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The hardness loss for control, sucralose, ethyl butyrate, triacetin, hexyl acetate and ethyl maltol were (0.01 ± 6.41, 8.67 ± 5.84, and 15.45 ± 4.02, 27.45 ± 7.19, 21.57 ± 5.76, and 7.80 ± 2.00) %, respectively (mean ± S.D.). Student t-tests were performed control vs. individual flavored e-liquid and statistical differences were indicated as: * = p<0.05 or ** = p<0.005.
