Equilibrium Moisture Sorption Isotherms of Aspirin

نویسندگان

چکیده

Equilibrium Moisture sorption isotherms are very important in drying and storage analysis. Experimental moisture equilibrium data (adsorption desorption) of Aspirin were determined using the static method saturated salt solutions that by exposing material to different conditions temperatures water activities. Three (25, 30, 40Cº) activities range (6.3- 83.6%) used. The results showed content increased with increase activity at any temperature decreased constant activity. increases increasing when was kept constant. isotherm curves type II according Brunauer`s classification. hysteresis effect not distinctly expressed only for values 25ºC. experimental fitted two models (GAB Henderson).The average relative deviation between calculated obtained select best model. GAB Henderson models, obtaining 3.54 1.42 % coefficient regression 0.98 0.977 respectively. model found be fit out predict behavior Aspirin.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Experimental Determination of Moisture Sorption Isotherms of Okro Fruit

The sorption isotherm ( desorption and adsorption ) of okro fruit was determined at three temperatures of 300C,400C and 500C within the range of 1090% Relative humidity (RH). Thymol solution was placed inside the desiccators to prevent microbial growth, particularly at the relative humidity above 65%. Gravimetric method was used for the sorption isotherm where the reading and recording was take...

متن کامل

Moisture Sorption Isotherms and Isosteric Heat Determination in Chilean Papaya

The moisture sorption isotherms of Chilean papaya were determined at 5, 20, and 45 oC, over a relative humidity range of 10-95%. The GAB, BET, Oswin, Halsey, Henderson, Smith, Caurie and Iglesias-Chirife models were applied to the sorption experimental data. The goodness of fit of the mathematical models was statistically evaluated by means of the determination coefficient, mean relative percen...

متن کامل

estimation of moisture sorption isotherms for thompson seedless raisins

moisture sorption isotherms are useful in food dehydration, storage and packaging. because of the complex food composition, experimental measurements are necessary for prediction of the isotherms. moisture sorption isotherms of thompson seedless raisins were determined at 30, 40, 50, 60, 70 and 80?c, using the standard static gravimetric method developed by the european cooperation project cost...

متن کامل

Moisture Desorption Isotherms and Isosteric Heat of Sorption Characteristics of Malting Barley (hordeum Distichum L.)

 The equilibrium moisture content of malting barley grains (cv. Scarlett) was determined by gravimetric-static method in the range 20-50°C using saturated salt solutions (LiCl, MgCl2.6H2O, K2CO3, NaBr, NaNO2, KI, NaNO3, NaCl, (NH4)2SO4) to provide water activities for each temperature between 0.11 and 0.813. Desorption isotherms were obtained at 20, 30, 40, and 50°C. All the sorption curves w...

متن کامل

Water sorption isotherms of globe artichoke leaves

One third of the artichoke production is used in industrial processes, where up to 70% 85% of the initial raw material is transformed into solid wastes. For an adequate management of these wastes, it is necessary to know their water sorption properties, because physical, chemical and biological changes which occur during their storage depend on water-solid interactions. The objectives of this w...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Ma?allat? al-handasat?

سال: 2023

ISSN: ['1726-4073', '2520-3339']

DOI: https://doi.org/10.31026/j.eng.2013.04.03