| Desorption atmospheric pressure photoionization M Haapala, J Pól, V Saarela, V Arvola, T Kotiaho, RA Ketola, S Franssila, ... Analytical chemistry 79 (20), 7867-7872, 2007 | 306 | 2007 |
| Desorption atmospheric pressure photoionization–mass spectrometry in routine analysis of confiscated drugs TJ Kauppila, A Flink, M Haapala, UM Laakkonen, L Aalberg, RA Ketola, ... Forensic science international 210 (1-3), 206-212, 2011 | 79 | 2011 |
| Desorption and ionization mechanisms in desorption atmospheric pressure photoionization L Luosujarvi, V Arvola, M Haapala, V Saarela, S Franssila, T Kotiaho, ... Analytical chemistry 80 (19), 7460-7466, 2008 | 78 | 2008 |
| Direct analysis of illicit drugs by desorption atmospheric pressure photoionization TJ Kauppila, V Arvola, M Haapala, J Pól, L Aalberg, V Saarela, ... Rapid Communications in Mass Spectrometry 22 (7), 979-985, 2008 | 76 | 2008 |
| Glass microfabricated nebulizer chip for mass spectrometry V Saarela, M Haapala, R Kostiainen, T Kotiaho, S Franssila Lab on a Chip 7 (5), 644-646, 2007 | 71 | 2007 |
| Gas chromatography/mass spectrometry of polychlorinated biphenyls using atmospheric pressure chemical ionization and atmospheric pressure photoionization microchips L Luosujärvi, MM Karikko, M Haapala, V Saarela, S Huhtala, S Franssila, ... Rapid Communications in Mass Spectrometry: An International Journal Devoted …, 2008 | 63 | 2008 |
| Method and system for desorbing and ionizing chemical compounds from surfaces R Kostiainen, T Kauppila, M Haapala, J Pol, T Kotiaho US Patent 8,044,346, 2011 | 62 | 2011 |
| Microchip for combining gas chromatography or capillary liquid chromatography with atmospheric pressure photoionization-mass spectrometry M Haapala, L Luosujärvi, V Saarela, T Kotiaho, RA Ketola, S Franssila, ... Analytical chemistry 79 (13), 4994-4999, 2007 | 62 | 2007 |
| Cell adhesion and proliferation on common 3D printing materials used in stereolithography of microfluidic devices K Piironen, M Haapala, V Talman, P Järvinen, T Sikanen Lab on a Chip 20 (13), 2372-2382, 2020 | 60 | 2020 |
| A miniaturised 3D printed polypropylene reactor for online reaction analysis by mass spectrometry G Scotti, SME Nilsson, M Haapala, P Pöhö, GB af Gennäs, ... Reaction Chemistry & Engineering 2 (3), 299-303, 2017 | 50 | 2017 |
| Gas chromatography-microchip atmospheric pressure chemical ionization-mass spectrometry P Östman, L Luosujärvi, M Haapala, K Grigoras, RA Ketola, T Kotiaho, ... Analytical chemistry 78 (9), 3027-3031, 2006 | 45 | 2006 |
| Analysis of anabolic steroids in urine by gas chromatography–microchip atmospheric pressure photoionization-mass spectrometry with chlorobenzene as dopant L Hintikka, M Haapala, T Kuuranne, A Leinonen, R Kostiainen Journal of Chromatography A 1312, 111-117, 2013 | 44 | 2013 |
| Simple coupling of gas chromatography to electrospray ionization mass spectrometry N Brenner, M Haapala, K Vuorensola, R Kostiainen Analytical chemistry 80 (21), 8334-8339, 2008 | 44 | 2008 |
| Feasibility of gas chromatography–microchip atmospheric pressure photoionization-mass spectrometry in analysis of anabolic steroids L Hintikka, M Haapala, S Franssila, T Kuuranne, A Leinonen, ... Journal of Chromatography A 1217 (52), 8290-8297, 2010 | 41 | 2010 |
| Capillary photoionization: a high sensitivity ionization method for mass spectrometry M Haapala, T Suominen, R Kostiainen Analytical chemistry 85 (12), 5715-5719, 2013 | 39 | 2013 |
| Separation of nucleobases, nucleosides, and nucleotides using two zwitterionic silica-based monolithic capillary columns coupled with tandem mass spectrometry D Moravcová, M Haapala, J Planeta, T Hyötyläinen, R Kostiainen, ... Journal of Chromatography A 1373, 90-96, 2014 | 38 | 2014 |
| Microchip atmospheric pressure photoionization for analysis of petroleum by Fourier transform ion cyclotron resonance mass spectrometry M Haapala, JM Purcell, V Saarela, S Franssila, RP Rodgers, ... Analytical chemistry 81 (7), 2799-2803, 2009 | 37 | 2009 |
| Integrated liquid chromatography–heated nebulizer microchip for mass spectrometry M Haapala, V Saarela, J Pól, K Kolari, T Kotiaho, S Franssila, ... Analytica chimica acta 662 (2), 163-169, 2010 | 31 | 2010 |
| Analysis of selective androgen receptor modulators by gas chromatography-microchip atmospheric pressure photoionization-mass spectrometry L Luosujärvi, M Haapala, M Thevis, V Saarela, S Franssila, RA Ketola, ... Journal of the American Society for Mass Spectrometry 21, 310-316, 2010 | 29 | 2010 |
| Feasibility of capillary liquid chromatography–microchip-atmospheric pressure photoionization–mass spectrometry for pesticide analysis in tomato A Kruve, M Haapala, V Saarela, S Franssila, R Kostiainen, T Kotiaho, ... Analytica chimica acta 696 (1-2), 77-83, 2011 | 27 | 2011 |
