title: Stability of barium sulfate turbidity standards.
abstract: McFarland barium sulfate standards prepared in 1952 were compared spectrophotometrically with freshly and identically prepared standards; the results were nearly identical.
mesh_terms: D001466:Barium Sulfate / Q000592:standards*; D004355:Drug Stability; D008826:Microbial Sensitivity Tests; D013053:Spectrophotometry
chemical_list: D001466:Barium Sulfate