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研制了一个电感耦合等离子体离子源封闭装置。装置由中空聚四氟乙烯挡板、聚四氟乙烯圆柱套、屏蔽罩外壳和中空紫铜块组成,挡板内钻孔,可通入气体在装置内形成两路旋流,紫铜块内上下挖孔,孔内可让冷却水流过。装置内通入氩气时,LA-ICP-MS制作紫铜中元素铁的校准曲线,56Fe的线性相关系数为0.9982;通入氦气时,LA-ICP-MS制作钢铁中元素硫的校准曲线,32S的线性相关系数为0.9910。该装置能在等离子体离子源周围形成填充气体的氛围,隔离空气,改变背景信号,改善ICP-MS的分析性能,是一种新的实验装置,具有实用性。
An inductively coupled plasma ion source sealing device was developed. The device consists of a hollow polytetrafluoroethylene baffle, a polytetrafluoroethylene cylindrical sleeve, a shielding shell and a hollow copper block. The baffle is internally drilled to allow gas to pass into the device to form two swirl streams. Hole, the hole allows cooling water to flow through. The calibration curve of elemental iron in copper was produced by LA-ICP-MS. The linear correlation coefficient of 56Fe was 0.9982. When the helium was introduced, the calibration curve of elemental sulfur in steel was produced by LA-ICP-MS. The linear correlation coefficient of 32S is 0.9910. The device is a new experimental device that can be used as a new experimental device by forming a gas-filled atmosphere around the plasma ion source, isolating the air, changing the background signal and improving the analytical performance of the ICP-MS.