Eko Hari Purnomo, Uray Ulfah Nabilah, Azis Boing Sitanggang
{"title":"商品低甲氧基果胶粘度和临界浓度的测定","authors":"Eko Hari Purnomo, Uray Ulfah Nabilah, Azis Boing Sitanggang","doi":"10.1515/ijfe-2023-0058","DOIUrl":null,"url":null,"abstract":"Abstract Determining viscosity and critical concentrations is essential for industrial application of pectin solution. Critical concentration can be determined rheologically based on zero shear viscosity , apparent viscosity, specific viscosity, and consistency index of dilute polymer solution. Direct experimental comparison of the aforementioned methods for critical concentration determination is still lacking. Therefore, this study aims to experimentally compare different viscosity methods to determine critical concentration of three different pectin solutions (sun flower, citrus, and apple). The three pectin sources at concentrations of 0.1–3.0 % (w/v) showed Newtonian to shear thinning behavior. The critical concentration ranges of pectin, from the lowest to highest, was sunflower (0.6792−0.9589 % (w/v)), citrus (0.7172−1.0347 % (w/v)), and apple (0.7645−1.1233 % (w/v)). Critical concentration determined based on consistency index was relatively close to the result obtained from zero shear viscosity. Whereas critical concentrations of the pectin solutions determined from specific viscosity and apparent viscosity were significantly different from critical concentration determined from zero shear viscosity.","PeriodicalId":13976,"journal":{"name":"International Journal of Food Engineering","volume":"37 1","pages":"0"},"PeriodicalIF":1.6000,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Determination of viscosity and critical concentrations of commercial low methoxyl pectin\",\"authors\":\"Eko Hari Purnomo, Uray Ulfah Nabilah, Azis Boing Sitanggang\",\"doi\":\"10.1515/ijfe-2023-0058\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Abstract Determining viscosity and critical concentrations is essential for industrial application of pectin solution. Critical concentration can be determined rheologically based on zero shear viscosity , apparent viscosity, specific viscosity, and consistency index of dilute polymer solution. Direct experimental comparison of the aforementioned methods for critical concentration determination is still lacking. Therefore, this study aims to experimentally compare different viscosity methods to determine critical concentration of three different pectin solutions (sun flower, citrus, and apple). The three pectin sources at concentrations of 0.1–3.0 % (w/v) showed Newtonian to shear thinning behavior. The critical concentration ranges of pectin, from the lowest to highest, was sunflower (0.6792−0.9589 % (w/v)), citrus (0.7172−1.0347 % (w/v)), and apple (0.7645−1.1233 % (w/v)). Critical concentration determined based on consistency index was relatively close to the result obtained from zero shear viscosity. Whereas critical concentrations of the pectin solutions determined from specific viscosity and apparent viscosity were significantly different from critical concentration determined from zero shear viscosity.\",\"PeriodicalId\":13976,\"journal\":{\"name\":\"International Journal of Food Engineering\",\"volume\":\"37 1\",\"pages\":\"0\"},\"PeriodicalIF\":1.6000,\"publicationDate\":\"2023-09-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Journal of Food Engineering\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1515/ijfe-2023-0058\",\"RegionNum\":4,\"RegionCategory\":\"农林科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Food Engineering","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1515/ijfe-2023-0058","RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Determination of viscosity and critical concentrations of commercial low methoxyl pectin
Abstract Determining viscosity and critical concentrations is essential for industrial application of pectin solution. Critical concentration can be determined rheologically based on zero shear viscosity , apparent viscosity, specific viscosity, and consistency index of dilute polymer solution. Direct experimental comparison of the aforementioned methods for critical concentration determination is still lacking. Therefore, this study aims to experimentally compare different viscosity methods to determine critical concentration of three different pectin solutions (sun flower, citrus, and apple). The three pectin sources at concentrations of 0.1–3.0 % (w/v) showed Newtonian to shear thinning behavior. The critical concentration ranges of pectin, from the lowest to highest, was sunflower (0.6792−0.9589 % (w/v)), citrus (0.7172−1.0347 % (w/v)), and apple (0.7645−1.1233 % (w/v)). Critical concentration determined based on consistency index was relatively close to the result obtained from zero shear viscosity. Whereas critical concentrations of the pectin solutions determined from specific viscosity and apparent viscosity were significantly different from critical concentration determined from zero shear viscosity.
期刊介绍:
International Journal of Food Engineering is devoted to engineering disciplines related to processing foods. The areas of interest include heat, mass transfer and fluid flow in food processing; food microstructure development and characterization; application of artificial intelligence in food engineering research and in industry; food biotechnology; and mathematical modeling and software development for food processing purposes. Authors and editors come from top engineering programs around the world: the U.S., Canada, the U.K., and Western Europe, but also South America, Asia, Africa, and the Middle East.