Analysis of Antioxidants using Cyclic Voltammetry - Revision history

PaulDuckworth: /* Antioxidants in Cosmetics */

2014-08-11T00:57:04Z

‎Antioxidants in Cosmetics

PaulDuckworth at 06:17, 12 June 2013

2013-06-12T06:17:16Z

PaulDuckworth: /* Antioxidants in the Food */

2013-06-12T06:11:32Z

‎Antioxidants in the Food

PaulDuckworth: /* Antioxidants in the Food Industry */

2013-06-12T06:11:21Z

‎Antioxidants in the Food Industry

PaulDuckworth: /* Antioxidants in the Cosmetics Industry */

2013-06-12T06:11:09Z

‎Antioxidants in the Cosmetics Industry

PaulDuckworth: /* Antioxidants in Medicine */

2013-06-12T06:10:29Z

‎Antioxidants in Medicine

PaulDuckworth: /* Antioxidants in the Medical Industry */

2013-06-12T06:09:24Z

‎Antioxidants in the Medical Industry

PaulDuckworth: /* Introduction */

2013-06-12T06:08:43Z

‎Introduction

PaulDuckworth: /* Antioxidants in the Cosmetics Industry */

2013-06-12T06:06:25Z

‎Antioxidants in the Cosmetics Industry

PaulDuckworth: /* Antioxidants in the Food Industry */

2013-06-12T06:05:46Z

‎Antioxidants in the Food Industry

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 == Antioxidants in Cosmetics ==
-Antioxidants are a key ingredient with claimed anti-aging effects in many skin care products. They are claimed to provide reparative benefits and to afford protection against exposure to pollution and UV radiation. Quantifying the level of antioxidants in cosmetic raw materials allows the formulator to choose the exact level of protection offered by the product.
+Antioxidants are often a key ingredient  in many skin care products. They are claimed to provide protection against exposure to pollution and UV radiation, to repair skin damage and to have anti-aging effects, Quantifying the level of antioxidants in cosmetic raw materials allows the formulator to choose adjust the level of protection offered by the product.
 Cyclic voltammetry is an affordable, robust tool for measuring the antioxidant capacity of plants, extracts, and formulations. In addition to its role in research, it is well suited for collecting quality control data and optimising extraction procedures. It is a simple way to measure and document the antioxidant capacity of a given substance. Figure 1 shows the voltammogram of a cream base with 1.0% sodium ascorbate.

← Older revision		Revision as of 06:17, 12 June 2013
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−	[[File:Cv of cosmetic cream base with sodium ascorbate.jpg\|300px\|thumb\|right\|Figure 1. CV of ~~Cream Base~~ with 1.0% sodium ascorbate.]]	+	[[File:Cv of cosmetic cream base with sodium ascorbate.jpg\|300px\|thumb\|right\|Figure 1. CV of a cream base with 1.0% sodium ascorbate.]]
	[[File:Cv of warm black tea 20uA.jpg\|300px\|thumb\|right\|Figure 2. CV of Black Tea]]		[[File:Cv of warm black tea 20uA.jpg\|300px\|thumb\|right\|Figure 2. CV of Black Tea]]

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 Cyclic voltammetry is an affordable, robust tool for measuring the antioxidant capacity of plants, extracts, and formulations. In addition to its role in research, it is well suited for collecting quality control data and optimising extraction procedures. It is a simple way to measure and document the antioxidant capacity of a given substance. Figure 1 shows the voltammogram of a cream base with 1.0% sodium ascorbate.
-== Antioxidants in the Food ==
+== Antioxidants in Food ==
 Many foodstuffs contain high levels of antioxidants. In fruit juices and plant extracts the main antioxidants are vitamin C (ascorbic acid), and an array of polyphenolic compounds. 'Staleness' of a food is often due to gradual oxidation (by air) leading to loss of the antioxidants, and monitoring of the 'total antioxidant level' in a foodstuff is often an indicator of its freshness and quality. 'Total antioxidant level' is usually quoted by referencing back to an equivalent amount of vitamin C (in aqueous samples) or vitamin E (for fat soluble antioxidants). The EChem Startup System has been used to perform cyclic voltammetry on a range of beverages. Figure 2 shows the antioxidant peaks (due to polyphenolic tannins) in the cyclic voltammogram of black tea.

@@ Line 16: / Line 16: @@
 Cyclic voltammetry is an affordable, robust tool for measuring the antioxidant capacity of plants, extracts, and formulations. In addition to its role in research, it is well suited for collecting quality control data and optimising extraction procedures. It is a simple way to measure and document the antioxidant capacity of a given substance. Figure 1 shows the voltammogram of a cream base with 1.0% sodium ascorbate.
-== Antioxidants in the Food Industry ==
+== Antioxidants in the Food ==
 Many foodstuffs contain high levels of antioxidants. In fruit juices and plant extracts the main antioxidants are vitamin C (ascorbic acid), and an array of polyphenolic compounds. 'Staleness' of a food is often due to gradual oxidation (by air) leading to loss of the antioxidants, and monitoring of the 'total antioxidant level' in a foodstuff is often an indicator of its freshness and quality. 'Total antioxidant level' is usually quoted by referencing back to an equivalent amount of vitamin C (in aqueous samples) or vitamin E (for fat soluble antioxidants). The EChem Startup System has been used to perform cyclic voltammetry on a range of beverages. Figure 2 shows the antioxidant peaks (due to polyphenolic tannins) in the cyclic voltammogram of black tea.

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 CV is a rapid technique for measuring antioxidant levels and often requires minimal sample preparation. An electrode has an applied voltage is swept between two values. The current generated by the loss of electrons from the  antioxidants leads to peaks in the current signal at given voltages. The voltage at which these peaks occur indicates the type of antioxidant, while the current peak height and area reflect the amount of antioxidant present.
-== Antioxidants in the Cosmetics Industry ==
+== Antioxidants in Cosmetics ==
 Antioxidants are a key ingredient with claimed anti-aging effects in many skin care products. They are claimed to provide reparative benefits and to afford protection against exposure to pollution and UV radiation. Quantifying the level of antioxidants in cosmetic raw materials allows the formulator to choose the exact level of protection offered by the product.

← Older revision		Revision as of 06:10, 12 June 2013
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	== Antioxidants in Medicine ==		== Antioxidants in Medicine ==

−	CV with the EChem Startup System can be used for the analysis of antioxidant levels in blood plasma, which can be used to determine the effects of diet, stress, and infection in suitable animal models.	+	CV with the EChem Startup System can be used for the analysis of antioxidant levels in blood plasma, which can be used to determine the effects of diet, stress, and infection in suitable animal models. Antioxidant levels can also be quantified in traditional medicines.

@@ Line 20: / Line 20: @@
 Many foodstuffs contain high levels of antioxidants. In fruit juices and plant extracts the main antioxidants are vitamin C (ascorbic acid), and an array of polyphenolic compounds. 'Staleness' of a food is often due to gradual oxidation (by air) leading to loss of the antioxidants, and monitoring of the 'total antioxidant level' in a foodstuff is often an indicator of its freshness and quality. 'Total antioxidant level' is usually quoted by referencing back to an equivalent amount of vitamin C (in aqueous samples) or vitamin E (for fat soluble antioxidants). The EChem Startup System has been used to perform cyclic voltammetry on a range of beverages. Figure 2 shows the antioxidant peaks (due to polyphenolic tannins) in the cyclic voltammogram of black tea.
-== Antioxidants in the Medical Industry ==
+== Antioxidants in Medicine ==
 CV with the EChem Startup System can be used for the analysis of antioxidant levels in blood plasma, which can be used to determine the effects of diet, stress, and infection in suitable animal models.

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 Cyclic voltammetry (CV) is used in evaluating antioxidants in the oil, food, diagnostic and agricultural industries.
-CV is a rapid technique for measuring antioxidant levels and often requires minimal sample preparation. An electrode has an applied voltage is swept between two values, the current generated by the loss of electrons from the  antioxidants leads to peaks in the current signal at given voltages. The voltage at which these peaks accur indicates the type of antioxidant, while the current peak height and areas reflect the amount of antioxidant present.
+CV is a rapid technique for measuring antioxidant levels and often requires minimal sample preparation. An electrode has an applied voltage is swept between two values. The current generated by the loss of electrons from the  antioxidants leads to peaks in the current signal at given voltages. The voltage at which these peaks occur indicates the type of antioxidant, while the current peak height and area reflect the amount of antioxidant present.
 == Antioxidants in the Cosmetics Industry ==