The isotope effects of HOCH_2SO_3Na(HMSNa) derivatization and cysteamine were preliminary studied by compound-specific isotope analysis(CSIA). The feasibility for the determination of isotopic composition of atmospheric formaldehyde was discussed.

• 利用单体化合物稳定同位素(CSIA)技术研究了甲醛合次硫酸氢钠(HMSNa)与半胱胺衍生化过程的同位素效应,探讨了半胱胺衍生化法测定大气甲醛碳同位素的可行性。