EVALUATION OF SOME HEAVY METALS CONCENTRATIONS IN CHOCOLATE, CANDIES AND TOMATO PUREE
114 Users found this project useful

EVALUATION OF SOME HEAVY METALS CONCENTRATIONS IN CHOCOLATE, CANDIES AND TOMATO PUREE

 

ABSTRACT
This study was initiated as a follow-up information on some impounded products tomato puree (Samples A and B) chocolates and candies (Samples C, D, E and F) imported from China, and sold in Nigerian markets. This result as their failure to meet National Agency for food drug administration and control (NAFDAC) regulatory standard. Samples A, B, C, D, E and F were collected in five markets from each six states of the six geographical zones: North-West (Kano), North-East (Bauchi), North-Central (Kogi), South-West (Lagos), South-East (Abia), and South-South (Rivers) of the country. In order to evaluate the quality of the products, the levels of some heavy metals (Cu, Mn, Fe, Ni, Zn, Ti and Cr) were evaluated in the samples using X-ray fluorescence (XRF). Concentrations of metals in both tomato puree ranged 4.0 – 4.5  mg/g for Cu, 18.0 – 42.5mg/g for Mn, 26.0 – 62.5mg/g for Fe, 4.0 – 56.0mg/g for Ni, 27.0 – 35.2mg/g for Zn, ND – 25.0mg/g for Ti, and ND – 20.0mg/g for Cr while concentrations of metals in both chocolates and candies ranged 3.0 – 4.2  mg/g for Cu, 40.0 – 55.7mg/g for Mn, ND – 102.5mg/g for Fe, ND – 305.0mg/g for Ni, ND – 42.5mg/g for Zn, ND – 23.8mg/g for Ti, and ND – 10.8mg/g for Cr. The concentrations of all the metals studied were generally higher in samples A and B compared to recommended levels of these metals in vegetable crops. Also, the data showed that these metals are at higher levels in samples C, D, E and F compared to other studies in candies and chocolates in Nigeria. Correlation analysis among metals revealed positive correlations, which indicates similar sources of these metals. Also, evaluation of dietary intake of these products daily revealed that sample A (except for Cu and Fe), B, C (except for Cu), D and E are above the daily dietary recommended limit for all the metals studied in food. Thus, frequent intake of these contaminated products is likely to induce health effects arising largely from Cu, Mn, Fe, Ni and Zn.

CHAPTER ONE
INTRODUCTION
1.1  BACKGROUND OF THE STUDY
Recently, there is an increasing concern about the quality of imported foods and food related products in several parts of the world (Maxwell and Neumann, 2009) particularly from China. This, as observed by the United States Congress, was due to the large size of shipments, the many different routes of entry, the variety of foods imported, and the large numbers of potential contaminants make effective interdiction of contaminated foods difficult (Congress Research Service (CRS) Report, 2008). Additionally, the US Congress observed that many products were brought into the United States by travelers especially residents travelling back and forth regularly to China. Among the common products imported were canned tomatoes, chocolates, candies, biscuits, bean paste, bean curd, teas and various nuts and spices (CRS Report, 2008).
According to the United States Congress Research Service Report (2008), in early 2007, evidence emerged that adulterated pet food ingredients from China had caused the deaths of many dogs and cats. However, toxicological and environmental studies have interest in the determinations of toxic elements in food. "Food safety" implies absence or acceptable and safe levels of contaminants, adulterants, naturally occurring toxins or any other substance that may make food injurious to health on an acute or chronic basis. Food quality can be considered as a complex characteristic of food that determines its value or acceptability to consumers. Besides safety, quality attributes includes nutritional value, organoleptic properties such as appearance, color, texture, taste and functional properties (World Health Organization (WHO), 1998).

GET THE COMPLETE PROJECT

Peace From Unilag

I cried not knowing how to go about my project but the day i searched online and saw iprojectmaster, i called and got my full project in less than 15minutes, i was shocked!


Oluchi From Michael Opara University

If you are a student and you have not used iprojectmaster materials, you are missing big time! iprojectmaster is the BEST


Uduak From Uniuyo

iProjectMaster is the best project site for students. Their works are unique and free of plagiarism!


Musa From Ahmadu Bello University

Thank you iprojectmaster for saving my life, please keep it up and may God continue to bless you people.


Samuel From Ajayi Crowther University

You guys just made life easier for students. Thanks alot iprojectmaster.com


Merry From BSU

I am now a graduate because of iprojectmaster.com, God Bless you guys for me.