Recommended concentration

Free ionic silver readily forms soluble complexes or insoluble materials with dissolved and suspended material present in natural waters, such as sediments and sulfide ions (44). The hardness of water is sometimes used as an indicator of its complex-forming capacity. Because of the direct relationship between the availabiUty of free silver ions and adverse environmental effects, the 1980 ambient freshwater criterion for the protection of aquatic life is expressed as a function of the hardness of the water in question. The maximum recommended concentration of total recoverable silver, in fresh water is thus given by the following expression (45) in Fg/L. 

Anhydride name CAS Registry Number Melting point or viscosity at 25°C M ol wt Recommended concentration, phr" Curing cycles ASTM deflection temperature, °C... 

Maintenance of a correct inhibitor concentration (level) is particularly important where low-level treatments, e.g. less than 100 p.p.m. are used. Such treatments are, however, usually applied (for economic and effluent reasons) in large capacity systems, and plants of this nature will usually have skilled personnel available for control purposes. In smaller closed systems, e.g. automobile engines, higher concentrations of more than approximately 0-1% are commonly used, but in these applications there is usually a good reserve of inhibitor allowed for in the recommended concentration and routine checking is of less importance. Nevertheless, since these inhibitors are often of the dangerous type, gross depletion may lead to enhanced corrosion. 

In the McCoy table of recommended concentrations of boiler salines, the guidelines for pressures from 100 to 900 psi apply to conventional field-erected boilers with moderate rates of heat transfer, say, 50,000 Btu/hr/ft2. At high rates characteristic of packaged boilers, large amounts of insoluble material cannot be managed effectively by any dispersant presently available. 

Table 12.18 (McCoy BW table 6.12) Recommended concentrations of boiler salines... 

Concentrated potassium solutions are for IV mixtures only and should never be used undiluted. Direct IV injection of potassium could result in sudden death. When potassium is given IV, it is always diluted in 500 to 1000 mL of an IV solution. The maximum recommended concentration of potassium is 80 mEq in 1000 mL of IV solution (although in acute emergency situations a higher concentration of potassium maybe required). 

Limited information regarding potential for age-related differences in susceptibility to methyl parathion in humans was reported by Dean et al. (1984). Seven children (ranging in age from 2 to 11 years) and three adults were exposed to unknown concentrations of methyl parathion sprayed illegally inside a house at a concentration of 4% (>3 times the recommended concentration for field applications). The children... 

Because of its carcinogenic potential, the EPA-recommended concentration for trichloroethylene in ambient water is zero. However, because attainment of this level may not be possible, levels that correspond to upper-bound incremental lifetime cancer risks of 10, lO , and 10 are estimated. 

Biomarkers of sepsis have been controversial. The routine use of endotoxin, procalcitonin, or other markers is not routinely recommend. Concentrations of procalcitonin in serum are usually increased in sepsis, but fail to differentiate between infection and inflammation. However, procalcitonin has a high negative predictive value and could allow for the discontinuation of antibiotics. 

The product is of satisfactory purity for use in the 4,6,8-tri-methylazulene preparation without further purification. Re-crystallization of a small sample of the 2,4,6-trimethylpyryKurri perchlorate from a seven-fold amount of hot water, containing a few drops of perchloric add and some carbon blade, gives colorless crystals, m.p. 245-247° dec. However, the recrystallization of larger amounts in this way presents some hazard and is not recommended. Concentration of filtrates should be avoided (see Note 4). 

In the case of direct in situ RT-PCR, digoxigenin-labeled 11-dUTP is added in the 4(dNTP) mix. The recommended concentration ratio of digoxigenin 11-dUTP to dTTP is 1 19 (Boehringer Mannheim). 

Where the clean agent is used for inerting and extinguishment, the higher of the recommended concentrations should be used. Concentration safety factors should be used as follows for ... 

Often pesticide wastes, which require special disposal facilities, are in a dilute form and result from rinsates from containers, spray tanks, and equipment wash water. These may originate from the small applicator or large commercial operator. Such wastes should be sprayed on an area for which they are approved or placed in a safe disposal facility. Occasionally, fairly large volumes of recommended concentration dilute mixtures resulting from livestock dipping operations, overestimating the amount needed for a spray operation, etc., must be discarded. 

IV- Dilute to 1 g/100 ml (minimum) and infuse over 1 hour/1 g dose. Severe cardiopulmonary reactions have occurred when given at greater than the recommended concentration and rate. 

A dosimeter suitable for measuring the radiation intensity at doses in the range of 10 to 8 X 1CP rads consists of a solution of 0.001 M ferrous sulfate-0.01M cupric sulfate in 0.0ION sulfuric add. If the recommended concentrations are used, the dosimeter is reproducible to 0.3% and stable after irradiation to approximately 2% per week. The dose received by the recommended dosimeter can be calculated, if read at 25°C., by converting the change in absorbance (AA) using the equation dose (rads) =... 

The medium of manufacturer s recommended concentration should be used when preparing media for process simulation tests unless other concentrations can be shown empirically to be equivalent. 

Experiment. Two levels of Dilution QC are required. The Dilution QC for dilution integrity is typically at lOx of the High QC. The Dilution QC for dilution linearity should be at a concentration above projected maximum concentration (C ). If the projected Cmix is not available, the recommended concentration would be 50x or lOOx of High QC. To test dilution integrity or linearity, the Dilution QCs need to be diluted at dilution factor (DF) of 10, 50 or 100 to bring the final concentration within the range. It may require multiple steps of dilution. This experiment only needs to be conducted once per each validation. 

Experiment 3. Matrix Factor (MF) Test Extract six blanks from six different lots. Spike appropriate and same amount of analyte and IS into the postprocessed extract and neat sample, respectively. MF is the ratio of the peak area of the analyte in extract vs. neat sample. For stable labeled IS, the response can be normalized and peak area ratio (instrument response) can be used for MF calculation. For analog IS, the matrix factor must be calculated individually for analyte and IS. The recommended concentration for MF test is at medium QC level. 

Most antibiotics have a limited stability and only remain active for 3-5 days at 37°C. Many are toxic to cells and so should only be used at the recommended concentration. 

Antibiotic Recommended concentration Gram + ve bact Gram — ve bact Yeast Fungi Moulds Mycoplasma... 

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