In this work isotope mass spectrometry was adopted for the study of determination of zinc absorption by using a double label stable isotope technique. The methods of the sample digestion, separation and measurement of...In this work isotope mass spectrometry was adopted for the study of determination of zinc absorption by using a double label stable isotope technique. The methods of the sample digestion, separation and measurement of trace zinc by using thermal ionization mass spectrometer were established, and the isotopic ratios of zinc in the excrements and urine were measured accurately. The reliable zinc absorption was obtained from this.展开更多
This paper describes the method and way for the stable magnetism of VG354 mass spectrometer. Hall probe is fixed by technological innovation so that the magnetism can be stabilized . Sr and Nd isotopic ratio are morma...This paper describes the method and way for the stable magnetism of VG354 mass spectrometer. Hall probe is fixed by technological innovation so that the magnetism can be stabilized . Sr and Nd isotopic ratio are mormalized to 86Sr/88Sr=0.1194 and 146Nd/144Nd =0.7219. The 87Sr/86Sr (NBS987)=0.710228±10(n=24).The 146Nd/144Nd (La Jolla) =0.511860±6(n=9).展开更多
文摘In this work isotope mass spectrometry was adopted for the study of determination of zinc absorption by using a double label stable isotope technique. The methods of the sample digestion, separation and measurement of trace zinc by using thermal ionization mass spectrometer were established, and the isotopic ratios of zinc in the excrements and urine were measured accurately. The reliable zinc absorption was obtained from this.
文摘This paper describes the method and way for the stable magnetism of VG354 mass spectrometer. Hall probe is fixed by technological innovation so that the magnetism can be stabilized . Sr and Nd isotopic ratio are mormalized to 86Sr/88Sr=0.1194 and 146Nd/144Nd =0.7219. The 87Sr/86Sr (NBS987)=0.710228±10(n=24).The 146Nd/144Nd (La Jolla) =0.511860±6(n=9).
