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
REE contents of water and vegetables, from two typical RE-rich background regionsand normal region in Gainan,Jiangxi Province, China, indicatethat REE contents are markedlydifferent in water and vegetables.There are a...REE contents of water and vegetables, from two typical RE-rich background regionsand normal region in Gainan,Jiangxi Province, China, indicatethat REE contents are markedlydifferent in water and vegetables.There are average 0.03 mg·L-1and 0. 11 mg·L-1 REE in water ofA and B regions. As REE contentsof vegetables for A region are different from B region, it suggeststhat there are a lot of factors controlling REE distribution betweenvegetables. Comparing with thenormal region, soluble RE contentsin water of the RE-rich backgroundregions are factors of 68 and 18than that of the normal region.REE contents of the most plantsand crops in A and B regions arehigher than that in the normal region. It is clear that REE are theindispensable elements of plantsduring their growing period. Asthere are unusually higher REEcontents of some plants in A and Bthan in the normal regions, it isconsidered to result from absorbingREE passively during the period ofplants and crops growing up.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REE contents of water and vegetables, from two typical RE-rich background regionsand normal region in Gainan,Jiangxi Province, China, indicatethat REE contents are markedlydifferent in water and vegetables.There are average 0.03 mg·L-1and 0. 11 mg·L-1 REE in water ofA and B regions. As REE contentsof vegetables for A region are different from B region, it suggeststhat there are a lot of factors controlling REE distribution betweenvegetables. Comparing with thenormal region, soluble RE contentsin water of the RE-rich backgroundregions are factors of 68 and 18than that of the normal region.REE contents of the most plantsand crops in A and B regions arehigher than that in the normal region. It is clear that REE are theindispensable elements of plantsduring their growing period. Asthere are unusually higher REEcontents of some plants in A and Bthan in the normal regions, it isconsidered to result from absorbingREE passively during the period ofplants and crops growing up.
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.
