Table 2. The robustness and ruggedness of the conditions of the proposed procedure for determination of OLZ and QUT.

Variables	Drug	Recovery % ±RSD
Robustness results at pH =2.5	OLZ	98.0 ± 0.60
	QUT	98.7 ± 0.70
Ruggedness Analyst 1	OLZ	98.4 ± 0.60
	QUT	98.9 ± 0.50
Ruggedness Analyst 2	OLZ	98.1 ± 0.60
	QUT	99.0 ± 0.70