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. 2018 May 1;9(5):212. doi: 10.3390/mi9050212

Figure 5.

Figure 5

Results of SPME using standard sample: (a) 15.9 µM clenbuterol hydrochloride ion counts of the 15 min mean signal by commercial capillary; TIC mass range from 100 to 1000; (b) Different acetonitrile and water ratio with 5% ammonium hydroxide used as eluent and clenbuterol hydrochloride change within 15 min on elution; TIC mass range from 276 to 277; (c) clenbuterol hydrochloride ion counts by optimal chip configuration; (d) Clenbuterol hydrochloride ion counts by optimal chip configuration; the concentration is 3.2 µM.