Gerhardt Laboratory Equipment for almost every industry across the world

The Relationship Between Gerhardt & Xylem Lab Solutions

C. Gerhardt is one of the leading global suppliers of laboratory equipment and analytical systems for food, animal feed, and environmental testing. They supply a variety of industry sectors that require accuracy, reliability, flexibility, and continuous attention to service which are essential to their business operations. That is what C. Gerhardt has stood for since 1846.

The laboratory brands of Xylem have a renowned history of innovation which includes the introduction of the world’s first portable refractometer (1935), the invention of the glass electrode in 1936, the first commercial heart-lung machine (1956), the introduction of PC-controlled titration (1988), and the development of a Total Organic Carbon Analyzer for the International Space Station (2008). These instruments and many more were developed with a focus on providing solutions that would not only benefit our customers but our communities, as well.

With these innovations, we support a variety of industries that include food & beverage, environmental laboratories, petroleum, specialty chemicals, and more.

Xylem Lab Solutions strives to provide our customers with state-of-the-art instruments through means of our own brands and through strategic partnerships, like the one with have with C.Gerhardt Analytical Systems.

Our Portfolio

Nitrogen & Protein Determination

Nearly all food, for animals and humans alike, contains nitrogen/protein. The amount of protein in a sample is determined from the percentage of nitrogen in the sample, which is a key parameter to conclude the quality and price of a specific product. Protein and nitrogen analysis is vital to these respective industries. Regulations by the FDA require the protein content to be declared on labels for both human and animal products.

There are two methods offered by C. Gerhardt to measure protein and nitrogen in food and animal feed. One is the method of Johan Kjeldahl, which to date is the standard in the industry. This method is adaptable for a variety of applications in food, feed, soil, and water analysis. Furthermore, this method is highly precise and is the only option for some inhomogeneous samples that are high in weight. C.Gerhardt offers the Classic Digestion Apparatus for manual Kjeldahl digestion process as well as the automated systems with KJELDATHERM block digestion system or the VAPODEST distillation system.

The other is the method of Jean Dumas which is a combustion analysis method where the sample is oxidized in a controlled manner and the subsequent gaseous samples are further analyzed. This is done by C. Gerhardts’ DUMATHERM combustion analyzer and reduces the analysis time from hours to 3 minutes or less.

Total Fat Determination

There are five key factors in evaluating food quality which include water, protein, fiber, sodium content, and total fat content. Fat content is also important when evaluating animal feed and is measured as crude fat using the Weende analysis. Like with protein analysis, this parameter is used to decide the quality and price of the product. The processing industry monitors the fat content in raw materials and finished products as part of quality control. In the environmental sector, the fat content in water and sewage is measured to evaluate the body of water.

All fat analysis is done employing an extraction but some samples, like in the animal feed industry, need a pre-digestion with acid. This method is known as the Weibull-Stoldt/Weibull-Berntrop method, where the sample is digested with hydrochloric acid under heat before filtration and extraction with petrol ether. The sample is then dried, weighed and the fat content is calculated by taking the initial sample weight and subtracting the output weight. C. Gerhardt’s HYDROTHERM automatic acid hydrolysis instrument was specially designed to fully automate this complex and hazardous method.

If the sample is more common and only requires solid/liquid extraction with a lipophilic solvent, the Soxhlet method can be utilized. The classic Soxhlet method is the manual extraction procedure that is laborious and requires several hours to complete. The C. Gerhardt’s SOXTHERM offers rapid extraction through its automated system for up to 24 samples simultaneously.

Plant Fiber Analysis

Animal feed is particularly reliant on optimal fiber content. Fiber content is crucial to animal feed because of its’ influence on the quality of the product and animal health.

Fiber content determination is particularly important for animal feed.

The proportion of vegetable fibers has a significant influence on the usability of the feed and on animal health. The method used to determine vegetable fiber replicates the digestive process in an animal’s stomach. This enables the assessment of the quality of the product based on qualitatively and quantitatively differences in fiber fractions that have been determined.

C. Gerhardt offers customers an innovative and automated filtration method to determine any fiber fraction of interest which includes crude fiber, ADF, NDF, and ADL fractions in feedstuff. The FIBERTHERM utilizes FiberBag-Technology developed by C. Gerhardt, which avoids the common problems in classic filtration like using frits and filter beds. With FIBERTHERM’S automated process sample handling and digestion are streamlined to ensure accurate and reliable results. The FiberBag method utilizes a large filter bag made of a high-precision specialty textile that ensures standardized filtration conditions where both the digestion and filtrations are done.

Steam Distillation

Distillation is one of the classic methods of substance separation. This method has seen advancements in subsequent methods, like steam distillation, which provides improved accuracy and reproducibility for the same variety of samples. The ability of these substances to be separated utilizing steam is capitalized by numerous industries to determine quality and quantity to the substances of interest.

Steam distillation is widely used in a variety of industries including, food, beverage, environmental, specialty chemicals, and more. This method is used to identify several different components in samples like nitrogen, sulfur dioxide, volatile acids, vicinal diketones, ammonium, cyanide, and formaldehyde to name a few. Some of these compounds are even regulated by governing bodies like the US Food and Drug Administration and Environmental Protection Agency.

Each of these industries must monitor at least one or several of these parameters which can be accomplished with steam distillation.

C. Gerhardt’s VAPODEST distillation system provides users with a safer and automated way of doing steam distillation compared to classic manual methods. The VAPODEST ® is the highest protection for the user and the surrounding work environment. The VAPODEST was designed with longevity in mind, combined with low operating costs, which will save you money.