Intercomparison of nitrous acid (HONO) measurement techniques in a megacity (Beijing)

Leigh R. Crilley, Louisa J. Kramer, Bin Ouyang, Jun Duan, Wenqian Zhang, Shengrui Tong, Maofa Ge, Ke Tang, Min Qin, Pinhua Xie, Marvin D. Shaw, Alastair C. Lewis, Archit Mehra, Thomas J. Bannan, Stephen D. Worrall, Michael Priestley, Asan Bacak, Hugh Coe, James Allan, Carl J. PercivalOlalekan A.M. Popoola, Roderic L. Jones, William J. Bloss*

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

Nitrous acid (HONO) is a key determinant of the daytime radical budget in the daytime boundary layer, with quantitative measurement required to understand OH radical abundance. Accurate and precise measurements of HONO are therefore needed; however HONO is a challenging compound to measure in the field, in particular in a chemically complex and highly polluted environment. Here we report an intercomparison exercise between HONO measurements performed by two wet chemical techniques (the commercially available a long-path absorption photometer (LOPAP) and a custom-built instrument) and two broadband cavity-enhanced absorption spectrophotometer (BBCEAS) instruments at an urban location in Beijing. In addition, we report a comparison of HONO measurements performed by a time-of-flight chemical ionization mass spectrometer (ToF-CIMS) and a selected ion flow tube mass spectrometer (SIFT-MS) to the more established techniques (wet chemical and BBCEAS). The key finding from the current work was that all instruments agree on the temporal trends and variability in HONO (r2 > 0.97), yet they displayed some divergence in absolute concentrations, with the wet chemical methods consistently higher overall than the BBCEAS systems by between 12 % and 39 %. We found no evidence for any systematic bias in any of the instruments, with the exception of measurements near instrument detection limits. The causes of the divergence in absolute HONO concentrations were unclear, and may in part have been due to spatial variability, i.e. differences in instrument location and/or inlet position, but this observation may have been more associative than casual.

Original languageEnglish
Pages (from-to)6449-6463
Number of pages15
JournalAtmospheric Measurement Techniques
Volume12
Issue number12
DOIs
Publication statusPublished - 9 Dec 2019

Fingerprint

megacity
cavity
acid
spectrometer
divergence
chemical method
photometer
ionization
boundary layer
ion
chemical

Bibliographical note

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Cite this

Crilley, L. R., Kramer, L. J., Ouyang, B., Duan, J., Zhang, W., Tong, S., ... Bloss, W. J. (2019). Intercomparison of nitrous acid (HONO) measurement techniques in a megacity (Beijing). Atmospheric Measurement Techniques, 12(12), 6449-6463. https://doi.org/10.5194/amt-12-6449-2019
Crilley, Leigh R. ; Kramer, Louisa J. ; Ouyang, Bin ; Duan, Jun ; Zhang, Wenqian ; Tong, Shengrui ; Ge, Maofa ; Tang, Ke ; Qin, Min ; Xie, Pinhua ; Shaw, Marvin D. ; Lewis, Alastair C. ; Mehra, Archit ; Bannan, Thomas J. ; Worrall, Stephen D. ; Priestley, Michael ; Bacak, Asan ; Coe, Hugh ; Allan, James ; Percival, Carl J. ; Popoola, Olalekan A.M. ; Jones, Roderic L. ; Bloss, William J. / Intercomparison of nitrous acid (HONO) measurement techniques in a megacity (Beijing). In: Atmospheric Measurement Techniques. 2019 ; Vol. 12, No. 12. pp. 6449-6463.
@article{7bf4488f97504a35bb66b34f730ab928,
title = "Intercomparison of nitrous acid (HONO) measurement techniques in a megacity (Beijing)",
abstract = "Nitrous acid (HONO) is a key determinant of the daytime radical budget in the daytime boundary layer, with quantitative measurement required to understand OH radical abundance. Accurate and precise measurements of HONO are therefore needed; however HONO is a challenging compound to measure in the field, in particular in a chemically complex and highly polluted environment. Here we report an intercomparison exercise between HONO measurements performed by two wet chemical techniques (the commercially available a long-path absorption photometer (LOPAP) and a custom-built instrument) and two broadband cavity-enhanced absorption spectrophotometer (BBCEAS) instruments at an urban location in Beijing. In addition, we report a comparison of HONO measurements performed by a time-of-flight chemical ionization mass spectrometer (ToF-CIMS) and a selected ion flow tube mass spectrometer (SIFT-MS) to the more established techniques (wet chemical and BBCEAS). The key finding from the current work was that all instruments agree on the temporal trends and variability in HONO (r2 > 0.97), yet they displayed some divergence in absolute concentrations, with the wet chemical methods consistently higher overall than the BBCEAS systems by between 12 {\%} and 39 {\%}. We found no evidence for any systematic bias in any of the instruments, with the exception of measurements near instrument detection limits. The causes of the divergence in absolute HONO concentrations were unclear, and may in part have been due to spatial variability, i.e. differences in instrument location and/or inlet position, but this observation may have been more associative than casual.",
author = "Crilley, {Leigh R.} and Kramer, {Louisa J.} and Bin Ouyang and Jun Duan and Wenqian Zhang and Shengrui Tong and Maofa Ge and Ke Tang and Min Qin and Pinhua Xie and Shaw, {Marvin D.} and Lewis, {Alastair C.} and Archit Mehra and Bannan, {Thomas J.} and Worrall, {Stephen D.} and Michael Priestley and Asan Bacak and Hugh Coe and James Allan and Percival, {Carl J.} and Popoola, {Olalekan A.M.} and Jones, {Roderic L.} and Bloss, {William J.}",
note = "{\circledC} Author(s) 2019. This work is distributed under the Creative Commons Attribution 4.0 License.",
year = "2019",
month = "12",
day = "9",
doi = "10.5194/amt-12-6449-2019",
language = "English",
volume = "12",
pages = "6449--6463",
number = "12",

}

Crilley, LR, Kramer, LJ, Ouyang, B, Duan, J, Zhang, W, Tong, S, Ge, M, Tang, K, Qin, M, Xie, P, Shaw, MD, Lewis, AC, Mehra, A, Bannan, TJ, Worrall, SD, Priestley, M, Bacak, A, Coe, H, Allan, J, Percival, CJ, Popoola, OAM, Jones, RL & Bloss, WJ 2019, 'Intercomparison of nitrous acid (HONO) measurement techniques in a megacity (Beijing)', Atmospheric Measurement Techniques, vol. 12, no. 12, pp. 6449-6463. https://doi.org/10.5194/amt-12-6449-2019

Intercomparison of nitrous acid (HONO) measurement techniques in a megacity (Beijing). / Crilley, Leigh R.; Kramer, Louisa J.; Ouyang, Bin; Duan, Jun; Zhang, Wenqian; Tong, Shengrui; Ge, Maofa; Tang, Ke; Qin, Min; Xie, Pinhua; Shaw, Marvin D.; Lewis, Alastair C.; Mehra, Archit; Bannan, Thomas J.; Worrall, Stephen D.; Priestley, Michael; Bacak, Asan; Coe, Hugh; Allan, James; Percival, Carl J.; Popoola, Olalekan A.M.; Jones, Roderic L.; Bloss, William J.

In: Atmospheric Measurement Techniques, Vol. 12, No. 12, 09.12.2019, p. 6449-6463.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Intercomparison of nitrous acid (HONO) measurement techniques in a megacity (Beijing)

AU - Crilley, Leigh R.

AU - Kramer, Louisa J.

AU - Ouyang, Bin

AU - Duan, Jun

AU - Zhang, Wenqian

AU - Tong, Shengrui

AU - Ge, Maofa

AU - Tang, Ke

AU - Qin, Min

AU - Xie, Pinhua

AU - Shaw, Marvin D.

AU - Lewis, Alastair C.

AU - Mehra, Archit

AU - Bannan, Thomas J.

AU - Worrall, Stephen D.

AU - Priestley, Michael

AU - Bacak, Asan

AU - Coe, Hugh

AU - Allan, James

AU - Percival, Carl J.

AU - Popoola, Olalekan A.M.

AU - Jones, Roderic L.

AU - Bloss, William J.

N1 - © Author(s) 2019. This work is distributed under the Creative Commons Attribution 4.0 License.

PY - 2019/12/9

Y1 - 2019/12/9

N2 - Nitrous acid (HONO) is a key determinant of the daytime radical budget in the daytime boundary layer, with quantitative measurement required to understand OH radical abundance. Accurate and precise measurements of HONO are therefore needed; however HONO is a challenging compound to measure in the field, in particular in a chemically complex and highly polluted environment. Here we report an intercomparison exercise between HONO measurements performed by two wet chemical techniques (the commercially available a long-path absorption photometer (LOPAP) and a custom-built instrument) and two broadband cavity-enhanced absorption spectrophotometer (BBCEAS) instruments at an urban location in Beijing. In addition, we report a comparison of HONO measurements performed by a time-of-flight chemical ionization mass spectrometer (ToF-CIMS) and a selected ion flow tube mass spectrometer (SIFT-MS) to the more established techniques (wet chemical and BBCEAS). The key finding from the current work was that all instruments agree on the temporal trends and variability in HONO (r2 > 0.97), yet they displayed some divergence in absolute concentrations, with the wet chemical methods consistently higher overall than the BBCEAS systems by between 12 % and 39 %. We found no evidence for any systematic bias in any of the instruments, with the exception of measurements near instrument detection limits. The causes of the divergence in absolute HONO concentrations were unclear, and may in part have been due to spatial variability, i.e. differences in instrument location and/or inlet position, but this observation may have been more associative than casual.

AB - Nitrous acid (HONO) is a key determinant of the daytime radical budget in the daytime boundary layer, with quantitative measurement required to understand OH radical abundance. Accurate and precise measurements of HONO are therefore needed; however HONO is a challenging compound to measure in the field, in particular in a chemically complex and highly polluted environment. Here we report an intercomparison exercise between HONO measurements performed by two wet chemical techniques (the commercially available a long-path absorption photometer (LOPAP) and a custom-built instrument) and two broadband cavity-enhanced absorption spectrophotometer (BBCEAS) instruments at an urban location in Beijing. In addition, we report a comparison of HONO measurements performed by a time-of-flight chemical ionization mass spectrometer (ToF-CIMS) and a selected ion flow tube mass spectrometer (SIFT-MS) to the more established techniques (wet chemical and BBCEAS). The key finding from the current work was that all instruments agree on the temporal trends and variability in HONO (r2 > 0.97), yet they displayed some divergence in absolute concentrations, with the wet chemical methods consistently higher overall than the BBCEAS systems by between 12 % and 39 %. We found no evidence for any systematic bias in any of the instruments, with the exception of measurements near instrument detection limits. The causes of the divergence in absolute HONO concentrations were unclear, and may in part have been due to spatial variability, i.e. differences in instrument location and/or inlet position, but this observation may have been more associative than casual.

UR - http://www.scopus.com/inward/record.url?scp=85076453565&partnerID=8YFLogxK

UR - https://www.atmos-meas-tech.net/12/6449/2019/

U2 - 10.5194/amt-12-6449-2019

DO - 10.5194/amt-12-6449-2019

M3 - Article

AN - SCOPUS:85076453565

VL - 12

SP - 6449

EP - 6463

IS - 12

ER -

Crilley LR, Kramer LJ, Ouyang B, Duan J, Zhang W, Tong S et al. Intercomparison of nitrous acid (HONO) measurement techniques in a megacity (Beijing). Atmospheric Measurement Techniques. 2019 Dec 9;12(12):6449-6463. https://doi.org/10.5194/amt-12-6449-2019