[Objective] The research aimed to establish a method for the determination of available sulfur in soil. [Method]The concentration of available sulfur in soil was determined by continuum-source atomic absorption spectrometry based on the absorption of CS diatomic molecule formed in fuel-rich air and ethyne flame. The instrumental conditions were optimized. [Result] The detection limit of sulfur was 3. 97 mg / L,and the limit of quantification was 14. 8 mg / L in CS 258. 056 nm. CS molecular absorption has a ...