海底X射线荧光探测技术及其应用研究

THE APPLICATION OF IN-SITU X-RAY FLUORESCENCE TECHNIQUE TO DETERMINING ELEMENT CONCENTRATIONS OF SEABED SEDIMENTS

介绍一种新的海底X射线荧光探测系统 ,提出了天然沉积物水份对现场X射线荧光测量影响的散射校正模型。经水底砂介质模型和船上天然海底沉积物的试验表明 ,该探测系统在无液氮冷却条件下能够实现对水底沉积物的原位测量 ,且一次可同时完成 5～ 10余种元素的定性、定量测定 ,其检出限可达 (10～ 2 0 0 )× 10 -6,这是一种快速、经济。

This paper describes s a new X ray fluorescence technique for in situ determining concentrations of various elements in seabed sediments and, based on scattered radiation, advances a method for correcting the influence of water content of natural seabed sediments upon the results of X ray fluorescence analysis. Tests show that this technique can perform the underwater analytical tasks at a depth of less than 1000 meters and simultaneously determine more than 10 elements at the detection limit of (10～200)×10 -6 without liquid nitrogen supply. The in situ X ray fluorescence technique proves to be a rapid, economical and effective analytical method.