Chromatography Lab Report Example | Topics and Well Written Essays - 1500 words

Chromatography - Lab Report Example Unknown mixtures of dyes were also resolved into their respective components using paper chromatography. Chromatography is a separation technique that determines the components of a mixture. Drug tests of blood and urine samples as well as determining the presence of harmful substances in drinking and groundwater are the most common uses of chromatography. The solid or liquid stationary phase holds the mixture to be separated. In addition, it is the medium to which the mobile phase passes through. On the other hand, the liquid or gaseous mobile phase passes along the stationary phase and in the process carries the components of the mixture with it. In the end of the experiment, separate bands are observed, representing the different components that move along the stationary phase at different rates. The chromatogram is the pattern of separated bands produced after chromatography. Each band is characterized by its retention factor, which is the ratio of the distance between the origin line and the band of the component and the distance between the origin line and the solvent front. In paper chromatography, a specialized paper made of cellulose is used as the stationary phase. The best mobile phase for a particular separation experiment depends on which solvent system the sample components have different Rf values. Thus, measurement of Rf values of the individual sample components in a variety of solvents is necessary in deciding which solvent to use as the mobile phase. This experiment was conducted to determine, through paper chromatography, the retention factors (Rf) of the seven pure food dyes, red 3 (R3), red 40 (R40), blue 1 (B1), blue 2 (B2), yellow 5 (Y5), yellow 6 (Y6), and green 3 (G3), approved by the Food and Drug Administration (FDA) and dissolved in three different solvent systems, distilled water, 70% isopropyl alcohol, and 0.10% sodium chloride (NaCl)

The Remuneration of the Chief Executive Essay Example | Topics and Well Written Essays - 2000 words

The Remuneration of the Chief Executive - Essay Example Although target remuneration levels are aligned to the market, excellent performance by both the company and by the individual executive director is rewarded with higher bonus levels and share awards, taking potential total remuneration to the upper quartile or higher of the company’s key international competitors. Base salaries of employees are determined in a similar way to those of executive directors. The company’s approach is to ensure that target total compensation is benchmarked to the relevant market in which the individual is employed. The objective of this study is to analyze whether the CEO’s remuneration is in some way related to the performance of the firm or results from the position and power of the chief executive. Most of the studies conducted earlier consider whether CEO pay is determined by the performance of the company they manage or whether it simply relates to the influence which the CEO has over the board of directors. Several other factors such as the size of the company, number of executive directors on the board, sales growth of the company have also been considered in this study to understand the significant factor that decides the remuneration of the CEO. Some studies conducted indicate that if the CEO is also the Chairman of the company, this person has an undeniable influence on the decisions of the board. Hence the influence of the position of the executive director is also studied in this analysis. From the above analysis, it is concluded that the salary of the CEO is much higher when he is the Chairman of the company. The position and power of the CEO play a significant role in determining the salary despite the poor performance of the company. The higher the proportion of executive directors on the board, the higher is the salary of the CEO. Â