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. 2020 Sep 21;20(18):5402. doi: 10.3390/s20185402

Figure 6.

Figure 6

(a) Raw MIR spectra (500–4000 cm−1) of PBS samples (concentration range: 0–20 mmol/L) (b) the raw spectra after noise removal and base lactate correction (n = 15). Several peaks were identified in the footprint region (700–1500 cm−1).