower the peroxide numbers the better and/or newer the oil. The Food/Beverage Titrino plus offers you the complete package for all conventional analyses in...
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Attend our free webinars on IC and NIR

Inline Sample Preparation in IC Learn how inline sample preparation can help you to deal with matrix components that interfere with your ion chromatography analyses. In addition, inline sample preparation can make your analyses faster, more cost-effective, and more accurate. Metrohm presents a IC webinar hosted by G.I.T. Laboratory Journal...
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Metrohm acquires majority of DropSens

The Switzerland-based Metrohm AG is pleased to announce the acquisition of the majority of share in DropSens S.L. The acquisition comes after a longer period of successful cooperation between the two companies in the development of screen-printed electrodes and portable electrochemical instrumentation. With the acquisition of DropSens, Metrohm benefits from...
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CHOOSE THE INSTALLATION PACKAGE YOU NEED

Choose the installation package you need

Metrohm Installation Services ensure a proper installation and commissioning of your new instrument. This ensures that you can rely on the quality of your analytical results from day one. Metrohm Installation Services ensure a proper installation and commissioning of your new instrument in accordance with the supplier’s specifications by trained...
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