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Solid Fertilizers are substances containing the main chemical elements needed to improve the growth and productiveness of crops. It is therefore essential to determine the Nitrogen content of solid fertilizers. The Dumas method is one of the most common analyses to determine Nitrogen in fertilizers, following AOAC 993.13.

Urea is a crystalline substance widely used as a fertilizer, feed supplement, and starting material for plastics and drugs. It has a very high nitrogen content; it is readily converted to nitrate in the soil and is therefore considered one of the most concentrated nitrogenous fertilizers. The importance of having a controlled Nitrogen content in this product is crucial to always keep the same production standards.

TVBN (Total Volatile Basic Nitrogen) is a method of an alysis that quantifies the presence of nitrogenous compounds (ammonia and dimethyl and trimethyl amine) in fish from the sea or from river, revealing the degree of freshness. Learn how to obtain excellent performance with UDK 129 and how to work in accordance with Conway and Byrne method.

比较两种饼干的不同配方，目的是确定哪种饼干更耐氧化，因此保质期更长。 了解如何使用OXITEST获得出色的性能。

水是地球上最重要的资源，对人类和其他生物一样。尽管如此，世界上仍有近一半的人口无法获得可接受标准的饮用水。地下水通常是一个良好的饮用水来源，因为水是自然净化，当它缓慢地渗透到土壤。

大豆粉是用于饲养家畜的最重要的蛋白质来源。 它占世界蛋白质饲料总产量的三分之二。 了解如何使用NDA系列获得出色的性能以及如何按照AOAC进行工作。

Soybean meal is the most important protein source used to feed farm animals. It represents two-thirds of the total world output of protein feedstuffs. Learn how to obtain excellent performance with DK / DKL and UDK Series and how to work in accordance with AOAC.

Rice flour Certified Reference Material (CRM), traceable to NIST standard (SRM), is used to evaluate the reliability of the analytical method for the nitrogen and protein determination by using helium and argon as carrier gas with NDA 702, in accordance with AOAC.

食品最重要的质量变化之一是由于游离或酯化的不饱和脂肪酸吸收了氧气。 脂肪的自动氧化是光，高温，痕量金属元素以及有时酶引起的化学反应。 了解如何使用OXITEST获得出色的性能。

淀粉中的蛋白质含量是精制过程的重要参数，但从健康的角度出发，对于过敏和不耐受的人们也是如此。 了解如何使用NDA系列获得出色的性能以及如何按照AOAC进行工作。