An Improved Spectrophotometric Method for the Determination of Starch in Sugar Crystal
نویسنده
چکیده
The determination of the starch in sugar crystal is not a simple problem, as it is associated with closely related carbohydrates that affect its separation. The coloration of sugar itself if not under proper adjustment would affect usually the accuracy in the later photometric examination of the starch iodine complex formed. Spectrophotometric methods conventioilally used for this purpose though are gene~;ally accepted for practical usage, yet owing to the above mentioned interferingfactors some improvement in the techniques used should be emphasized. Recent reports from literaturee indicate that the investigations of this nature are still proceeding. In this investigation emphases on factors affecting the loss of starch in the course of the determination process due to inefficiency of the absorbent i.e. kieselguhr used for inducing flocculation, hydrolysis of starch by excessive heating, methods used for the precipitation of the starch from sugar solution, solu$ilizing the starch precipitate prepared from sugar crystal, factors affecting the property of the starch iodine complex formed whether due to the absorption maxima or the effect of acid and base upon the absorption equilibria between the coloring substances and the starch in the sugar solution which in turn influence the accuracy of the determination of the starch iodine complex are all to be stressed.
منابع مشابه
Design and Evaluation and Synthesis a Starch-Capped Silver NanoParticles Sensor and Determination trace Sulfacetamide Drug in the Presence Sodium borohydride in Blood and Urine Samples with Kinetic Spectrophotometric Method
A new Kinetic Spectrophotometic method for the Determination of trace amount Sulfacetamide Drug into real samples has been described based with silver nanoparticles starch-capped sensor, by sodium borohydride. The reaction is followed spectrophotometrically by measuring the decrease in the absorbance at 347.5 nm. 1.0×10-2 molL-1 silver nanoparticles starch-capped sensor, 2.0×10-3 mol L-1 sodium...
متن کاملA simple spectrophotometric method for the determination of blood sugar by phenylhydrazine Hydrochlorlde
متن کامل
A Method Based on Ultrasound-assisted Solidification of Floating Drop Microextraction Technique for the Spectrophotometric Determination of Curcumin in Turmeric Powder
A method based on the ultrasound-assisted solidification of floating drop microextraction technique was developed for the spectrophotometric and spectrofluorimetric determination of curcumin in turmeric powder. In this work a small volume of an organic solvent was floated on the surface of an aqueous solution. After sonication the organic solvent is solidified and separated. The effect of extra...
متن کاملOptimization of Crystal Violet Adsorption by Chemically Modified Potato Starch Using Response Surface Methodology
In this research, a response surface methodology (RSM) was used to investigate the effects of independent parameters (pH, contact time, temperature, adsorbent dosage, and initial concentration of pollutant), their simultaneous interactions, and quadratic effects on crystal violet adsorption onto two starch based materials in the form of batch experiments. The characterizing results indicated th...
متن کاملUsing starch powder for the decontamination of I-131 in isolation rooms
Introduction: Various iodine isotopes are undergoing radioactive decay except Iodine-127 (I-127. Iodine I-131 is unsealed radioactive material used in nuclear medicine for both diagnostic and therapeutic procedures in Royal Hospital since 2006. In radiotoxic classification, I-131 is in group 2 element. I-131 is highly reactive element due to its volatilization nature. Currently...
متن کامل