 measur nickel biolog materi atom absorpt spectrometri atom absorpt procedur develop facilit quantit measur nickel biolog materi includ urin ribonucl acid rna serum protein sensit detect nickel atom absorpt spectromet 0 10 p insuffici permit direct measur nickel normal urin emploi dimethylglyoxim extract procedur concentr nickel prior atom absorpt spectrometri coeffici variat measur nickel urin human b- globulin 6 3 5 9 cent recoveri nickel urin averag 96 cent rang 94 97 recoveri nickel human b-globulin averag 101 cent rang 96 104 concentr nickel 24-hr collect urin 17 normal subject 1 8 ug 100 0 8 rang 0 4 3 1 urinari excret nickel 19 8 ug 24 hr 10 0 rang 7 2 37 6 concentr nickel 5 prepar ribonucl acid ultracentrifug supernat homogen rat lung 48 ug ni gm rna rang 34 64 concentr nickel 5 prepar rna ultracentrifug supernat homogen rat liver 29 ug ni gm rna rang 21 39 measur nickel perform fraction human serum protein prepar continu-flow electrophoresi cold-ethanol precipit highest concentr nickel prepar serum b-globulin 