Usp 467 Calibration Mixture #4, Restek, Each

Details:

The class 1 mixtures below reflect the requirements of usp23/nf18 effective january 1, 1995 to december 31, 1999.Mixtures do not meet the current usp guidelines, many still use these mixtures to obtain a detectable benzene peak for the direct injection methods, method i and method vcomponentsbenzene (71-43-2), 2μg/mlchloroform (67-66-3), 60μg/ml1,4-dioxane (123-91-1), 380μg/mlmethylene chloride (dichloromethane) (75-09-2), 600μg/mltrichloroethene (79-01-6), 80μg/ml