When he reads the label, the
ACTUAL LOT ANALYSIS
tells him purity is defined TO THE DECIMAL
9560
Hydrofluoric Acid F. W . 2 0 . 0 0 8
Baker Analyzed" REAGENT ANALYSIS OF LOT HO.
JXBaker
2300 6
Assay (HF) Fluosilicic Acid (H,$iF e ) Residue after Ignition Chloride (CI) Phosphate (PO.) Sulfate (SO.) _ Sulfite(SO, ) Heavy Metals (as Pb) Iron (Fe) . . . _ „ _ . Copper (Co) . _ Nickel (Ni) Arsenic (As) . Lead (Pb) Boron (B)
,
MEETS A.C.S. SPECIFICATIONS
0.000 6 0.0001 0.000 1 0.000 1 0.00 1 0.00002 0.0000 1 0.00001 0.0000 1 0.000003 0.00001 0.000001
% % % %
J.T.BAKER CHEMICAL CO.. PHILLIPSBURG. W.J. This is the label prepared for lot' 23006 of *Baker Analyzed' Reagent Hydrofluoric Acid. Of particular importance to both the analytical chemist and to the semi-conductor technologist is control of impurities including Cu, Ni, As, Pb and B. The Actual Lot Analysis provided on the label of this *Baker Analyzed' Reagent is proof of its suitability for use in exacting analytical determinations and in etching silicon to prescribed tolerances. Every vBaker Analyzed' Reagent is labeled with on Actual Lot Analysis that defines purity to the décima I, not |ust maximum I imirs. More than 300 are labeled with an Actual Lot Assay, not merely a range assay*
ELECTRONICS Chemists T h e Chief Chemist of o n e of A m e r i c a ' s leading electronics c o m p a n i e s writes: "We use the Actual Lot Analysis to advantage where a specific low impurity level is desired—especially Fe, Cu, Ni, As, Β and heavy metals." Another Chief Chemist writes: 'When results are out of line, we use the Actual Lot Analysis to check on the possible effect of impurities." A Chief Chemist of one of the world's largest electronics c o m p a n i e s states: "The purity of the chemicals is of extreme importance. The Actual Lot Analysis enables us to analyze different performances of various materials."
Chief Chemists in major industries state these benefits
R e a g e n t s with critical impurities controlled to exceedingly low limits are essential for m a n y d e t e r m i n a t i o n s . 'Baker A n a l y z e d ' Reagents offer the highest s t a n d a r d s of purity and most informative labeling in the industry. T h e A c t u a l Lot Analysis on every 'Baker A n a l y z e d ' label defines purity to the decimal — not just m a x i m u m limits.
(actual statements in response to a recent survey)
METALS INDUSTRY Chemists Three Chief Chemists express their preference for the Actual Lot Analysis: "The Actual Lot Analysis serves to establish minimum blank evaluation or serves to eliminate entirely the necessity of running a blank. Impurity analysis is essential for spectro photometry work and preparation of synthetic spectro chemical standards" "We use the Actual Lot Analysis when analyzing for trace elements to make sure we have no interference from chemi cals used. We need the Actual Lot Analysis for making j standard solutions and testing them." "Actual Lot Analysis often shows an impurity level that is acceptable while maximum specifications may not be." Metals Industry Chemists, like chemists everywhere, find the exact labeling on 'Baker Analyzed' Reagents saves them time and work, and provides an instant check on the accu racy of their own calculations.
STEEL Chemists The Chief Chemist of a major producer of stainless steel writes: "We need the Actual Lot Analysis on reagents used in the analysis of steel for Pt Pb, Fet Sn and B. It is frequently useful in tracking trouble with blanks." A second Chief Chemist states: "The Actual Lot A nalysis is important in running low resid uals in steel and in plotting lines on the spec trograph and spectrophotometer."
J.T.Baker
"Tracking down" troublesome impurities tha interfere in determinations can be difficult and time-consuming. 'Baker Analyzed' Reagents, with their unusually high standards of purity and exact labeling, make trouble-tracking easier and faster.
J. T. Baker Chemical Co. Phillipsburg, New Jersey
Call your LSR . . . your expert in labora tory supply, when you need 'Baker Analyzed' Reagents, apparatus or glassware. Hell be glad to point out the many ways 'Baker Analyzed' Reagents can help you in your industry . . . for he knows that all chemists benefit from the exact definition of purity provided by the 'Baker Analyzed' label. Call your LSR to help you keep all your problems of laboratory supply perma nently solved. His knowl edge and experience can save you time and money.
