1969 年 18 巻 5 号 p. 268-274
Emission spectrographic analysis by the AC arc powder method was examined in order to find a simple method for the determination of mercury in brine purification mud.
The volatilization rate of mercury which depends on the sample composition, could be regulated in a good level by using graphite powder as the diluent.The most suitable carrier which gives the highest sensitivity was found to be Ag2O.
From the experimental results above mentioned, a recommendable operating condition is as follows;the sample is mixed with a suitable amount of graphite powder and Ag2O, put into a carbon neck electrode, and then excited by an AC arc of 30 volts and 7 amperes for 20 seconds.The use of Hg I 2536.5Å/Ge I 2533.2Å line pair as the analytical lines is satisfactory.The concentration of Hg to which the present method is applicable is 0.05-1.5%.
This method seems to be suitable for routine analysis in a manufactory.