Laboratory, checking

A laboratory check is normally desirable to assess the amounts of organic and mineral acids present, and a check on hardness is usually necessary in any case. Hardness in water is due to dissolved salts - mainly of calcium, magnesium and iron, and occasionally of aluminum. Softening may be required if the water is extremely hard, because the salts react with the emulsifier in the soluble oil to form an insoluble scum that floats on the surface of the emulsion. The scum may not in itself be harmful, but its formation uses up some of the emulsifier and causes the emulsion to be unstable. 

Arrange for common laboratory for analyses or apply cross-laboratory checks... 

Unstable materials properly stored 4. Process laboratory checked for runaway ... 

Organoleptic Analysis. Laboratory checks must be made to test all blends and fining prior to the actual operation in the plant. Rechecks of the finished tank by organoleptic and chemical analyses after the operation is completed in the cellar are the only good way to ensure that... 

Submitted by The Miner Laboratories. Checked by Roger Adams and C. G. Gaulrke. 

In addition, the laboratory checks the moisture content of the bulk tablets. It will be interesting to compare these results to the LOD of the final blend to measure the contribution of material handling. 

Most enologists desire a malo-lactic fermentation in their premium red wines not only because of the desirable chracteristics it adds to the wine, but because it is the only way to ensure that it will not take place in the bottle. One of the standard laboratory checks made on red wines before bottling is for the absence of malic acid. The danger of a fermentation occurring in the bottle is that the wine becomes both cloudy and gassy and usually develops an off smell and flavor. 

At the optimum point corresponding to the maximum packing fraction, e1 = e11, since the porosity value at this point does not depend on whether fine or coarse particles form the mixture skeleton. The Equation (90) permit calculation of the porosity values for a mixture of fractions of any composition. A similar procedure can be used for calculating the porosity of mixtures of three or more fractions. A laboratory check of these Equations (90) confirmed good agreement between the calculation forecast and the experimental determination of porosity coefficients and wide variety of combinations of narrow filler fractions. 

When one wishes to synthesize a given compound, it is normal practice to search the literature as described above in order to find out by what methods the compound has been synthesized, or in the case of new compounds, how related compounds have been synthesized. The procedures reported in the literature are of variable reliability and are often rather incomplete. Therefore it is advisable to look in some secondary sources to see if more complete or reliable information may be found. The first such source would be Organic Syntheses. This series of publications gives complete methods for the preparation of a large number of organic compounds. Each procedure has been submitted by one laboratory, checked by another, and is supplied with a complete set of notes which should enable anyone to prepare the compound satisfactorily. Similar volumes on related subjects have appeared and are entitled Inorganic Syntheses and Biochemical Preparations. ... 

It may pay to check errata lists where errors are suspected in connection with some important point. Sometimes a doubtful figure or statement can be dealt with only by a laboratory check. 

Additional reports of the efficacy of penicillamine in RA have appeared. " The parenteral use of gold was judged efficacious and safe for chronic polyarthritis when used with frequent laboratory checks. Retikinonase a neutral proteinase, and chymostatln, a chymotrypsin... 

All standard operating procedures (SOPs), specifications, manuals, and instructions are available in the specified binder in the laboratory check with table of contents, all documents up-to-date. 

Sdentists at Oak Ridge National Laboratory checking the thyroid of a heifer to detect uptake of radioactive iodine following injection. (Credit National Archives)... 

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