Virtual Conference
Nutrition 2022

Okeke Onyeka

Scientific Equipment Development Institute, Nigeria

Title: Proximate , phytochemical and heavy metal levels of selected ripened fruits sold in market outlets within Enugu metropolis, Enugu State, Nigeria.

Abstract

Studies were carried out to evaluate the proximate, phytochemical and heavy metal levels of selected ripened fruits ( paw-paw, banana and plantain)  sold in market outlets within Enugu metropolis , using standard  analytical procedures and instrumentation. The parameters were evaluated in both the processed and control samples and were subjected to one way analysis  of variance at 5% confidence  level.  The purchased ripened  banana , paw-paw and plantain samples had  69.19± 3.96, 87.54± 4.20 and 79.54±1.72% respectively as moisture content compared to  58.71± 2.14, 74.66±3.01 and 70.71±3.01 % respectively obtained as moisture content in the control banana , paw-paw and plantain samples. The mean  ash , protein , carbohydrate and vitamin C contents of the purchased  banana , paw-paw and plantain samples were 1.71±0.21 , 6.90±1.01 , 8.84±2.11% ; 0.86±0.22 , 0.67±0.18 , 5.89±0.17% ; 2.34±0.54 , 47.24 ±1.89, 40.81± 2.24 % and 11.11± 2.15 ,  31.12±0.34 , 31.79±2.30 % compared to  3.16±0.16 , 7.61±0.46, 11.16±0.35% ; 1.24±0.39, 0.75±0.14 , 6.82±0.33 % ;4.76±0.20 , 50.66±3.41, 45.52±.46 % ; 16.02±1.49, 37.22±0.91, 25.21±2.71% gotten as mean ash, protein , carbohydrate and vitamin C contents in the control banana , paw-paw and plantain samples respectively.  The mean moisture content was statistically higher in the investigated  purchased samples than it was in the control samples.  However, the mean ash, protein , carbohydrate and vitamin C contents of the control samples were higher than they were in the purchased samples. The mean flavonoids content in  the control  banana , paw-paw and plantain samples  were 0.57±0.08 , 0.87±0.26 and 0.43±0.06 mg/g respectively, but was 0.39±0.06 , 0.66±0.10 and 0.38±0.02mg/g respectively in the purchased ripened banana , paw-paw and plantain samples. The mean alkaloids content in the control banana , paw-paw and plantain samples were 0.29±0.05 , 0.93±0.09  and 0,32±0.05 mg/g respectively , but was 0.18±0.04, 0.85±0.06 and 0.20±0.04 mg/g respectively in the purchased banana , paw-paw and plantain samples.
Lead was not detected in the control banana samples but was 0.02±0.01 and 0.12±0.05µg/g respectively in the control paw-paw and plantain samples.  The mean Pb values in the purchased  banana , paw-paw and plantain samples were 0.05±0.02 , 0.10±0.04 and 0.33±0.08 µg/g respectively. Cadmium  was not detected  in the investigated control samples but had mean values of 0.07±0.02,  and 0.15±0,03µg/g respectively in the purchased paw-paw and plantain samples.
Although ripening agents generally accelerates the ripening of fruits to reduce economic loss  due to possible decay, however, it could  at the same time reduce the nutritive and phytochemical contents  of the ripened fruits as was the suggested case with the investigated samples purchased from the market.The contaminant ( heavy metal ) levels of the purchased samples were equally found to be  higher in the purchased samples than they were  in the control samples.

Biography

Okeke Onyeka had his PhD in Environmental Chemistry, Nnamdi Azikiwe University Awka, Anambra State, Nigeria , in the year 2017.
He has authored and co-authored 56 publications with 82 citations and  his publication h-index is 5. He is currently an assistant chief scientific officer at scientific equipment development institute, enugu, Nigeria.