Ν a nog rade-Ten Parts per Trillion THE LABEL GUARANTEE ON NEW MALLINCKRODT NANOGRADE™SOLVENTS! New Nanograde solvents from Mallinckrodt put an end to r e d i s t i l l i n g . And t h e y ' l l give you guaranteed quality in the bargain. Petroleum Ether, Benzene, Acetone, Hexane, Acetonitrile and Isopropyl Alcohol are the first products in the Nanograde line guaranteed for pesticide residue analysis. They are also suitable for other applications requiring extremely low levels of non-volatile impurities. Each lot of Nanograde solvent is tested by GLC, using an electron attachment detector. No interfering impurity gives a GLC peak greater t h a n t h a t produced by ten nanograms of Heptachlor Epoxide per liter of solvent. The purity is stated on the label.
If you've been redistilling, switch to Nanograde solvents now. They're priced for volume use and sold by your near-by Mallinckrodt distributor. For more details, and announcements of new Nanograde products, send the coupon below.
Mallinckrodt MALLINCKRODT CHEMICAL WORKS ST. LOUIS · NEW YORK . LOS ANGELES
Mallinckrodt Chemical Works Dept. DB Second and Mallinckrodt Streets St. Louis, Missouri 63160 Send Nanograde solvent information to:
That's ten parts per trillion. Maximum. Far below government acceptability limits.
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Nanograde solvents are distilled in glass. They are packaged in gallon glass jugs before leaving the controlled production environment.
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