This view of a signal is caused by an increase in the concentration of
mercury in the vaporwhen the samplewas heated, but then Hgamount
drops down and the signal decreases. As seen in Fig. 1 for a sample of
SiO2, where only the ionic species of Hg are presented, the peak has a
unimodal shape. The same reproducible results were observed for the
majority of ND samples but several samples like UDD-Alit or UDDNanoGroup
had bimodal peak shapes. This did not affect the Hg determination
as the total area is used for calculations. The peaks for some
of the test samples are shown in Fig. 3.
However, the peak shape gives us the additional information about
Hg binding. For example, in the case of a bimodal peak, we can assume
that a part of mercury binds to the ND surface stronger than the rest,
which evaporates easily. If we continue to heat the sample, no new
peak appears, as shown in Fig. 1B. In this experiment, we heated a
RUDDM sample for 5 min and continue to measure the signal. For this
time, the sample lost more than 50% of its starting weight. For comparison,
theweight loss of the sample during the timewhen mercury evaporated
was no more than 5%. This proves once again that mercury
impurity is concentrated at the surface of ND crystals.
This view of a signal is caused by an increase in the concentration ofmercury in the vaporwhen the samplewas heated, but then Hgamountdrops down and the signal decreases. As seen in Fig. 1 for a sample ofSiO2, where only the ionic species of Hg are presented, the peak has aunimodal shape. The same reproducible results were observed for themajority of ND samples but several samples like UDD-Alit or UDDNanoGrouphad bimodal peak shapes. This did not affect the Hg determinationas the total area is used for calculations. The peaks for someof the test samples are shown in Fig. 3.However, the peak shape gives us the additional information aboutHg binding. For example, in the case of a bimodal peak, we can assumethat a part of mercury binds to the ND surface stronger than the rest,which evaporates easily. If we continue to heat the sample, no newpeak appears, as shown in Fig. 1B. In this experiment, we heated aRUDDM sample for 5 min and continue to measure the signal. For thistime, the sample lost more than 50% of its starting weight. For comparison,theweight loss of the sample during the timewhen mercury evaporatedwas no more than 5%. This proves once again that mercuryimpurity is concentrated at the surface of ND crystals.
การแปล กรุณารอสักครู่..

This view of a signal is caused by an increase in the concentration of
mercury in the vaporwhen the samplewas heated, but then Hgamount
drops down and the signal decreases. As seen in Fig. 1 for a sample of
SiO2, where only the ionic species of Hg are presented, the peak has a
unimodal shape. The same reproducible results were observed for the
majority of ND samples but several samples like UDD-Alit or UDDNanoGroup
had bimodal peak shapes. This did not affect the Hg determination
as the total area is used for calculations. The peaks for some
of the test samples are shown in Fig. 3.
However, the peak shape gives us the additional information about
Hg binding. For example, in the case of a bimodal peak, we can assume
that a part of mercury binds to the ND surface stronger than the rest,
which evaporates easily. If we continue to heat the sample, no new
peak appears, as shown in Fig. 1B. In this experiment, we heated a
RUDDM sample for 5 min and continue to measure the signal. For this
time, the sample lost more than 50% of its starting weight. For comparison,
theweight loss of the sample during the timewhen mercury evaporated
was no more than 5%. This proves once again that mercury
impurity is concentrated at the surface of ND crystals.
การแปล กรุณารอสักครู่..
