The conditions for sample disposition, reduction distillation and absorption spectrum were al - so studied.
探讨了样品处理，还原、蒸馏、吸收光谱等条件。
Veratryl alcohol was synthesized through the reduction of sodium borohydride from veratraldehyde with isopropanol as solvent, followed by solvent extraction and distillation under reduced pressure.
以藜芦醛为主要原料、异丙醇为溶剂，经硼氢化钠还原、溶剂萃取、减压精馏得到产物藜芦醇。
Method: Sulfur dioxide released from wine by distillation was absorbed with formaldehyde absorption solution, and then determination was conducted by reduction photometry.
方法：用甲醛吸收液吸收经蒸馏释放出的二氧化硫，再用还原光度法测定。
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