A method for determination of nilestriol in the fish by coupling direct insertion probe with mass spectrometer was established. When the fish be dewatered, nilestriol can be drawed with chloroform and the analysis can...A method for determination of nilestriol in the fish by coupling direct insertion probe with mass spectrometer was established. When the fish be dewatered, nilestriol can be drawed with chloroform and the analysis can be made by coupling direct insertion probe with mass spectrometer as the primary temperature at 100℃ and maintains for 30s, then the temperation rised to 300℃ at the rate of 150℃ · min^-1 and kept for 30s. The ratio of signal to noise(S/N) of nilestriol is 14 : 1 as the sample content is lng. The method issimple in operation and sensitive.展开更多
Morphine in complex background may be determined by tandem mass spectrometry. The result shows that the mass'spectrum of the second ionization of morphine fragment ion at m/z 285 is clear when the collision energy...Morphine in complex background may be determined by tandem mass spectrometry. The result shows that the mass'spectrum of the second ionization of morphine fragment ion at m/z 285 is clear when the collision energy is about 1.5V. At the same time the impurity peak in complex background was eliminated, selectivity and sensitivity of determination for morphine was raised with this method.展开更多
文摘A method for determination of nilestriol in the fish by coupling direct insertion probe with mass spectrometer was established. When the fish be dewatered, nilestriol can be drawed with chloroform and the analysis can be made by coupling direct insertion probe with mass spectrometer as the primary temperature at 100℃ and maintains for 30s, then the temperation rised to 300℃ at the rate of 150℃ · min^-1 and kept for 30s. The ratio of signal to noise(S/N) of nilestriol is 14 : 1 as the sample content is lng. The method issimple in operation and sensitive.
文摘Morphine in complex background may be determined by tandem mass spectrometry. The result shows that the mass'spectrum of the second ionization of morphine fragment ion at m/z 285 is clear when the collision energy is about 1.5V. At the same time the impurity peak in complex background was eliminated, selectivity and sensitivity of determination for morphine was raised with this method.
