“…A number of articles have discussed errors in analysis, precision, accuracy, and laboratory comparisons (1,5,71,109,115,126,132,137,164,166,169,176,180). Statistical applications have been utilized in some analytical chemistry articles (16,47,68,100,104,131,149,150,159,167,172,174), papers dealings with spectrographic methods (23,81,155), infrared analysis (59) and x-ray analysis (145,182), chromatography (87, 94), radiochemical separations (19), organic analysis (17,18), and biochemical and biological assavs (54,77,116).…”