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内毒素参照品为冻干状物,常用规格有2μg和5μg两种。临用时以无热原生理盐水配制成每ml含10mg的溶液。由于每ml含10ng的内毒素参照品溶液最小配制量为1 ml,每次对照实验仅用0.1 ml。两年来,我们将每次剩余的内毒素参照品溶液贮于冰箱中待用,使用中发现,经放置后的本品溶液再次使用有时得不到阳性结果,使实验结果无法判断。经与同批号新鲜配制的本品溶液做对照实验,即发现放置后的本品溶液失活。由于生产单位对此无说明,我们考虑可能与存
Endotoxin reference material for the freeze-dried material, commonly used specifications are 2μg and 5μg two. Pro-use of pyrogen-free saline formulated as a solution containing 10mg per ml. Since 10 ng of endotoxin reference solution per ml contains 1 ml of the minimum preparation, each control experiment uses only 0.1 ml. In the past two years, we will store each remaining reference solution of endotoxin in the refrigerator for use. In use, we find that after the solution is used again, the positive result may not be obtained again, and the experimental result can not be judged. With the same batch of freshly prepared solution of this product to do the control experiment, that is placed after the solution was inactivated. As the production unit did not say this, we consider the possibility and the deposit