What is methoxyl content?
Methoxyl content: The methoxyl content was determined by saponification of extracted pectin and titrating the liberated carboxyl group against standardized 0.1N NaOH solution using phenol red as indicator to faint pink end point.
How is methoxyl content calculated?
The following equation was used to calculate the methoxyl content: Methoxyl content=meq. of NaOH x 31 x 100 Weight of sample Where: Meq of NaOH=normality of NaOH x titre figure 31=formula weight of methoxyl group.
What is pectin in?
Pectin is a complex starch derived from plants. It’s used to gel foods like fruit preserves – jams and jellies – and gummy candy. While there are vegetables that are high in pectin, most pectin sold in grocery stores comes from fruit like citrus peel, and for this reason, it’s sometimes labeled as fruit pectin.
How is low methoxyl pectin made?
Low Methoxyl Pectin (e440i) is extracted from the peels of citrus fruit. Pectin consists of a complex set of polysaccharides that are present in most primary cell walls of plants. The main use for pectin is as a gelling agent, thickening agent and stabilizer in food.
What is methoxyl content in pectin?
The maximum pH at which high-solids pectin gels can form, decreases with decreasing methoxyl content. It is about 3.5 for purified pectins containing 10–11% methoxyl and about 2.9 for pectins containing around 5% methoxly, providing alkali or, possibly, acid is used as the catalyst.
What is Anhydrouronic acid?
The content of anhydrouronic acid (AUA) indicates the purity of the extracted pectin with a recommended value of not less than 65% for pectin used as food additives or for pharmaceutical purpose [2, 29]. This requirement has limited the potential sources of food and pharmaceutical pectins.
What is the difference between high-methoxyl pectin and low methoxyl pectin?
High-methoxyl pectin is the form of pectin traditionally used for canning applications. It requires high amounts of sugar to gel and is very sensitive to acidity. Low-methoxyl pectin has been used in the food industry to create low-sugar jams because it does not require high sugar levels to gel.
What is the difference between pectin and pectic acid?
Pectin is a neutral methoxy ester of pectic acid, and contains 11.76 per cent methyl alcohol; pectinic acids are intermediate between pectin and pectic acid, simple carboxyl groups replacing those esterified with methyl alcohol.
What is high-methoxyl pectin used for?
Pectin has been used for decades to lend adequate setting properties to jellies and marmalades, either by making the food products using fruits such as apples that contain high-quality pectin or adding such fruits to recipes.
What is low methoxyl pectin made of?
citrus fruit
Low Methoxyl Pectin (e440i) is extracted from the peels of citrus fruit. Pectin consists of a complex set of polysaccharides that are present in most primary cell walls of plants. The main use for pectin is as a gelling agent, thickening agent and stabilizer in food.
What is pectin e440?
E440b: Amidated pectin. Origin: Pectin is a natural acid polysaccharide present in nearly all fruits, especially apples, quinces and oranges. It is commercially produced from apple pulp and orange peels.
How much pectin is in a banana?
Pectin content of fully ripe bananas has been reported to range between 0.5 to 1.28% (Baker, 2006), which is in agreement with pectin yield at ripening stages 5 and 7 of this study.
Is pectin a sugar?
Pectin is a unique fiber found in fruits and vegetables. It’s a soluble fiber known as a polysaccharide, which is a long chain of indigestible sugars. When heated in the presence of liquid, pectin expands and turns into a gel, making it a great thickener for jams and jellies ( 1 ).
What is low methoxyl pectin used for?
Low-methoxyl pectin can be used as a gelling agent, thickening agent and stabilizer. Low-methoxyl pectin can be used as a fat substitute in baked goods and to stabilize acidic protein drinks such as drinking yogurt.
What is high methoxyl pectin HMP?
Methoxyl content defined as the amount of methanol that containedin the pectin. Pectin is categorized as high methoxyl pectin HMP if it has a value methoxyl content equal to 7 or more.
What is the methoxyl content of pectin in microwave?
The highest methoxyl content was pectin with treatment microwave power of 800 W for 7 minutes, while the lowest methoxyl content was obtained from pectin with treatment microwave power of 600 W for 3 minutes. The range of methoxyl content from this pectin was 4.07-6.43 which was under 7.
How does microwave power affect methoxyl content?
The graph showed that the methoxyl content will become higher with increasing microwave power and the length of extraction time. Figure 13. The relationship between microwave power and extraction time to methoxyl content.
What is methyloxidanyl?
More… Methyloxidanyl is an organic radical derived from methanol. It derives from a methanol. CH3-O (.) The data from CAS Common Chemistry is provided under a CC-BY-NC 4.0 license, unless otherwise stated.