This was done using the method of t

This was done using the method of the Association of Vitamin Chemists as described by Kirk and Sawyer [16]. 5 g of the sample was dispersed in 50 ml of EDTA/TCA solution and homogenized. The homogenate was filtered using a filter paper and more of the extractant was used to wash the residue in the filter paper until 100 ml filtrate was obtained. A 20 ml portion of the filtrate was measured into a conical flask and 10 ml of 30 % potassium iodide solution was added to it, mixed well and then followed by four drops of 1 % starch solution. The mixture was titrated against 0.01 M CuSO4 solution until a blue-black colour appeared. A reagent blank was also titrated using 20 ml of distilled water. The vitamin C content was calculated based on the relationship that 1 ml CuSO4 = 0.88 mg vitamin C. Therefore,

ผลลัพธ์ (แอฟริกา) 1:

Dit is gedoen met behulp van die metode van die Vereniging van Vitamien Chemici soos beskryf deur Kirk en Sawyer [16]. 5 g van die monster versprei in 50 ml van EDTA / TCA oplossing en gehomogeniseerd. Die homogenate is gefiltreer deur 'n filter papier en meer van die extractant is gebruik om die oorskot te was in die filtreerpapier tot 100 ml filtraat verkry. A 20 ml gedeelte van die filtraat was gemeet in 'n koniese fles en 10 ml van 30% kaliumjodied oplossing gevoeg word, gemeng goed en dan gevolg deur vier druppels 1% styseloplossing. Die mengsel is getitreer word teen 0,01 M CuSO4 oplossing tot 'n blou-swart kleur verskyn. 'N reagens leeg is ook getitreer met behulp van 20 ml gedistilleerde water. Die vitamien C-inhoud is bereken gebaseer op die verhouding wat 1 ml CuSO4 = 0.88 mg vitamien C. Daarom ,.