Applications in Saudi Arabia

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    Hydroponics

    `A technique of growing plants in nutrient solution”. Hydroponics literally means water-working or water-activation. It is a cultivation technique for growing plants in highly oxygenated, nutrient enriched water, rather than soil. The nutrient solution and its management are the cornerstone for a successful hydroponics system. The function of a hydroponics nutrient solution is to supply the plant roots with water, oxygen and essential mineral elements in soluble form. In soil, biological decomposition breaks down organic matter into basic nutrients that plants feed on. Water dissolves these nutrients which allows uptake by the roots. For a plant to receive a well balanced diet, everything in the soil must be in perfect balance.

    By Myron L Company Distributor in SAUDI ARABIA.

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    Rapid Determination of Pesticides in Spinach

    Highly pigmented foods, such as spinach, require cleanup prior to analysis for pesticide residues. A dual-layer SPE tube containing graphitized carbon and aminopropyl on silica (NH2) is often used because; Carbon removes pigments and sterols and NH2 removes fatty acids, polar pigments, organic acids, and sugars. Removing these matrix materials reduces interferences that can lead to ion suppression in LC-MS, inlet contamination in GC-MS, and column contamination for both techniques. Our Supel Sphere Carbon/NH2 SPE tube uses spherical materials for both the carbon and NH2 layers, providing fast, more consistent flows compared to tubes containing granular material. This allows gravity elution (instead of vacuum elution) to be applied to Supel Sphere tubes, resulting in more contact time between extracts and sorbents.

    By Sigma-Aldrich Co., LLC Office in Al-Khobar, SAUDI ARABIA.

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    Improved Recovery of the Fungicide Carbendazim

    Fungicide carbendazim can some times be used to combat mold on citrus fruits including oranges. Recently, low residue levels of the fungicide were reported to be present in the bulk orange juice import shipments to the USA. Because this compound can persist through processing steps and may be found in the final consumer product, many government agencies have established maximum residue limits (MRLs) to ensure the safety of their population. Presented here is a single method, involving fast and effective QuEChERS cleanup, suitable for various orange juice matrices. The choice of PSA/C18 sorbents reduced interferences, resulting in greater recoveries and less ion-suppression. Because the QuEChERS method is fast, it only adds a few minutes to the sample preparation procedure. Sample processing using QuEChERS with PSA/C18 allows analysts to accurately process various matrices in a single workflow, with very little additional sample preparation time.

    By Sigma-Aldrich Co., LLC Office in Al-Khobar, SAUDI ARABIA.

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    Reproducible Recoveries of Pesticides from Fruits and Vegetables

    A group of 30 compounds was selected, representing pesticides, acaricides, insecticides, and fungicides. These samples were analyzed using Supel™ QuE QuEChERS and an Ascentis® Express RP-Amide HPLC Column.

    By Sigma-Aldrich Co., LLC Office in Al-Khobar, SAUDI ARABIA.

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    Improved Resolution of Mycotoxins from Cereal

    Mycotoxins are a diverse group comprised of hundreds of secondary metabolic products of various fungal species. Several show marked toxicity in humans. Contamination of the food supply with mycotoxins is increasingly prevalent, and can occur during growth, harvest, transportation, processing or storage. Techniques to reduce mycotoxin concentration after contamination are expensive, unreliable and sometimes reversible. Therefore, the removal of contaminated products from the food chain is a primary means of eliminating human exposure. The sensitive and accurate detection of very low levels of these compounds is critical to efforts to identify contaminated products. LC-MS/MS is a popular analytical technique for this purpose. This application explores using Ascentis® Express RP-Amide and Ascentis Express F5 HPLC columns to perform this analysis.

    By Sigma-Aldrich Co., LLC Office in Al-Khobar, SAUDI ARABIA.

  • Humic Acids for Aquaculture

    At fish breeding humic acids are known for long as an integral part of natural waters for the bio-logical improvement of the water quality. For this purpose peat based products were often used to optimize the pH with the containing humic acids. Huminc acids based products on base of lignite like HuminFeed® in the field of aquacultures are an object for research for many years yet. Within the research acitivities regarding the use of HuminFeed in aquacultures and ornamental fish breeding the following positive effects amongst others could be observed by the Leibniz-Institute of Freshwater Ecology and Inland Fisheries in Berlin:

    By Humintech GmbH Distributor in SAUDI ARABIA.

  • Humic Acids for Animal Breeding

    Humic acidscan be successfully used as an additive in animal feed. Various research trials conducted worldwide have all showed positive results concerning the use of humic acids as an organic feed ingredient. Increases in liveweight of animals, improved growth rates, increased feed intakes and food conversion ratios and a stronger resistance against diseases are the common results of these trials. By improving immune function of animals, especially of young animals, humic acids also reduce the incidence of enteric disease and diarrhoea.

    By Humintech GmbH Distributor in SAUDI ARABIA.

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