欧洲版-第二页翻译

Appearance of solution S. For type I closures,solution S is not more opalescent发乳白色光的than reference suspension 悬浮液II(2.2.1)and for type II closures,solution S is not more opalescent than reference suspension III.Solution S is not more intensely coloured than reference solution GY5. Acidity or alkalinity酸度或碱度 To 20 ml of solution S add 0.1mL of bromothymol blue solution溴百里酚蓝溶液R1.Not more than 0.3mL of 0.01M sodium hydroxide氢氧化钠or 0.8mL of 0.01M hydrochloric acid盐酸is required to change the colour of the indicator 指示剂to blue or yellow,respectively. Absorbance Carry out the test with 5h preparation of solution S.Filter solution S through a membrance filter 膜过滤(nominal pore size 0.45 μm),rejecting the first few milliltres of filtrate.Measure the absorbance of the f