PMID- 37192501
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20230530
LR  - 20230530
IS  - 1520-6882 (Electronic)
IS  - 0003-2700 (Linking)
VI  - 95
IP  - 21
DP  - 2023 May 30
TI  - Multi-pass Differential Photoacoustic Sensor for Real-Time Measurement of SF(6) 
      Decomposition Component H(2)S at the ppb Level.
PG  - 8214-8222
LID - 10.1021/acs.analchem.3c00003 [doi]
AB  - We designed and implemented a photoacoustic (PA) sensor for H(2)S detection in 
      SF(6) background gas based on a multi-pass differential photoacoustic cell (MDPC) 
      and a near-infrared distributed feedback (DFB) laser. In the MDPC apparatus, two 
      resonators with identical geometric parameters were vertically and symmetrically 
      embedded. The differential processing algorithm of two phase-reversed signals 
      realized the effective enhancement of the PA signal and suppressed the flow noise 
      in the dynamic sampling process. In addition, the lambda/4 buffer chamber in the MDPC 
      was utilized as a muffler to further reduce the flow noise and realize the 
      dynamic detection of H(2)S. The collimated excitation light was reflected 30 
      times in a multi-pass structure constituted of two gold-plated concave mirrors, 
      and an absorption path length of 4.92 m was achieved. Due to the high gas density 
      of SF(6), the relationship between the signal-to-noise ratio (SNR) and the gas 
      flow was different between SF(6) and N(2) background gases. The maximum flow rate 
      of the characteristic gas components detected in the SF(6) background is 150 
      standard cubic centimeters per minute (SCCM), which is lower than 350 SCCM in 
      N(2). The linearity property was analyzed, and the results show that the 
      sensitivity of the sensor to H(2)S in the SF(6) background was 27.3 muV/ppm. With 
      the structure, parameters, temperature, gas flow, and natural frequency of the 
      MDPC been optimized, a minimum detection limit (MDL) of 11 ppb was reached with 
      an averaging time of 1000 s, which furnished an effective preventive implement 
      for the safe operation of gas insulation equipment.
FAU - Zhao, Xinyu
AU  - Zhao X
AD  - School of Optoelectronic Engineering and Instrumentation Science, Dalian 
      University of Technology, Dalian, Liaoning 116024, China.
FAU - Guo, Min
AU  - Guo M
AUID- ORCID: 0000-0002-4533-2469
AD  - School of Optoelectronic Engineering and Instrumentation Science, Dalian 
      University of Technology, Dalian, Liaoning 116024, China.
FAU - Cui, Dongyu
AU  - Cui D
AD  - School of Optoelectronic Engineering and Instrumentation Science, Dalian 
      University of Technology, Dalian, Liaoning 116024, China.
FAU - Li, Chenxi
AU  - Li C
AD  - School of Optoelectronic Engineering and Instrumentation Science, Dalian 
      University of Technology, Dalian, Liaoning 116024, China.
FAU - Qi, Hongchao
AU  - Qi H
AD  - School of Optoelectronic Engineering and Instrumentation Science, Dalian 
      University of Technology, Dalian, Liaoning 116024, China.
FAU - Chen, Ke
AU  - Chen K
AD  - School of Optoelectronic Engineering and Instrumentation Science, Dalian 
      University of Technology, Dalian, Liaoning 116024, China.
FAU - Ma, Fengxiang
AU  - Ma F
AD  - Electric Power Research Institute, Net Anhui Electric Power Co., Ltd, Hefei, 
      Anhui 230601, China.
FAU - Huang, Jiayu
AU  - Huang J
AD  - School of Optoelectronic Engineering and Instrumentation Science, Dalian 
      University of Technology, Dalian, Liaoning 116024, China.
FAU - Zhang, Guangyin
AU  - Zhang G
AD  - School of Optoelectronic Engineering and Instrumentation Science, Dalian 
      University of Technology, Dalian, Liaoning 116024, China.
FAU - Zhao, Jikuan
AU  - Zhao J
AD  - School of Optoelectronic Engineering and Instrumentation Science, Dalian 
      University of Technology, Dalian, Liaoning 116024, China.
LA  - eng
PT  - Journal Article
DEP - 20230516
PL  - United States
TA  - Anal Chem
JT  - Analytical chemistry
JID - 0370536
SB  - IM
EDAT- 2023/05/16 19:10
MHDA- 2023/05/16 19:11
CRDT- 2023/05/16 16:43
PHST- 2023/05/16 19:11 [medline]
PHST- 2023/05/16 19:10 [pubmed]
PHST- 2023/05/16 16:43 [entrez]
AID - 10.1021/acs.analchem.3c00003 [doi]
PST - ppublish
SO  - Anal Chem. 2023 May 30;95(21):8214-8222. doi: 10.1021/acs.analchem.3c00003. Epub 
      2023 May 16.