全谱直读电感耦合等离子体发射光谱法测定煤质样品中各种形态硫

Determination of Different Chemical State of Sulfur in Coal Samples By InductivelyCoupled Plasma Optical Emission Spectrum

样品依次用稀盐酸浸取硫酸盐硫,稀硝酸浸取硫化铁硫,分别用热水洗至残渣中无铁离子,过滤定容后可直接上电感耦合等离子体发射光谱仪上测定。通过加标回收率的试验,发现方法适用于低、中含量各种形态硫的测定。可更好地代替传统方法中重量法对硫酸盐硫的测定,硫化铁硫的测定也更加简便快捷。

A method for determination of Different Chemical State of Sulfur in Coal Samples.After leaching sulfur in sulfate by dilute hydrochloric acid and sulfur in iron sulphide by dilute nitric acid successively,samples are kept rinsing with hot water until there aren’t iron ion in the residue,able to be directly detected on inductively coupled plasma emission spec⁃trometer after filtration and constant volume.Through the standard recovery rate test,it is found that this method applies to determination of various forms of sulfur in low and medium assay.It can better substitute the traditional gravimetric method in the determination of sulfur content in iron sulfide,which is simpler and more efficient.