Question: what is the difference between uv and hplc?
Answer: The retention time of napropamide by the HPLC was 10.2 min and running time for each sample took 15 min whereas determination by UV-spectrophotometer took only a few seconds. Therefore, UV-spectrophotometry method is much faster than HPLC-UV method. ... Moreover, HPLC is more expensive than the UV-spectrophotometer.