What is Ilkovic equation explain its significance?
Ilkovic equation is a relation used in polarography relating the diffusion current (id) and the concentration of the depolarizer (c), which is the substance reduced or oxidized at the dropping mercury electrode. The Ilkovic equation has the form. id = k n D1/3m2/3t1/6c.
What is DME in analysis?
The dropping mercury electrode (DME) is a working electrode made of mercury and used in polarography. Experiments run with mercury electrodes are referred to as forms of polarography even if the experiments are identical or very similar to a corresponding voltammetry experiment which uses solid working electrodes.
What is theory of polarography?
Theory of operation The simple principle of polarography is the study of solutions or of electrode processes by means of electrolysis with two electrodes, one polarizable and one unpolarizable, the former formed by mercury regularly dropping from a capillary tube.
What is Ilkovic equation state its application?
The application of the Ilkovic equation to quantitative analysis was shown to be inadvisable unless it is definitely established that the experimental conditions are well within the range for insuring diffusion control. A logarithmic relation between critical drop-time and suppresser concentration was found.
What do you mean by Polarogram?
: a method of qualitative or quantitative analysis based on current-voltage curves obtained during electrolysis of a solution with a steadily increasing electromotive force. Other Words from polarography.
What is the objective of polarography?
Polarography is an instrumental method of chemical analysis used for qualitative and quantitative determinations of reducible or oxidizable substances. Heyrovský’s instrument measures the current that flows when a predetermined potential is applied to two electrodes immersed in the solution to be analyzed.
Why mercury is used in DME?
The pool of mercury acts as a counter electrode, i.e., anode if DME is the cathode or cathode if DME is the anode. The counter electrode is a non-polarisable electrode. To the analyte solution, an electrolyte like KCl is added i.e., 50-100 times of sample concentration.
What are the uses of polarography?
Polarography has been used extensively to determine trace metals in pharmaceutical products and to estimate drugs that contain metals as a constituent. The metals examined include antimony, arsenic, cadmium, copper, iron, lead, magnesium, mercury, vanadium and zinc.
How to find the equation of a line?
How to Find the Equation of a Line How to Find the Equation of a Line – Method 1 Calculating the Equation with One Point and the Slope 1 Plug the slope in for m in the formula y-y1 = m(x-x1). 2 Replace x1 and y1 with the coordinates of the point. 3 Solve the formula for y to get the final slope-intercept formula. See More….
What is the general equation of a line in two variables?
The general equation of a line in two variables of the first degree is represented as Ax + By +C = 0, A, B ≠ 0 where A, B and C are constants which belong to real numbers. When we represent the equation geometrically, we always get a straight line.
What are the constants of a straight line equation?
A, B ≠ 0 where A, B and C are constants which belong to real numbers. When we represent the equation geometrically, we always get a straight line. Below is a representation of straight-line formulas in different forms:
How to write the equation of a line with a slope?
Step 1: Substitute m = – , x = –3 and y = 1 into the equation y = mx+ c to obtain the value of c. This will show you how to write an equation of a line that has a given slope and passes through a given point.