2. Which of the following methods is not commonly used to separate interfering components? ( )
A: Precipitation separation method
B: Titration analysis
C: Ion exchange method
D: Chromatographic separation
A: Precipitation separation method
B: Titration analysis
C: Ion exchange method
D: Chromatographic separation
举一反三
- The purification methods commonly used in the analysis of traditional<br/>Chinese medicine preparations include ( ) A: Liquid-liquid extraction B: chromatography C: precipitation method D: distillation
- Which of the following methods is commonly used for total carbohydrates determination？ A: Phenol-sulfuric acid method B: DNS method C: Muson Walker method D: Somogyi- Nelson method
- The most commonly used methods for clinical examination of Ascaris<br/>lumbricoides are () A: Floating polymerization of saturated brine B: Direct smear method C: Insect identification D: Water washing precipitation method
- Which of the following describes the two typical methods for material anthropogenic flow analysis A: The dynamic method tracing material flow process and the STAF method focusing on the specific area B: The mass conservation method and the statistical analysis method C: Material flow analysis method and life cycle analysis method D: Bottom-up method and top-down method
- If the chromatographic operating conditions are not easily controlled to be unchanged during measurement process, which of the following is the better method to determine the component content() A: normalization method B: external standard method C: internal standard method D: calibration curve method