Report
opened container since the seller cannot be held responsible for changes or contamination that may occur during an indefinite period after a container has been opened. Should there be a series of incidents involving one manufacturer sufficient to indicate irresponsibility or deceitfulness, or if for any other reason the user wishes to call matters connected with reagents to the attention of the committee, he should communicate with the Chairman of the committee in care of the Executive Secretary of the ACS. While the ACS does not license manufacturers to use its specifications, it can bring to bear considerable moral pressure on those who willfully misuse the ACS designation. In practice, the committee has found that producers want to learn about quality problems of which they might otherwise remain unaware. In its experience, most causes for complaint are results of human errors, rather than the manufacturer's willful attempt to deceive or defraud the customer. Only if the manufacturer is informed of such failures can he readily correct the causes. Occasionally, a complaint is based upon difficulty with a test itself, or a need for purity higher than the ACS requirements. The committee naturally is interested in learning of such cases. Xenon. We have it for you pure and ultra pure. In a variety of pressures and containers. For this year's catalog, write: Rare and Specialty Gases Dept., Airco Industrial Gases, 575 Mountain Avenue, Murray Hill, N.J. 07974.
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The Future—How You Can Help
The present work of the committee is proceeding along much the same line as in the past. Is this appropriate, or has this approach been made obsolete by the rapid march of technology? Is there a general need for reagents of a higher level of purity? There certainly are some needs, particularly in connection with acids, bases, fluxes, and solvents where impurities in these reagents can overwhelm these same impurities in the sample. In other words, the blanks are too large. Obviously, in such situations a purer reagent is needed. There is little doubt that the ACS Reagent Committee will devote increasing attention to the need for purer reagents. Areas for future effort no doubt will include reagents
Induction heating is the most effective method of forming uniform and controlled epitaxial layer? on substrates, particularly when high temperatures are required. Other advantages include:
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Circle No. 123 on Readers' Service Card Circle No. 29 on Readers' Service Card
ANALYTICAL CHEMISTRY, VOL. 42, NO. 3, MARCH 1970
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