Presentation 2

On

“Contamination of food associated

with their packaging material?”

Presented by

Sakshi Saxena

IBT VIIth sem

ASU2013010200124

•Grocery bags are made from high or low density polyethylene. Over time these chemicals have been linked to tissue changes, genetic damage, chromosomal errors, miscarriage, birth defects, early onset of puberty and hormonal changes.

•Phthalates are used as plasticizers (substances added to plastics to increase their flexibility) in Poly Vinyl Chloride (PVC). These increase insulin resistance, decrease anogenital distance in male infants, decreased levels of sex hormones, and other consequences for the human reproductive system, both for females and males

Food packed in

paper

The total number of colony forming units (CFU) of bacteria, yeasts, and moulds was estimated by the international standard method based on disintegration of paper (ISO 8784-1:2005).

1. Test paper-based materials : A total of 31 paper samples with varied pulp percentages of recycled matter were used. The content of recycled matter in the samples varied between 0 and 100%.

2. Examination of the total number of microorganisms in paper-based material:

3. Statistical analysis was performed using statistical package SPSS 12 (SPSS Inc., Chicago, USA).

1 g of the test paper was disintegrated in a volume of cooled sterile Ringer’s solution

Preparation of 1 % febrile solution

Plating

Incubation

Different dilutions of the fibre suspension were plated on nutrient agar on Petri dishes (TGEA for bacterial counts and PDA for yeasts and mould counts)

After incubation, the total number of colony forming units was estimated and the concentrations of bacteria, yeasts, and moulds per 1 g of paper were calculated

Estimation of colonies

Petri dishes were stored in an incubator at 37 ±1°C for 48 ± 3 h for bacteria and 30 ± 1°C for 5 days for yeasts and moulds under aerobic conditions..

•A plastic bottle is made of plastic and has this material type in direct contact with the foodstuff.

•For glass jars the materials in contact with the foodstuff are glass and coated metal from the closure.

•In the case of beverage cartons the direct food contact layer is not carton, but laminated plastic.

•For aluminium cans a coating is in direct contact with the beverage

The primary purpose of food packaging must continue to be maintaining the safety, wholesomeness, and quality of food.

In general, any food contact material should not release chemicals into the food at quantities that can harm human health.In order to assess the health impacts related to food packaging it is therefore essential to (1) understand the chemical composition of the packaging material and(2) the levels at which these compounds can partition into foodstuffs, a

process that is known as migration.

1. Public health impact of plastics: An overview. Neeti Rustagi, S. K. Pradhan,1 and Ritesh Singh.Indian J Occup Environ Med. 2011 Sep-Dec; 15(3): 100–103.

2. Microbial Contamination of Paper-based Food Contact Materials with Different Contents ofRecycled Fiber. Zuzana HLADÍKOVÁ, Kristina KEJLOVÁJitka SOSNOVCOVÁ, Dagmar JÍROVÁ, Adam VAVROUŠ , Stanislav JANOUŠEK , Milada SYČOVÁ and Vladimír ŠPELINA. Czech J. Food Sci., 33, 2015 (4): 308–312

3. Food Packaging Materials | Food Packaging Forum. (n.d.).Retrieved October 14, 2016, from http://www.foodpackagingforum.org/food-packaging-health/food-packaging-materials

4. Food Packaging -- Roles, Materials, and Environmental Issues. Retrieved October 14, 2016, from http://www.ift.org/knowledge-center/read-ift-publications/science-reports/scientific-status-summaries/food-packaging.aspx

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