TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The dissolving agent comprises 0.1-5 mol/L hydrochloric acid, 0.1-5 mol/L nitric acid and 0.l5 mol/L perchloric acid. The reducing agent is 1-40 wt.% % hydrazine hydrate, 1-40 wt.% sodium borohydride aqueous solution, 1-40 wt.% phenylhydrazine aqueous solution, 1-40 wt.% hydrobromic acid aqueous solution, 1-40 wt.% tea polyphenol aqueous solution, 1-40 wt.% urea aqueous solution, 1-20 wt.% sodium thiosulfate aqueous solution, 1-5 wt.% sodium hydroxide aqueous solution, 1-40 wt.% potassium hydroxide aqueous solution, 5-50 wt.% vitamin C aqueous solution, 1-40 wt.% glucose aqueous solution, 1-40 wt.% hydroiodic acid aqueous solution, 1-40 wt.% acetic acid aqueous solution and 1-40 wt.% phenol aqueous solution.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The coagulating liquid comprises 1-20 wt.% calcium chloride and 10-90 vol.% methyl alcohol aqueous solution, 1-20 wt.% calcium chloride and 10-90 vol.% ethyl alcohol aqueous solution, 1-20 wt.% calcium chloride and 10-90 vol.% alcohol aqueous solution, 1-20 wt.% calcium chloride and 10-90 vol.% glycerol aqueous solution, 1-20 wt.% calcium chloride and 10-90 vol.% glycol aqueous solution, 1-20 wt.% calcium nitrate and 10-90 vol.% methyl alcohol aqueous solution, 1-20 wt.% calcium nitrate and 10-90 vol.% ethyl alcohol aqueous solution, 1-20 wt.% calcium nitrate and 10-90 vol.% propanol aqueous solution, 1-20 wt.% calcium nitrate and 10-90 vol.% glycerol aqueous solution and 1-20 wt.% calcium nitrate and 1-90 vol.% glycol aqueous solution. The precipitating agent comprises 0.1-20 wt.% sodium carbonate and 10-90 vol.% methanol aqueous solution, 0.1-20 wt.% sodium carbonate and 10-90 vol.% ethyl alcohol aqueous solution, 0.1-20 wt.% sodium carbonate and 10-90 vol.% propanol aqueous solution, 0.1-20 wt.% sodium carbonate and 10-90 vol.% glycerol aqueous solution, 0.1-20 wt.% sodium carbonate and 10-90 vol.% glycol aqueous solution, 0.1-20 wt.% potassium carbonate and 10-90 vol.% methyl alcohol water solution, 0.1-20 wt.% potassium carbonate and 10-90 vol.% ethyl alcohol aqueous solution, 0.1-20 wt.% potassium carbonate and 10-90 wt.% propanol alcohol water aqueous solution, 0.1-20 wt.% potassium carbonate and 10-90 vol.% glycerol aqueous solution , and 0.1-20 wt.% potassium carbonate and 10-90 vol.% glycol aqueous solution.