dissolution system
1.Methods The samples were digested by clos ed- vessel microwave HNO 3+H 2O 2 dissolution system and directly tested by ICP -MS for the contents of La,Ce,Pr,Nd,Sm,Eu,Gd,Tb,Dy,Ho,Er,Tm,Yb and Lu in normal fetal kidney and cerebella.
2.The results indicated thatthe higher concentration of the dope and the less content of H2O would result in the better spinnability. And higher concentration of the dope had good spinnability whether the dissolution system containing minim EDTA or not. Pure EtOH and LiBr/EtOH (40/60, w/w) were used as solvent, to which minim EDTA was added.
3.MethodsThe samples were digested by closed-vessel microwave HNO 3+H 2O 2 dissolution system. The solution was directly analyzed by ICP-MS for the determination of La Ce Pr Nd Sm Eu Gd Tb Dy Ho Er Tm Yb Lu in human lung and kidney with rhenium internal calibration. ResultsThe method provided excellent sensitivity and accuracy.
4.The anthors found that there was trace lattice gold in the solution of pyrite dissolved in HNO3, and discussed the complextiy of redox reaction in dissolution system. The reason of insufficiency of lattice gold in ionic state was given. By using the EPR spectrum analysis, a fine texture spectral line with g(factor) = 2. 00±0. 001 was obtained.
6.The dissolution rate of silver in NH_4~+-H_2O_2 system was determined by use of a rotating disc method.
7.The results of research on dissolution state of VDF/CTFE copolymer in one samedissolution system show that their solubility are different.
9.The dissolution loss of metallic aluminium in nNaF·AlF_3- Al_2O_3-MgF_2 -CaF_2 system melts was investideted the using differentical-weght method with determining the residual quantity of aluminiumin gaseous phase. Thus a mathematical model describing the aiumin-ium loss in the melts is developed through orthogonal regressiondesign.
10.ratio can indicate dolomization or dissolution ofcalcite, and is related to the secondary porosity. Positive shift of δ18O and high rca/rmg ratio are indicative of existence ofclosed system and enhanced water-rock interaction.
