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Study on Contaminants and Adulterants in Milk and Meat in Some Selected Locations

N. R. Sarker
PSO
Animal Production Research Division BLRI,Savar,Dhaka-1341

R. Khatun
SSO
Training Planning and Technology Transfer Division, BLRI, Savar, Dhaka-1341

M. K. Alam
Animal Production Research Division BLRI,Savar,Dhaka-1341

M.N. Munsi
SSO
Goat and Sheep Research Division

Abstract/ Executive Summary:

An investigation was carried out with the objectives to identify the presence of adulterants in milk and meat available in the market of selected locations. To determine the contaminants and adulterants in milk and meats available in the market under selected locations such as Dhaka, Savar, Gazipur, Pabna, Sirajgonj and also Super Markets in Dhaka & Chittagong cities, liquid milk samples marketed by different companies such as Milk Vita, Aarang, Farm Fresh, Pran, Tatka and Super Dairy were collected and analyzed in the Lab. by using Lactostar machine. The bacterial load in the samples was determined through culture in nutrient agar & EMB agar using pour plate method and heavy metal such as Cr, Pb and Cd by using AAS. The results indicated that the fat % among the Brand samples varies from 3.53 to 3.61 which are standard level except the Super Dairy (3.28) and Tatka (3.40). Lactose and SNF % was found as per recommended levels. The milk samples collected from different areas of Bangladesh were also analyzed and found that all samples contained below fat (%2.94 to 3.44) and protein (%2.93 to 3.22) percentage as per recommended level except protein (3.64%) from Chittagong local market. The lactose (%3.49 to 4.35) and SNF (%6.40 to 8.42) were found below as per recommended levels in milk collected from local market of Savar, Gazipur and Pabna. The bacteriological study of milk samples revealed that the total viable count (cfu/ml sample) was higher (7.6×10⁶ to 2.35×10¹²) in local markets (Vendor) of different location and the lowest in all Brand milk (3×10¹ to 3.5×10⁵) compared to the recommended level (Standard Plate Count:< 100,000) except Super Dairy Nasirabad(1.5×10¹²).The coliform count in all collected liquid milk samples was higher (0.7×10² to 5.2×10¹¹) compared to the recommended level (<50) except Aarong liquid milk, RD UHT milk, Tatka, Pran pasteurized liquid milk, Farm Fresh UHT milk and milk collected from Savar. Regarding the presence of heavy metal both in Brand and Local milk samples indicated that the “Cr” (ppm) content was higher (0.53 to 0.96 ppm) in all milk samples compared to the IAEA values (0.27 ppm : range 0.22-0.29 ppm) and “Pb” & “Cd” were found in trace amount in all milk samples. On the other hand, the bacteriological study in raw meat (beef) samples revealed that the total viable count (cfu/mg sample) was higher at three different times (7×10⁸to 6×10⁹) in local markets of Savar, Pabna and Sirajgonj compared to the recommended level (10⁴to 10⁵) except Nabinagar. The coliform count in collected raw meat (beef) samples from Pabna and Sirajgong was higher (9.5×10⁸ to 2×10¹⁰) compared to the recommended level except Nabinagar and Savar in different time intervals.

Keywords: Adultarent, Contaminants, Coliform, UHT

Location: APRD, BLRI, Savar, Dhaka

Start Date: 01-06-2011

End Date: 30-05-2012

Program Area: Postharvest and Agro-processing

Commodity: Milk

Objectives:

To identify the presence of adulterants in milk and meat available in the market of selected locations.to identify the presence of adulterants in milk and meat available in the market of selected locations.

Methodology:

1. Location:

In order to get data from liquid milk, different locations were selected for carrying out the experiment such as Dhaka, Chittagong, Savar, Gazipur, Pabna, Sirajgonj and also Super markets in Dhaka and Chittagong cities.

2. Milk Sample:

Experimental milk samples were categorized according to Brand liquid milk selling by different companies (Milk Vita, Arang, Pran, Farm Fresh, Tatka and Super Dairy) and liquid milk selling by Vendor.

3. Sample Test:

i. Nutritional composition:

Brand and local milk (Milk selling by Vendor) were analyzed in the lab. by using Lactostar machine for determination of nutritional composition such as Fat, Protein, Lactose and SNF.

iii. Heavy metal:

For detection of heavy metal such as Cr, Pb and Cd in Brand and local liquid milk were used Atomic Absorption spectrometer (AAS) from Soil Science Division of Bangladesh Agricultural Research Institute (BARI), Gazipur.

ii. Bacterial load:

For bacterial load (Total Viable count (cfu/ml milk) and Total coliform (cfu/ml milk) determination were used pour plate method through culture in nutrient agar and EMB agar that’s performed in the Animal Health Research Division Lab. at BLRI.

Statistical analysis:

Statistical analysis of the data will be carried out by use of one-way analysis of variance (ANOVA).

Source of Information: BLRI. Annual Reasearch Review Workshop, 2011-12. BLRI, Savar, Dhaka.

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The bacteriological study in raw meat (beef) samples revealed that the total viable count (cfu/mg sample) was higher at three different times (7×10⁸to 6×10⁹) in local markets of Savar, Pabna and Sirajgong compared to the recommended level (10⁴to 10⁵) except Nabinagar. The coliform count in collected raw meat (beef) samples from Pabna and Sirajgong was higher (9.5×10⁸ to 2×10¹⁰) compared to the recommended level except Nabinagar and Savar in different time intervals.

Knowledge Management: Report/Proceedings