Sensors' array of aspiration ion mobility spectrometer as a tool for bacteria discrimination

被引:13
作者
Bocos-Bintintan, Victor [1 ]
Thomas, C. L. Paul [2 ]
Ratiu, Ileana Andreea [3 ,4 ]
机构
[1] Babes Bolyai Univ, Fac Environm Sci & Engn, 30 Fantanele, RO-400294 Cluj Napoca, Romania
[2] Loughborough Univ, Sch Sci, Dept Chem, Epinal Way, Loughborough LE11 3TU, Leics, England
[3] Babes Bolyai Univ, Fac Chem & Chem Engn, 11 Arany Janos, RO-400028 Cluj Napoca, Romania
[4] Nicholas Copernicus Univ, Interdisciplinary Ctr Modern Technol, Fac Chem, Dept Environm Chem & Bioanalyt, 7 Gagarina Str, PL-87100 Torun, Poland
关键词
Aspiration ion mobility spectrometry; Bacterial profile; Headspace air samples; Multisensory device; Statistical analysis; VOLATILE ORGANIC-COMPOUNDS; IDENTIFICATION; CULTURES;
D O I
10.1016/j.talanta.2019.120233
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
The possibility of achieving bacterial discrimination using a miniaturized aspiration ion mobility spectrometer model ChemPro-100i (Environics Oy) has been tested by interrogating the headspace air samples above in vitro bacterial cultures of three species - Escherichia coli, Bacillus subtilis and Staphylococcus aureus, respectively. The ChemPro-100i highly integrated seven sensor array, composed of one a-IMS cell, three MOS (metal oxide sensors), one FET (field effect transistor) sensor and two SC (semiconductor) sensors, provided enough analytical information to discriminate between the three bacterial species. Statistical data processing using either principal component analysis (PCA) or partial least squares discriminant analysis (PLS-DA) was accomplished. We concluded that although the data from the aspiration-type ion mobility sensor, with its 16 ion detectors, is absolutely sufficient to discriminate between various bacteria using their volatile compounds' chemical profile, the other six sensors deliver additional, valuable information.
引用
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页数:8
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