【判断题】【消耗次数:1】
单体黄酮的含量测定,如葛根中葛根素的测定,只能用高效液相色谱法,不能用薄层扫描法或者荧光分光光度法。
正确
错误
参考答案:
复制
纠错
相关题目
【判断题】 中药制剂中总黄酮的含量测定,可采用紫外分光光度法
①  正确
②  错误
【单选题】 分光光度法的吸光度与( )无光
①  入射光的波长
②  液层的高度
③  液层的厚度
④  溶液的浓度
【多选题】 紫外分光光度法可用于药物的
①  含量测定
②  鉴别
③  杂质检查
④  分离
【单选题】 分光光度法中,摩尔吸光系数( )有关
①  液层的厚度
②  光的强度
③  溶液的浓度
④  溶质的性质
【判断题】 高效液相色谱法对测定中药制剂中单体生物碱有很好的分离优势
①  正确
②  错误
【单选题】 在分光光度法中,宜选用的吸光度读数范围为
①  0~0.2
②  0.2~0.8
③  0.3~1.0
④  1.0~2.0
【单选题】 紫外可见分光光度法中吸收系数法的原理是
①  比尔定律
②  被测组分与对照品吸收度相同
③  不同物质吸收系数不同
④  结构相似的组分相互不干扰
⑤  被测组分与杂质吸收系数不同
【单选题】 原子吸收分光光度法选择性好是因为( )
①  检测器灵敏度高
②  原子蒸气中基态原子数不受温度影响
③  原子化效率高
④  光源发出的特征辐射只能被特定的基态原子所吸收
【判断题】 原子吸收分光光度法用标准加入法定量不能消除背景干扰。
①  正确
②  错误
【单选题】 原子吸收分光光度法中,基体效应干扰可采用( )消除。
①  加入保护剂
②  扣除背景
③  采用标准加入法
④  加入缓冲剂
随机题目
【单选题】 Which sentence is correct?
①  Returning home from work, he saw supper waiting for him in the kitchen.
②  Returning home after work, supper was waiting for him in the kitchen.
【单选题】 A number of foreign scholars [] invited to contribute articles to the magazine.
①  is
②  are
【单选题】 How to operate this computer? Is this a complete sentence?
①  Yes
②  No
【单选题】 The man was forced to steal a loaf of bread who was hungry. Find any misplaced modifier in the sentence.
①  The
②  a loaf of
③  who was hungry
【单选题】 Pop music is such an important part of society [] it has even influenced our language.
①  as
②  that
③  which
④  where
【单选题】 The companies are working together to create [] they hope will be the best means of transport in the 21st century.
①  which
②  that
③  what
④  who
【单选题】 To succeed in our future goal, [] we students really need to do is to study as hard as possible.
①  that
②  how
③  what
④  why
【单选题】 The drivers are told to drive carefully on the radio. Find any misplaced modifier in the sentence.
①  on the radio
②  the
③  carefully
【单选题】 The trees stand nearly barren; their leaves lay on the ground. Identify the mistake in the sentence.
①  stand
②  barren
③  leaves
④  lay
【单选题】 I would accept that there was a bias in some key areas of British life, [] that bias has now gone.
①  or
②  and
③  but
④  so