蛋白质是人体营养的重要成分之一,认识蛋白质组成的化学元素,是高中化学教学所规定的内容和应达到的要求。一、实验原理蛋白质主要由20种氨基酸组成,每种氨基酸均含有C,H,O,N4种元素。其中胱氨酸、半胱氨酸、蛋氨酸还含有S元素。因此蛋白质的组成除以上4种元素外,多数蛋白质还含有S元素。将蛋白质隔绝空 Protein is one of the important components of human nutrition. Understanding the chemical elements of protein composition is the content stipulated by high school chemistry teaching and the requirements that should be met. First, the experimental principle The protein consists of 20 kinds of amino acids, each containing C, H, O, N four kinds of elements. Among them, cystine, cysteine ​​and methionine also contain S element. Therefore, the composition of the protein in addition to the above four elements, most of the protein also contains S elements. Isolate the protein from empty