“…Luck and Allegre (1983) In this paper, we will report Os isotope reported the half life value of (4.56 ± 0.12) X ratios in iron meteorites and iridosmines as well 1010y based on the meteoritic isochron. On the as Os reagents measured by ICP-MS. ICP-MS other hand, Lindner et al (1986) measured Os uses inductively coupled plasma (ICP) as an isotope ratios in HReO4 by two different types atmospheric ion source for a quadrupole mass of mass spectrometers, an inductively coupled spectrometer (Gray, 1975(Gray, , 1985Gray and Date, plasma mass spectrometer (ICP-MS) and a laser 1983; Houk et al, 1980). The most prelimina microprobe mass analyzer (LAMMA).…”