title: Spectrophotometric determination of pyrantel tartrate in swine feeds by method of standard additions: collaborative study.
abstract: The spectrophotometric method for pyrantel tartrate in swine feeds was collaboratively studied. Twenty-seven laboratories assayed feeds containing 0.0103, 0.0965, and 0.7902% pyrantel tartrate. Repeatability (sigmao) and reproducibility (sigmax) standard deviations were: sigmao = 0.00068%, sigmax = 0.00105% (10% of grand mean) for 0.0103% pyrantel tartrate level; sigmao - 0.0065%, sigmax = 0.0090% (10% of grand mean) for 0.0965% pyrantel tartrate level; and sigmao = 0.0415%, sigmax = 0.0743% (10% of grand mean) for 0.7902% pyrantel tartrate level. The mean theoretical recovery values for feeds containing 0.0103, 0.0965, and 0.7902% were 100, 97, and 96%, respectively. The method was adopted as official first action for feeds or concentrates containing 0.0106-0.8811% pyrantel tartrate.
mesh_terms: D000821:Animal Feed / Q000032:analysis*; D000818:Animals; D011715:Pyrantel / Q000031:analogs & derivatives*; D011717:Pyrantel Tartrate / Q000032:analysis*; D013053:Spectrophotometry; D013552:Swine
chemical_list: D011715:Pyrantel; D011717:Pyrantel Tartrate