High-Sensitivity Differential Helmholtz Photoacoustic System Combined with the Herriott Multipass Cell and Its Application in Seed Respiration.
Guo G, Li L, Zhou Y, Gong T, Tian Y, Sun X, Cui J, Shi S, Guo Z, He X, Qiu X, Sun J, Jiang C, Fittschen C, Li C.
Guo G, et al.
Anal Chem. 2024 May 14;96(19):7730-7737. doi: 10.1021/acs.analchem.4c00963. Epub 2024 May 4.
Anal Chem. 2024.
PMID: 38703107
The normalized noise equivalent absorption coefficient (NNEA) was 8.64 10(-11) cm(-1).W.Hz(-1/2) [signal-to-noise ratio, (SNR) = 1] and according to the Allan variance analysis, a minimum detection limit of 500 ppb could be achieved for CO(2) at 1204 s, which demonstrates the lon …
The normalized noise equivalent absorption coefficient (NNEA) was 8.64 10(-11) cm(-1).W.Hz(-1/2) [signal-to-noise ratio, (SNR) = 1] and acco …