Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Physico-chemical Properties and Mineral Content of Selected Tropical Fruits in Bangladesh

R. Ara
Department of Environmental Sciences, Jahangirnagar University, Savar, Dhaka-1342, Bangladesh.

S. Jahan
Institute of Food Science & Technology, Bangladesh Council of Scientific and Industrial Research, Dhanmondi, Dhaka- 1205, Bangladesh.

A. T. M. Abdullah
Institute of Food Science & Technology, Bangladesh Council of Scientific and Industrial Research, Dhanmondi, Dhaka- 1205, Bangladesh.

A. N. M. Fakhruddin
Department of Environmental Sciences, Jahangirnagar University, Savar, Dhaka-1342, Bangladesh.

B. K. Saha
Institute of Food Science & Technology, Bangladesh Council of Scientific and Industrial Research, Dhanmondi, Dhaka- 1205, Bangladesh.

Abstract/ Executive Summary:

Physico-chemical properties and mineral contents of tropical fruits available at local market in Dhaka city were evaluated as fruits are the essential part of human diet to supply required micronutrient. Among the analyzed fruits, maximum and minimum amount of moisture was found in java apple (93.26±1.77%) and indian plum (66.86±1.81%) respectively. Mango contains highest amount of total soluble solids (15.20±0.81%) and total sugar (4.71±0.08%). Highest and lowest amount of vitamin C was found in guava (212.82±6.92 mg/100g) and java apple (10±1.77 mg/100g) respectively. Approximate energy value was found highest in indian plum (128.1±5.51kcal/100g) and lowest in green palmyra palm (27.7±2.64 kcal/100g). Indian plum (139.32±9.53mg/100g) and mango (34.03±6.81mg/100g) contain highest and lowest amount of sodium whereas rose apple (75.15±0.02mg/100g) and mango (10.23±1.94mg/100g) contain highest and lowest amount of potassium respectively. Heavy metals (As, Cd, Pb and Hg) were not detected in analyzed tropical fruits. This study suggests that the tropical fruits are enriched in micronutrients.

Keywords: Tropical fruits; Physico-chemical properties; Vitamin C; Mineral content; Heavy metals

Location: Fruit Technology Research Section at Institute of Food Science & Technology (IFST), (BCSIR), Dhaka

Start Date:

End Date:

Program Area: Socio-economic and Policy

Non-commodity: Performance

Objectives:

The present study has conducted to address of physico-chemical properties, minerals and heavy metal contents in selected tropical fruits (e.g. guava, pomelo, karanda, mango, java apple, rose apple, indian plum, green palmyra palm and jujube) of Bangladesh collected from different local market of Dhaka city, those the people of Bangladesh usually take in their daily life.

Methodology:

Experiments were carried out in Fruit Technology Research Section at Institute of Food Science & Technology (IFST),(BCSIR), Dhaka. The same fruit samples were collected from three different local markets in Dhaka city. Collected samples were fresh, matured, well shaped and free from insect’s bites and other organoleptic deterioration. The freshly collected sample was washed with de-ionized water to eliminate visible dirt and removed the water quickly with a blotting paper. Then the samples were cut into small pieces, homogenized and accurate amount was weighed as required for different analysis. The samples were analyzed for three replication. The edible portion of whole fruit was determined by subtracting the weight of inedible parts of fruits from the weight of whole fruits. The pH of fruit extract was determined with a digital pH meter (Type H1 98106 by HANNA) and titratable acidity was estimated with the visual acid base by digital method (Ranganna, 1986). Crude fiber was determined by standard AOAC method (AOAC, 2005). Moisture content was determined by digital moisture analyzer (AnD MX-50). The total soluble solid (TSS) was determined with a hand refractometer (Type ATAGO, Model-9099). Reducing sugar and total sugar were determined by Lane and Eynon method (Ranganna, 1986). The estimation of total protein was made by Kjeldahl method and the total fat content of sample was determined by the standard AOAC method (AOAC, 2005). The content of total carbohydrate was determined by the following equation: Total Carbohydrate (%) =100 - {Moisture (%) + Protein (%) + Fat (%) + Ash (%)} Vitamin C was estimated by 2, 6-Dichlorophenolindophenol visual titration method according to AOAC (AOAC, 2005). Ash was determined by heating sample at 600⁰C in muffle furnace (Type Gallenkamp, Model-S90 NC/NA) for six hours until a constant weight was reached. Mineral solutions were prepared to analyze minerals and heavy metals (Kirk and Sawyer, 1991). All the minerals and heavy metals were estimated by Flame Atomic Absorption Spectrometric method (Thermo-Scientific iCE 3000 series, Atomic Absorption Spectrometer), and vapor hydride generation system used in case of As and Hg analysis. The approximate food energy was estimated (Edeoga et al., 2003), using equation: FE = {(%TC-%CF) x 4} + (% TF x 9) + (%TP x4) Where, FE = Food Energy in Kcal/100g, TC= Total Carbohydrate, CF = Crude Fiber, TF= Total Fat, TP = Total Protein. Dietary fiber was not analyzed and not considered in the calculation of total energy though fruits contain fair amount of dietary fiber among crude fiber and that’s why in this case food energy may be termed as approximate food energy.

Source of Information: Bangladesh J. Sci. Ind. Res. 49(3), 131-136, 2014

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Present study indicates that tropical fruits of Bangladesh are affluent sources of fiber, vitamin C and as well as many important minerals. The analyzed fruits contain adequate amount of fiber, a small amount of protein and fat. They also rich in sodium, potassium, calcium and magnesium and a little amount of zinc, manganese. Indian plum contains highest amount of energy and also sodium, calcium and magnesium. Rose apple contains highest amount of potassium. Java apple contains the highest amount of zinc. The heavy metals were not detected among the analyzed fruits, for this reason they are safe for consumption. This study will help the people to maintain their dietary requirements of micronutrients through consumption of tropical fruits. Regular intake of tropical fruits may alleviate the prevalence of micronutrient deficiency problem from Bangladesh and this information will be good resource for the food composition table as well.

Knowledge Management: Journal