Development of determination method of trace nickel in natural water by ID-oxygen added nitrogen-MIP-MS with direct measurement of liquid–liquid extracted organic phase |
| |
Authors: | Junling Bai Hirotoshi Sakagami Kanako Mantoku Ikuo Atsuya Nobuo Takahashi |
| |
Affiliation: | Department of Materials Science and Engineering , Kitami Institute of Technology , Kitami, Japan |
| |
Abstract: | This work introduces the development of a novel determination method of trace nickel (ng l–1 level) in natural water samples. Nickel in the water samples is liquid–liquid extracted into methyl isobutyl ketone (MIBK) as nickel-diethyldithiocarbamate (DDTC) complex, and isotope dilution-oxygen added nitrogen-microwave induced plasma mass spectrometry (ID-oxygen added nitrogen-MIP-MS) is conducted by direct measurement of the liquid–liquid extracted organic MIBK phase. The accuracy of the proposed method was confirmed by analysing certified reference materials (NRC NASS-5 seawater, NRC SLRS-3 riverine water and NRC SLRS-4 river water), and the analytical results obtained were in good agreement with the certified values. The detection limit for nickel is 1.3?ng?l?1 when the water sample is 50 times concentrated. The precision as RSD is <4%. The proposed method was applied to clarify the concentration-depth vertical profiles of nickel in Lake Mashu, Japan, as the Baseline Station of the United Nations GEMS/Water (Global Environment Monitoring System/Water) Programme. |
| |
Keywords: | nickel natural water isotope dilution liquid–liquid extraction microwave induced oxygen added nitrogen plasma mass spectrometry Lake Mashu |
|
|