SOLUBILITY TESTS Clause Samples

SOLUBILITY TESTS. To determine the functional group, it is recommended to start with solubility test and then conduct functional group classification tests. The solubility measurements are done at room temperature with 1-2 drops of liquid or 5 mg of a solid (finely crushed), and 1 mL of solvent. Place the appropriate amount of either solid or liquid unknown in a small test tube. Shake the tube and/or stir with a glass stirring rod. A soluble unknown will form a homogeneous solution with water, while an insoluble liquid will remain as a separate phase. The results from the solubility tests can significantly help in determining which classification tests should then be performed, or at least narrow down the list. The solubility tests are summarized in the flow charts below.
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SOLUBILITY TESTS. Solubility tests were carried out by saturating NADES with an excess of the tested compound in a bottle with a cap, stirring at 40 oC for 2 h and leaving to rest for 3 h for precipitation (centrifuging 20 min for DNA and gluten after dissolving for 2h). Triplicate samples of the resulting solution were diluted with water. The diluted solutions were analyzed with HPLC-UV at wavelength of 360 nm for rutin, 370 nm for quercetin, 272 nm for cinnamic acid, 517 nm for carthamin, 472 nm for 1,8-dihydroxyanthaquinone, and quantified with a UV/Vis spectrophotometer at 217 nm for ginkgolide B, 228 nm for taxol, 260 nm for DNA, and 595 nm for gluten with Bradford method. Solubility of starch was performed as follows: a known amount of starch was placed in a glass vial with a cap and 5 mL of NADES were added. The vial was vortexed, then loosely capped, placed in a microwave oven and repeatedly heated with 5-10 s pulses at full power till the liquid boiled. Between pulses, the vial was removed, and 1/10 of the original amount of the sample was added, vortexed and replaced in the oven if fully soluble. If not soluble, the sample amount was reduced and the above steps were repeated till a cloudy solution became clear when boiled (▇▇▇▇▇▇▇▇▇ et al., 2002).
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Related to SOLUBILITY TESTS

  • Stability Testing Patheon will conduct stability testing on the Products in accordance with the protocols set out in the Specifications for the separate fees and during the time periods set out in Schedule C. Patheon will not make any changes to these testing protocols without prior written approval from Client. If a confirmed stability test failure occurs, Patheon will notify Client within [***], after which Patheon and Client will jointly determine the proceedings and methods to be undertaken to investigate the cause of the failure, including which party will bear the cost of the investigation. Patheon will not be liable for these costs unless it has failed to perform the Manufacturing Services in accordance with the Specifications and cGMPs. Patheon will give Client all stability test data and results at Client’s request.

  • Laboratory Testing All laboratories selected by UPS Freight for analyzing Controlled Substances Testing will be HHS certified.

  • Performance Tests Contractor shall perform Performance Tests in accordance with Section 11.2 of the Agreement and Attachment S.

  • Substance Abuse Testing The Parties agree that it is in the best interest of all concerned to promote a safe working environment. The Union has no objection to pre-employment substance abuse testing when required by the Employer and further, the Union has no objection to voluntary substance abuse testing to qualify for employment on projects when required by a project owner. The cost and scheduling of such testing shall be paid for and arranged by the Employer. The Union agrees to reimburse the Employer for any failed pre-access Alcohol and Drug test costs.

  • Test The outer surface of the lamp lenses shall be subjected once or more than once to the action of the sand jet produced as described above. The jet shall be sprayed almost perpendicular to the surface to be tested. The deterioration shall be checked by means of one or more samples of glass placed as a reference near the lenses to be tested. The mixture shall be sprayed until the variation in the diffusion of light on the sample or samples measured by the method described in Appendix 2, is such that: Δ d = (T5 - T4) / T2 ≤ 0.0250 ± 0.0025 Several reference samples may be used to check that the whole surface to be tested has deteriorated homogeneously.