This　paper　reports　the　determination　of　samarium,　europium　and　gadolinium　by　Sm　and　Gd　monoxide　emission　and　Eu　atomic　emission.　The　enhancement　effect　of　other　rare　earth　elements　on　Sm,　Eu　and　Gd　emission　was　studied.　Large　amounts　of　lanthanum　(La)　were　used　as　enhancing　reagents　and　chemical　interference　inhibitors　and　the　dual　wavelength　method　was　introduced　to　eliminate　spectral　interference,　in　which　the　analytical　wavelengths　used　were　Sm　651.0　nm,　Eu　459.4　nm　and　Gd　461.6　nm　and　the　reference　wavelengths　were　Sm　651.4　nm,　Eu　459.8　nm　and　Gd　461.2　nm.　The　method　has　been　applied　to　the　assay　of　Sm,　Eu　and　Gd　in　synthetic　Sm-Eu-Gd　concentrates　with　satisfactory　results.