MIR Spectroscopic Method for Detection of ¹⁴CO₂

The laser based detection technique is one possible method for real-time detection. But, it is typically available in the visible and NIR(near infrared) regions where the molecular absorption cross sections are too small. In the case of ¹⁴CO₂, the abundance is too low, and therefore, it is hard to detect it in visible and NIR regions even by using the sensitive detection techniques. We introduced the laser-based technique for the detection of ¹⁴CO₂ in gaseous effluent in nuclear industry. We demonstrated the OA-ICOS in MIR region, and observed the small absorption signal equivalent to the 10 ppb abundance of target isotopologue. But the system requires higher reliability and sensitivity for the real application. We hope that it can be an alternative for the ¹⁴CO₂ in the nuclear industry