| 单词 | screening agent | 
| 释义 | screening agent [`skrēn·iŋ ´ā·jǝnt]  ANALYTICAL CHEMISTRY A nonchelating dye used to improve the colorimetric end point of a complexometric titration; a dye addition forms a complementary pair of colors with the metalized and unmetalized forms of the end- point indicator.  | 
	
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