摘要
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.
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.
