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有机物的测定用间接原子吸收法测定有机物也是一种灵敏和有效的方法,分析的直接对象仍然是金属元素。除了一些本来含有易测的金属元素的有机样品可直接测定外,对大多数不含金属元素的有机样品来说,就需要通过必要的化学反应或利用其化学反应的产物,使其形成金属络合物、螯合物、离子缔合物,然后用原子吸收法加以测定。醇用原子吸收法间接测定甲醇、乙醇、正丙醇、正丁醇、异丁醇、异戊醇、乙二醇、丙三醇等十三种醇类的结果表明,灵敏度比比色法高两个数量级以上。方法是在醋酸介质中,醇类与铬酸、吡啶形成络合物,该络合物在氨碱性条件下可溶于苯,分去水相后苯层中加入
Determination of organic matter Determination of organic substances by indirect atomic absorption method is also a sensitive and effective method, the direct object of analysis is still a metal element. Except that some organic samples that originally contain easily detectable metal elements are directly determinable, for most metal-free organic samples, the metal network needs to be formed by the necessary chemical reaction or by using the product of its chemical reaction Chelates, ionic complexes, and then determined by atomic absorption spectroscopy. Indirect determination of thirteen alcohols such as methanol, ethanol, n-propanol, n-butanol, isobutanol, isoamyl alcohol, ethylene glycol and glycerol by the method of atomic absorption showed that the sensitivity was higher than the colorimetric method An order of magnitude above. Method is in acetic acid medium, alcohol and chromic acid, pyridine form a complex, the complex is soluble in benzene under ammonia alkaline conditions, after the water phase to the benzene layer was added