Analysis of the contents of hydrogen and carbon in skarn minerals

CHNS元素分析仪通常用于分析有机物质的化学成分，我们尝试使用只需要少量样品的元素分析仪分析矿物中的碳、氢、氮和硫的含量。为了确定分析结果的精密度和仪器使用的有效方法，我们对有机和无机标准试剂进行了分析。随后，对矿物标准进行分析，以确定燃烧温度、与矿物中共存的其他元素的含量和影响有关的样品数量。在上述资料确定的适宜条件下，对矽卡岩矿物进行了分析。结果如下：1。对同一种矿物样品，用元素分析仪测得的氢和碳的含量与卡尔费希尔水分计测得的结果吻合得很好。用元素分析仪测得的矿物中水分含量与烧失量或热分析的结果接近，与理论值一致。由于元素分析仪测量所需的样品数量比湿化学分析所需的样品数量少，因此能够分析某些矿物质的含水量。EPMA和元素分析仪的使用确定了一些矿物的化学组成和化学式。当一种不含氢和/或碳的矿物与其他已知的含氢和/或碳的矿物混合时，混合物中氢和碳的含量决定了这种矿物的化学成分。

A CHNS elemental analyzer is usually used to analyze the chemical composition of organic materials, we attempted to analyze the contents of carbon, hydrogen, nitrogen and sulfur in minerals using an elemental analyzer which needs only small amounts of samples.To determine the precision of the analitical results and the effective method of the use of the instrument, we analyzed organic and inorganic standard reagents. Mineral standars, subsequently, were analyzed to determine the combustion temperatures, the amounts of samples relating to the contents and the influence of coexisting other elements in minerals. Skarn minerals were analyzed under the suitable conditions determined from the above data. The results are as follows.1.The contents of hydrogen and carbon measured by the use of an elemental analyzer agree well with those measured by a Karl-Fischer Moisture meter for the same mineral samples.2.The water contents in minerals measured by the use of an elemental analyzer are close to those determined from data of ignition loss or thermal analysis and are consistent with the theoretical values.3.Because the amounts of samples required for the measurment by an elemental analyzer are less than those by wet-chemical analyzes, the water contents of some minerals were able to be analyzed.4.The use of both EPMA and an elemental analyzer determined the chemical compositions and the chemical formurae of some minerals.5.When a mineral not contain hydrogen and/or carbon and is mixed with known other minerals containing hydrogen and/or carbon, the contents of hydrogen and carobon in the mixture give the chemical composition of the mineral.