Trace Element Analysis: How to be sure that those traces are really in the sample... and not in the acid. "... in each step of trace analy sis the risk of contaminating the sample is real."*
same stringent specifications previously discussed for this grade.
J I Baker—the company that sells more laboratory acids for all uses than anyone else—has several acid product lines spe cifically designed for trace analysis. These can assure that you're not unknowingly adding contaminants and that you're actually measuring your sample... and not the contami nants in your reagents.
A note about Baker acid containers Baker offers a wide choice of safe and appropriate-to-the product containers. For example, our acids are always in clear glass, never brown. (Brown bot tles leach impurities into the acid and hide discoloration and particulate matter.) Clear glass bottles with protective plastic coating are also available.
ULTREX® Acids These acids represent the ultimate in purity and product definition commerically avail able... JT Baker is the world's largest supplier of such ultrahigh purity acids. For the lowest blanks, for maximum product definition (actual lot analysis on
For more information Check with your local Baker distributor (there are 120 stocking locations) or write or call J Τ Baker, Phillipsburg, New Jersey 08865, phone 201 /8592151 or use coupon below.
In the final analysis... the professional chooses JJ. Baker
JTBaker ICHEAAICMS JT. Baker Chemical Company Phillipsburg, New Jersey 08865 each certificate), for assurance that your work will not be compromised or jeopardized by impurities or uncertain ties, no other acids can even begin to match ULTREX acids.
and, as with all Baker acids intended for tr#ce analysis, only your sample is an "unknown." Currently available: acetic, hydrochloric, hydrofluoric, nitric, perchloric, and sulfuric acids.
'Baker Analyzed ® Reagent Acids (BAR) These acids—and all the other acids discussed here—are the only ones commercially available with the actual lot analysis on every container label. More than that: 'Baker Analyzed' Reagent acids are routinely subjected to more tests than required to meet ACS purity standards. BAR acids are ideal for demanding trace analysis
Baker Specialty Acids • Sulfuric acid for the Babcock Milk Test (meets Food Chemical Codex specifications). • Low-mercury acids: with mercury controlled to less than 5 ppb, they are especially suitable for mercury determinations. Available: sulfuric, perchloric, and nitric acids. Note that these specialty acids are also 'Baker Analyzed' Reagents and meet the
* "Tracing the Elements," A.J. Barnard, Jr. and R.W. Dudley, Industrial Research, March 1973
JT. Baker Chemical Co. Phillipsburg, N.J. 08865
201/859-2151
Γ m interested in learning more about your acids for trace analysis: D ULTREX"' Ultrapure acids D Baker Analyzed'* Reagent acids D Sulfuric acid for the Babcock Milk Test D Low-mercury acids. Name Title Department Organization Address Zip
Telephone-
