An　enzyme-assisted　extraction　used　to　extract　all　species　of　selenium　in　rice　sample　and　a　sensitive　analytical　method　for　the　determination　of　ultratrace　Se(VI),　Se(IV),　SeCys(2)　(selenocystine)　and　SeMet　(selenomethionine)　with　capillary　electrophoresis-inductively　coupled　plasma　mass　spectrometry　were　firstly　described　in　this　study.　The　extraction　method　is　simple,　effective　and　can　be　used　to　extract　trace　selenium　compounds　in　rice　with　high　extraction　efficiency　and　no　altering　its　species.　The　analytical　method　has　a　detection　limit　of　0.1-0.9ngSe/mL,　and　can　be　used　to　determine　trace　Se(VI),　Se(IV),　SeCys(2)　and　SeMet　in　rice　directly　without　any　derivatization　and　pre-concentration.　With　the　help　of　above　methods,　we　have　successfully　determined　Se(VI),　Se(IV),　SeCys(2)　and　SeMet　in　selenium-enriched　rice　within　18min　with　a　recovery　of　90-103%　and　a　RSD　(relative　standard　deviation,　n=6)　of　3-7%.　Our　results　indicated　that　selenium-enriched　rice　contained　only　one　species　of　selenium,　SeMet,　and　its　concentration　is　in　range　of　0.136-0.143　mu　gSe/g　dried　weight.　The　proposed　method　providing　a　realistic　approach　for　the　nutritional　and　toxical　evaluation　of　different　selenium　compounds　in　nutritional　supplements.　(C)　2011　Elsevier　B.V.　All　rights　reserved.