Author/Authors :
shahin, mahmoud s.a. main chemical laboratories, armed forces, Egypt , saad, ebtissam a. ain shams university - faculty of science - chemistry department, Cairo, Egypt , shazly, ahmed main chemical laboratories, armed forces, Egypt , ezzat, amir ain shams university - faculty of science - chemistry department, Cairo, Egypt , el-mongy, sayed a. main chemical laboratories, armed forces, Egypt
Abstract :
In this work five different treatment approaches were carried out to improve extraction and recovery of uranium and thorium from black sand and sea water matrices to be analyzed by ultra-sensitive ICP-MS technique. Quality control using standard IAEA reference was performed. These radionuclides were accurately determined in µg/L levels. The isotopic ratios; ^235U/^238U, ^234U/238U, ^238U/totalU and total U/^232Th were also assayed precisely, calculated and correlated. The results show values very close to the natural origin signature. The accuracy of separation and measured U isotopes and 232Th are of great importance for the national analytical techniques program.
Keywords :
Separation approaches , Ultra , trace Analysis , ICP , MS , Th , U isotopic ratios
