Laboratories responsible for ensuring food safety seek to reduce the cost per analysis without compromising the accuracy and reliability of their results.
PPCPs comprise a diverse collection of thousands of chemical substances,including prescription and over-the-counter therapeutic drugs,veterinary drugs,fragrances,and cosmetics.
The matrix effects in liquid chromatography-electrospray ionization-mass spectrometry(LC-ESI-MS)analysis affect the accuracy of results,are difficult to compensate for and present a major challenge in
A method was developed for the separation and determination of C-peptide by high performance liquid chromatography-ultraviolet detection(HPLC-UV) and liquid chromatography-isotope dilution mass spectr
Two isotope dilution mass spectrometry(IDMS) methods were established and compared for absolute quantification of the mass fraction of an important clinical diagnostic marker,i.e.