Table 3.

Recovery of HCQS from spiked SureGard filters.

		Deionised Water	50:50 v/v Methanol/Water
2 mg HCQS	Immediate 5 min shaking	95.7%	87.3%
	30 min standing, 5 min shaking	95.3%	88.9%
75 mg HCQS	Immediate 5 min shaking	100.7%	94.4%
	30 min standing, 5 min shaking	100.2%	99.3%

One measurement was performed for each scenario (n = 1).