Solubility test tests

Group I. This includes the lower members of the various homologous series (4-5 atoms in a normal chain) that contain oxygen and/or nitrogen in their structures they are soluble iu water because of their low carbon content. If the compound is soluble in both water and ether, it would also be soluble in other solvents so that further solubility tests are generally unnecessary the test with sodium bicarbonate solution should, however, be performed (see Section XI,6). 

Fuels such as diesel and kerosene readily absorb hydrocarbon vapors, the total uptake and absorption rate depending on both chemical and physical factors. If a soluble test gas is introduced above a charged test oil the concentration of flammable test gas therefore decreases with time. Liquid mist and spray produced by charged liquid increase the absorption rate relative to a quiescent liquid surface. As discussed in A-5-4, absorption could lead to an underestimation of test gas MIE near the liquid surface unless the rate of test gas introduction is sufficiently high to offset the rate of removal. Table 3-8.1.2 shows solubilities of a selection of gases in a mineral-based transformer oil at ambient temperature and pressure [200]. 

The solubility test consists of dissolving l.OOOg of the specimen in 20ml of w. If the soln is not completely clear or possesses more than a very slight opalescence, the specimen does not comply with the requirement... 

Initially, the co-agents were mixed with PVDF and FMVQ separately and the mixtures were subjected to mild irradiation. Solubility tests indicated no cross-hnking during this operation. The polymeric components were then mixed in the presence of CaO/MgO in a Brabender plasticorder at a rotor speed of 60 rpm at 160°C. Subsequently, the temperature was lowered to 130°C and a 0.2% benzoyl peroxide paste was added. Mixing was continued for 10 more minutes. Cure characteristics... 

Polymer-solvent interactions and solubility testing were summarised by Staal [26]. 

Dye solubility test A colored dye soluble in only one component is added to the emulsion. If the color spreads throughout the whole emulsion, the phase in which the dye is soluble is the continuous phase. 

Well, that just about concludes our brief look at solvents. If you can t dissolve it in one of the common solvents, you ve got problems. If in doubt, try a bit first, before committing your entire sample. Use nondeuterated solvents for solubility testing if possible, as they are much cheaper. 

The visual inspection of XX vials cut open does not show any sign of skin on the cake surface and of collapsed inclusion near the bottom of the vial. The solubility test, described in directive (p) shall be satisfactory for the dried product in all vials tested. 

If your compound does not happen to dissolve in CC14, you still have a shot because deuterium atoms do not give PMR signals. This is logical, since they re not protons. The problem is that deuterated solvents are expensive, so do NOT ask for, say, D20 or CDC13, the deuterated analogs of water and chloroform, unless you re absolutely sure your compound will dissolve in them. Always use the protonic solvents — H20 or CHC13 here — for the solubility test. There are other deuterated solvents, and they may or may not be available for use. Check with your instructor. 

Aminoacid analysis and solubility tests for crosslinking revealed that XLC participated in various reactions leading to crosslinked wool [144] -... 

Solubility of test material in an aqueous or modified aqueous solution is the chief limitation on how much material may be given intravenously. 

Table 38 lists pigments which have been tested for carcinogenicity [20]. Organic pigment lakes, whose free acidic functions makes them at least partially water soluble, were tested in the form of their soluble sodium salts (Table 39) [41]. 

An also frequently occurring problem may be the low solubility of test compounds in aqueous solvents. Organic cosolvents, such as DMSO or ethanol can be used however, due to limited cell viability, final concentrations above 1 % have to be avoided. 

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