In general, biological organisms have the ability to absorb a specific element selectively. Holcombe and his co-workers reported that copper, nickel and cobalt could be separated from riverine and sea-water samples an...In general, biological organisms have the ability to absorb a specific element selectively. Holcombe and his co-workers reported that copper, nickel and cobalt could be separated from riverine and sea-water samples and cadmium from river water samples by unicellular green algae and were determined by slurry GFAAS. Dar-展开更多
The background absorption of Lu and Yb matrices was studied. The experimental results show that there is a significantly wavelength-dependent. The effects of ashing temperature, heating mode, atomization temperature, ...The background absorption of Lu and Yb matrices was studied. The experimental results show that there is a significantly wavelength-dependent. The effects of ashing temperature, heating mode, atomization temperature, recording time and matrix modifiers affecting the non-specific absorption of Lu and Yb matrices were discussed.展开更多
The effects of background absorption of TmCl 3 and Tm(NO 3) 3 matrices in graphite furnace atomic absorption spectrometry(GFAAS) were inverstigated. The experiments demonstrated that the background absorption of Tm...The effects of background absorption of TmCl 3 and Tm(NO 3) 3 matrices in graphite furnace atomic absorption spectrometry(GFAAS) were inverstigated. The experiments demonstrated that the background absorption of Tm matrices is obviously wavelength dependent. The background absorption of TmCl 3 is larger than that of Tm(NO 3) 3, especially in short wavelength region. The background absorption of TmCl 3 is decreased significantly as the ashing temperature increases and that of Tm matrices is eliminated completely at about 1900 ℃. The time distribution of background signal is related to the atomization temperature and the heating mode of atomization HNO 3 can be used to reduce the background absorption of TmCl 3 matrix.展开更多
文摘In general, biological organisms have the ability to absorb a specific element selectively. Holcombe and his co-workers reported that copper, nickel and cobalt could be separated from riverine and sea-water samples and cadmium from river water samples by unicellular green algae and were determined by slurry GFAAS. Dar-
文摘The background absorption of Lu and Yb matrices was studied. The experimental results show that there is a significantly wavelength-dependent. The effects of ashing temperature, heating mode, atomization temperature, recording time and matrix modifiers affecting the non-specific absorption of Lu and Yb matrices were discussed.
文摘The effects of background absorption of TmCl 3 and Tm(NO 3) 3 matrices in graphite furnace atomic absorption spectrometry(GFAAS) were inverstigated. The experiments demonstrated that the background absorption of Tm matrices is obviously wavelength dependent. The background absorption of TmCl 3 is larger than that of Tm(NO 3) 3, especially in short wavelength region. The background absorption of TmCl 3 is decreased significantly as the ashing temperature increases and that of Tm matrices is eliminated completely at about 1900 ℃. The time distribution of background signal is related to the atomization temperature and the heating mode of atomization HNO 3 can be used to reduce the background absorption of TmCl 3 matrix.
