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Immediately measure the absorbance at 500 nm, Appendix II B, using in the reference cell a solution prepared by treating 20 mL of water in the same manner.

The absorbance is not greater than that obtained by treating 20 mL of a 0.00125% w/v solution of iopamidol impurity A EPCRS in water in the same manner and beginning at the words "Place the solution¡­".(500 ppm).

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µÚÒ»¾äÖÐin the reference cellÓ¦¸Ã¿ÉÒÔ·­Òë³É²Î±È³Ø

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