Calibration Curve Equation:   y = 984 371. 3561x + 216 064. 755 R2 = 0. 9912 Calibration Curve Equation:   y = 688 260. 8175x + 475 029. 6892  R2 = 0. 9766 The  peak  areas  of  the  acids  were  then  obtained  through  chromatograms and plotted against the concentrations  of  the standard  solutions  of  the  organic  acids  to  construct  a  calibration  curve. Finally,  the  calibration  curves  obtained  were  used  to  determine  the  concentration  of  the  organic  acids  in  samples  of  white  […]

CHEM. RES. CHINESE UNIVERSITIES China Abstract A sensitive, simple, and low-cost method based on capillary electrophoresis(CE) with electrochemical(EC) detection at a carbon fiber microdisk electrode(CFE) was developed for the determination of nicotine. The effects of detection potential, concentration, and pH value of the phosphate buffer, and injection time, as well as separation voltage, were investigated. Under the optimized conditions: a detection potential of 1. 20 […]

Research question: Does the concentration (mol DMS) of sulfur dioxide in wine rise or fall when exposed to alarm for different time periods (O, 75,150,225, 300 minutes)? Purpose: Many adults enjoy the consumption of wine but are not aware of the different preservatives and chemicals that are added to the drink. Sulfur Dioxide, which is added to many food products including wine because it acts […]

Oxygenated vs deoxygenated states of blood: One hemoglobin can carry 4 oxygen Deoxygenated hemoglobin is not bound to oxygen If a person has low oxygen level, a bluish hue will result and a low pulse oxygenation will register as a measurement of the difference between oxygenated and deoxygenated hemoglobin. *”Hemoglobin transports oxygen to cells and C02 to lungs to be exhaled. **Deoxygenated hemoglobin is concave […]

Editor’s Note: This occasional series of articles looks at the vital things in our lives and the chemistry they are made of. You are what you eat. But do you recall munching some molybdenum or snacking on selenium? Some 60 chemical elements are found in the body, but what all of them are doing there is still unknown. Roughly 96 percent of the mass of […]

Redox Titration Lab ABSTRACT: In this lab, 0. 010 M purple-colored potassium permanganate solution was standardized by redox titration with iron (II) ammonium sulfate hexahydrate (FAS). The average mass of the three flasks of FAS was 0. 483 grams. Once the concentration of the standard solution of KMnO4 (aq) was determined, it was used to determine the concentration of Fe2+ in iron pills. On average, […]

Chemistry: Strong Acid and Weak Base Titration Lab Cherno Okafor Mr. Huang SCH4U7 November 21st, 2012 Data Collection and Processing Concentration of the standard HCl solution: 0. 1 M Data Collection: | Trial 1| Trial 2| Trial 3| Final HCl Buret Reading ± 0. 05 mL | 38. 3| 45| 54. 5| Initial HCl Buret Reading ± 0. 05 mL | 29. 9| 38. 3| […]

HAD cholesterol (good) Bio-organic Chemistry Review Sheet Ill What is an alkaline? What is an alkaline? Ill. What are some common alikeness? IV. How to you make an alkaline? V. What is the mechanism of the addition of HEX across a double bond? Bio-organic Chemistry Review Sheet 3 (continued) VI. What is the mechanism of the addition offs across a double bond? The reactions of […]

Biochemistry Fats, Diet, and Heart Disease ‘Fat’ can sometime be a word that gives people the chills when they hear about it. It is one of the three main sources of calories to our diet and a major part of ones dietary requirement. There are three kinds of fat: saturated, polyunsaturated and monounsaturated. The degree of saturation is dependent on the amount of double and […]

Everything is made of particles. Particles in solid are not free to move around. Liquids and gases can. As particles move they collide with each other and bounce off in all directions. This is called random motion. In 2 substances, when mixed, particles bounce off in all directions when they collide. This mixing process is called diffusion. It’s also the movement of particles without a […]