In the case of measuring the contents of volatile phenols in water by using 4 - AAP spectrophotometry, the purification of 4 - AAP has great influence on the test results.

• 用4-氨基安替比林(4-AAP)分光光度法测定水中挥发酚类含量时,4-AAP药品纯度对试验结果的影响很大。