Method validation and uncertainty evaluation of organically bound tritium analysis in environmental sample.
The analytical method for organically bound tritium (OBT) was developed in our laboratory. The optimized operating conditions and parameters were established for sample drying, special combustion, distillation, and measurement on a liquid scintillation spectrometer (LSC). Selected types of OBT samples such as rice, corn, rapeseed, fresh lettuce and pork were analyzed for method validation of recovery rate reproducibility, the minimum detection concentration, and the uncertainty for typical low level environmental sample was evaluated. The combustion water recovery rate of different dried environmental sample was kept at about 80%, the minimum detection concentration of OBT ranged from 0.61 to 0.89 Bq/kg (dry weight), depending on the hydrogen content. It showed that this method is suitable for OBT analysis of environmental sample with stable recovery rate, and the combustion water yield of a sample with weight about 40 g would provide sufficient quantity for measurement on LSC.
Suzhou Nuclear Power Research Institute, CGNPG, 215004, PR China. Electronic address: huangyanjun@cgnpc.com.cn.
Yan-Jun
YJ
Huang
Suzhou Nuclear Power Research Institute, CGNPG, 215004, PR China. Electronic address: fannylvqin@163.com.
Fan
F
Zeng
Suzhou Nuclear Power Research Institute, CGNPG, 215004, PR China. Electronic address: zhangbing@cgnpc.com.cn.
Bing
B
Zhang
Suzhou Nuclear Power Research Institute, CGNPG, 215004, PR China. Electronic address: chen_cf@cgnpc.com.cn.
Chao-Feng
CF
Chen
Suzhou Nuclear Power Research Institute, CGNPG, 215004, PR China. Electronic address: qinhongjuan@cgnpc.com.cn.
Hong-Juan
HJ
Qin
Suzhou Nuclear Power Research Institute, CGNPG, 215004, PR China. Electronic address: wuliansheng@cgnpc.com.cn.
Lian-Sheng
LS
Wu
Suzhou Nuclear Power Research Institute, CGNPG, 215004, PR China. Electronic address: guoguoyin@cgnpc.com.cn.
Gui-Yin
GY
Guo
Suzhou Nuclear Power Research Institute, CGNPG, 215004, PR China. Electronic address: yanglitao@cgnpc.com.cn.
Li-Tao
LT
Yang
Suzhou Nuclear Power Research Institute, CGNPG, 215004, PR China. Electronic address: shangguanzhihong@cgnpc.com.cn.
Zhi-Hong
ZH
Shang-Guan
D004784:Environmental Monitoring / Q000379:methods*; D015203:Reproducibility of Results; D014316:Tritium / Q000032:analysis* / Q000737:chemistry*
D014316:Tritium
Environmental sample; Organically bound tritium (OBT); Tritium; Uncertainty evaluation