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以ICP为代表的等离子体光源是60年代才发展起来的发射光谱分析的新光源。但是,常用于ICP光源的气体为氩气,不适于卤素等非金属元素的测定,且氩气用量大,耗电量也高,使用受到了一定限制。 MIP可以氩、氦或氮为工作气体在常压下工作。在以氦气工作时,能够激发包括卤素在内的所有元素。但是,由于放电是在谐振腔内的石英管中形成,功率又小,所以样品承受能力很小,不适于溶液样品的分析。
The plasma light source represented by ICP is a new light source for emission spectrum analysis developed in the 1960s. However, the gas commonly used in ICP light sources is argon gas, which is not suitable for the measurement of non-metal elements such as halogen. The use amount of argon gas is large, and the power consumption is also high, so the use is limited. MIP can argon, helium or nitrogen as the working gas at atmospheric pressure. When working with helium, it excites all elements including halogen. However, since the discharge is formed in a quartz tube in a resonant cavity and the power is small, the sample has little capacity and is not suitable for solution sample analysis.