Comparison of μ-ATR-FTIR spectroscopy and py-GCMS as identification tools for microplastic particles and fibers isolated from river sediments

被引:214
作者
Kaeppler, Andrea [1 ,2 ]
Fischer, Marten [3 ]
Scholz-Boettcher, Barbara M. [3 ]
Oberbeckmann, Sonja [4 ]
Labrenz, Matthias [4 ]
Fischer, Dieter [1 ]
Eichhorn, Klaus-Jochen [1 ]
Voit, Brigitte [1 ,2 ]
机构
[1] Leibniz Inst Polymerforsch Dresden eV IPF, Hohe Str 6, D-01069 Dresden, Germany
[2] Tech Univ Dresden, Organ Chem Polymere, D-01062 Dresden, Germany
[3] Carl von Ossietzky Univ Oldenburg, Inst Chem & Biol Marine Environm ICBM, POB 2503, D-26111 Oldenburg, Germany
[4] Leibniz Inst Balt Sea Res Warnemunde IOW, Seestr 15, D-18119 Rostock, Germany
关键词
Microplastics; py-GCMS; ATR FTIR; Environmental samples; Comparison; Validation; CHROMATOGRAPHY-MASS-SPECTROMETRY; TRANSFORM INFRARED-SPECTROSCOPY; THERMALLY ASSISTED HYDROLYSIS; ENVIRONMENTAL-SAMPLES; MARINE-ENVIRONMENT; SPATIAL-DISTRIBUTION; POLLUTED SEDIMENTS; SYNTHETIC-POLYMERS; QUANTIFICATION; RAMAN;
D O I
10.1007/s00216-018-1185-5
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
In recent years, many studies on the analysis of microplastics (MP) in environmental samples have been published. These studies are hardly comparable due to different sampling, sample preparation, as well as identification and quantification techniques. Here, MP identification is one of the crucial pitfalls. Visual identification approaches using morphological criteria alone often lead to significant errors, being especially true for MP fibers. Reliable, chemical structure-based identification methods are indispensable. In this context, the frequently used vibrational spectroscopic techniques but also thermoanalytical methods are established. However, no critical comparison of these fundamentally different approaches has ever been carried out with regard to analyzing MP in environmental samples. In this blind study, we investigated 27 single MP particles and fibers of unknown material isolated from river sediments. Successively micro-attenuated total reflection Fourier transform infrared spectroscopy (mu-ATR-FTIR) and pyrolysis gas chromatography-mass spectrometry (py-GCMS) in combination with thermochemolysis were applied. Both methods differentiated between plastic vs. non-plastic in the same way in 26 cases, with 19 particles and fibers (22 after re-evaluation) identified as the same polymer type. To illustrate the different approaches and emphasize the complementarity of their information content, we exemplarily provide a detailed comparison of four particles and three fibers and a critical discussion of advantages and disadvantages of both methods.
引用
收藏
页码:5313 / 5327
页数:15
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