CO<sub>2</sub> Laser Photoacoustic Spectrometer for Measuring Acetone in the Breath of Lung Cancer Patients
A CO<sub>2</sub> laser has the advantages of being high in power and having many laser lines in the 9–11 µm infrared region. Thus, a CO<sub>2</sub> laser photoacoustic spectrometer (PAS) can have a multi-component measurement capability for many gas compounds that have non-ze...
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doaj-c58f40247bca4cb891627398f88287c02020-11-25T02:48:59ZengMDPI AGBiosensors2079-63742020-05-0110555510.3390/bios10060055CO<sub>2</sub> Laser Photoacoustic Spectrometer for Measuring Acetone in the Breath of Lung Cancer PatientsMitrayana0Donni Kis Apriyanto1Mirza Satriawan2Department of Physics, Universitas Gadjah Mada, Yogyakarta 55281, IndonesiaDepartment of Physics, University of Lampung, Bandar Lampung 35141, IndonesiaDepartment of Physics, Universitas Gadjah Mada, Yogyakarta 55281, IndonesiaA CO<sub>2</sub> laser has the advantages of being high in power and having many laser lines in the 9–11 µm infrared region. Thus, a CO<sub>2</sub> laser photoacoustic spectrometer (PAS) can have a multi-component measurement capability for many gas compounds that have non-zero absorption coefficients at the laser lines, and therefore can be applied for measuring several volatile organic compounds (VOCs) in the human breath. We have developed a CO<sub>2</sub> laser PAS system for detecting acetone in the human breath. Although acetone has small absorption coefficients at the CO<sub>2</sub> laser lines, our PAS system was able to obtain strong photoacoustic (PA) signals at several CO<sub>2</sub> laser lines, with the strongest one being at the 10P20 line. Since at the 10P20 line, ethylene and ammonia also have significant absorption coefficients, these two gases have to be included in a multi-component measurement with acetone. We obtained the lowest detection limit of our system for the ethylene, acetone, and ammonia are 6 ppbv, 11 ppbv, and 31 ppbv, respectively. We applied our PAS system to measure these three VOCs in the breath of three groups of subjects, i.e., patients with lung cancer disease, patients with other lung diseases, and healthy volunteers.https://www.mdpi.com/2079-6374/10/6/55lung canceracetonevolatile organic compoundsCO2 laser photoacoustic |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Mitrayana Donni Kis Apriyanto Mirza Satriawan |
spellingShingle |
Mitrayana Donni Kis Apriyanto Mirza Satriawan CO<sub>2</sub> Laser Photoacoustic Spectrometer for Measuring Acetone in the Breath of Lung Cancer Patients Biosensors lung cancer acetone volatile organic compounds CO2 laser photoacoustic |
author_facet |
Mitrayana Donni Kis Apriyanto Mirza Satriawan |
author_sort |
Mitrayana |
title |
CO<sub>2</sub> Laser Photoacoustic Spectrometer for Measuring Acetone in the Breath of Lung Cancer Patients |
title_short |
CO<sub>2</sub> Laser Photoacoustic Spectrometer for Measuring Acetone in the Breath of Lung Cancer Patients |
title_full |
CO<sub>2</sub> Laser Photoacoustic Spectrometer for Measuring Acetone in the Breath of Lung Cancer Patients |
title_fullStr |
CO<sub>2</sub> Laser Photoacoustic Spectrometer for Measuring Acetone in the Breath of Lung Cancer Patients |
title_full_unstemmed |
CO<sub>2</sub> Laser Photoacoustic Spectrometer for Measuring Acetone in the Breath of Lung Cancer Patients |
title_sort |
co<sub>2</sub> laser photoacoustic spectrometer for measuring acetone in the breath of lung cancer patients |
publisher |
MDPI AG |
series |
Biosensors |
issn |
2079-6374 |
publishDate |
2020-05-01 |
description |
A CO<sub>2</sub> laser has the advantages of being high in power and having many laser lines in the 9–11 µm infrared region. Thus, a CO<sub>2</sub> laser photoacoustic spectrometer (PAS) can have a multi-component measurement capability for many gas compounds that have non-zero absorption coefficients at the laser lines, and therefore can be applied for measuring several volatile organic compounds (VOCs) in the human breath. We have developed a CO<sub>2</sub> laser PAS system for detecting acetone in the human breath. Although acetone has small absorption coefficients at the CO<sub>2</sub> laser lines, our PAS system was able to obtain strong photoacoustic (PA) signals at several CO<sub>2</sub> laser lines, with the strongest one being at the 10P20 line. Since at the 10P20 line, ethylene and ammonia also have significant absorption coefficients, these two gases have to be included in a multi-component measurement with acetone. We obtained the lowest detection limit of our system for the ethylene, acetone, and ammonia are 6 ppbv, 11 ppbv, and 31 ppbv, respectively. We applied our PAS system to measure these three VOCs in the breath of three groups of subjects, i.e., patients with lung cancer disease, patients with other lung diseases, and healthy volunteers. |
topic |
lung cancer acetone volatile organic compounds CO2 laser photoacoustic |
url |
https://www.mdpi.com/2079-6374/10/6/55 |
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