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Where HV is the hydroxyl value; V B is the amount (ml) potassium hydroxide solution required for the titration of the blank; V acet is the amount (ml) of potassium hydroxide solution required for the titration of the acetylated sample; W acet is the weight of the sample (in grams) used for acetylation; N is the normality of the titrant; 56.1 is ...
In chemistry, a chemical test is qualitative or semi-quantitative procedure designed to prove the existence of a chemical compound or chemical group with the aid of a specific reagent. Subcategories This category has the following 3 subcategories, out of 3 total.
The optimal conditions for the high molecular weight group are high incident angles (70–90°) and short d 1 distances (1–3 mm). The optimal conditions for the low molecular weight group are the opposite, low incident angles (35–50°) and long d 1 distances (7–10 mm). These test results indicate that each group of molecules has a ...
A high voltage is applied across the anode and cathode, resulting in an ionization of the fill gas. The gas ions are accelerated towards the cathode and, upon impact on the cathode, sputter cathode material that is excited in the glow discharge to emit the radiation of the sputtered material, i.e., the element of interest.
The difference between the two peak potentials (E p), ΔE p, is of particular interest. ΔE p = E pa - E pc > 0. This difference mainly results from the effects of analyte diffusion rates. In the ideal case of a reversible 1e- couple (i.e., Nernstian), ΔE p is 57 mV and the full-width half-max of the forward scan peak is 59 mV. Typical values ...
Anne Hathaway said in a new interview with V Magazine ahead of the release of her upcoming movie “The Idea of You” that chemistry tests have come a long way since her auditioning days in the ...
The quotient 1000×v r /v i is quoted in the Leeb rebound hardness unit HLx (where x indicates the probe and impact body type: D, DC, DL, C, G, S, E) . [1] [3] While in the traditional static tests the test force is applied uniformly with increasing magnitude, dynamic testing methods apply an instantaneous load.
Anne Hathaway said in a new interview with V Magazine ahead of the release of her upcoming movie “The Idea of You” that chemistry tests have come a long way since her auditioning days in the ...