Table 2.

The accuracy of ethanol, isopropyl alcohol, and methanol at low, medium, and high-quality control levels for liquid and gel hand sanitisers (established via spike recovery studies).

Form	Analyte	Spike concentration (% v/v)	Mean recovery (%) ± 95% CI	RSD (%)	n
Liquid	Ethanol	0.480	101.2 ± 0.004	0.011	6
		0.750	100.2 ± 0.009	0.015	6
		0.900	99.5 ± 0.017	0.023	6
	IPA	0.480	100.5 ± 0.003	0.008	6
		0.750	100.2 ± 0.005	0.008	6
		0.900	99.5 ± 0.006	0.009	6
	Methanol	0.0120	98.5 ± 1.292	1.640	6
		0.0375	99.9 ± 0.687	0.859	6
		0.0500	101.5 ± 0.741	0.912	6
Gel	Ethanol	0.480	97.7 ± 0.004	0.011	6
		0.750	101.0 ± 0.003	0.006	6
		0.900	99.1 ± 0.008	0.011	6
	IPA	0.480	97.9 ± 0.002	0.005	6
		0.750	99.8 ± 0.003	0.005	6
		0.900	99.3 ± 0.006	0.009	6
	Methanol	0.0120	97.3 ± 0.624	0.801	6
		0.0375	101.8 ± 0.435	0.534	6
		0.0500	100.5 ± 1.077	1.340	6