1、硫在自然界的普遍存在性,以及工农业生产、科研工作中对于硫的测定的重要: 在古埃及的时候,人们已认识了硫。在炼金术士的理论概念中,认为“硫”是自然界的“基本要素”之一,是可燃性最完善的代表。硫在地壳中的含量为0.03％,因此是一个分布很广的元素,除自由硫外,硫大量以硫化物、硫酸盐的矿物存在(如FeS_2,CaSO_4等)。火山喷射的气体和某些矿泉水中,硫 1, The ubiquity of sulfur in nature, as well as the determination of sulfur in industrial and agricultural production and scientific research: In ancient Egypt, sulfur was known. Among the alchemist theoretical concepts, “sulfur” is considered as one of the “basic elements” of nature and the most flammable representative. Sulfur is present in the earth’s crust at 0.03% and is therefore a widely distributed element. Except for free sulfur, sulfur is present as sulfide and sulfate minerals (eg FeS 2, CaSO 4, etc.). Volcanic gas and some mineral water, sulfur