- abstract:
A precise and simple method for the determination of lithium concentrations in small amounts of silicate sample was developed by applying isotope dilution-inductively coupled plasma-mass spectrometry (ID-ICP-MS). Samples plus a Li spike were digested with HF-HClO4, dried and diluted with HNO3, and measured by ICP-MS. No matrix effects were observed for 7Li/6Li in rock solutions with a dilution factor (DF) of ≥ 97 at an ICP power of 1.7 kW. By this method, the determination of 0.5μg g-1Li in a silicate sample of 1 mg can be made with a blank correction of < 1%. Lithium contents of ultrabasic to acidic silicate reference materials (JP-1,JB-2, JB-3, JA-1, JA-2, JA-3, JR-1 and JR-2 from the Geological Survey of Japan, and PCC-1 from the US Geological Survey) and chondrites (three different Allende and one Murchison sample) of 8 to 81 mg were determined. The relative standard deviation(RSD) was typically < 1.7%. Lithium contents of these samples were further determined by isotope dilution-thermal ionisation mass spectrometry (ID-TIMS). The relative differences between ID-ICP-MS and ID-TIMS were typically < 2%, indicating the high accuracy of ID-ICP-MS developed in this study.
- doi: 10.1111/j.1751-908X.2004.tb00756.x
- modified at 2020-10-13
@article{20191015111023-845326,
author = "Takuya Moriguti and Akio Makishima and Eizo Nakamura",
title = "Determination of Lithium Contents in silicates by Isotope Dilution ICP-MS and Its Evaluation by Isotope Dilution Thermal Ionisation Mass Spectrometry",
journal = "Geostandars and geoanalytical research",
year = "2004",
number = "3",
volume = "28",
pages = "371-382",
doi = "10.1111/j.1751-908X.2004.tb00756.x",
}| caption | ID | rowname | stone | ||
|---|---|---|---|---|---|
| Table 5b. Analytical results for lithium (μg g-1) in chondrites by TIMS pub | 20200210110431-698369 | lithium (Moriguti et al., 2004) | 4 | ||
| Table 3. Li isotope ratios of meteorites by TIMS pub | 20200210095505-577446 | d7Li (Moriguti, 2004) | 4 | ||
| Table 5a. Analytical results for lithium (μg g-1) in chondrites by ICP-MS pub | 20191015113719-157039 | lithium (Moriguti et al., 2004) | 4 | ||
| Table 4a. Analytical results for lithium in silicate reference materials by ICP-MS pub | 20191015112429-122877 | lithium (Moriguti et al., 2004) | 8 | ||
| Table 4b. Analytical results for lithium in silicate reference materials by TIMS pub | 20200210102512-854686 | lithium (Moriguti et al., 2004) | 8 | ||