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易挥发的物质:
擦拭回收率:不用干燥,喷涂后立即取样
淋洗回收率(separate和grab):不用干燥,喷涂后立即取样
关于擦拭取样回收率研究的一种方式:
Some companies may choose to perform a recovery study twice. The first study would be swabbingthe spiked residue immediately after spiking, and the second would involve swabbing after a typical overnight (or equivalent) time of drying, which would demonstrate that with adequate conditions, the residue should not be measured (or would be measured with very low recovery of the originally spiked amount) .???
请问第二次进行擦拭回收率研究的意义何在??难道有价值吗???
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