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Cross-contamination of products can occur through these means:

  • direct – raw material and cooked material in direct contact
  • dripping – incorrect storage and packaging
  • indirect – inadequate personal hygiene or inadequate cleaning of surfaces the food contacts.

Your staff should be made aware of their responsibility to prevent cross-contamination in the workplace.

Raw material contamination

There is increased risk of the presence of food poisoning microorganisms associated with the following products

  • red meat
  • poultry
  • untreated milk
  • raw eggs
  • shellfish.

All raw food and ingredients must always be kept completely separate from ready-to-eat or cooked foods (high-risk food). Your staff should be aware that good hygiene practices must be in place to prevent any contact between raw food and cooked products; for example, the liquid from thawing foods, especially frozen poultry, must not be allowed to contaminate wiping cloths, high-risk food, or equipment used for high-risk food.

Raw materials that may contain foreign bodies, which will be undesirable in the finished product, require careful inspection prior to acceptance or must undergo specific preparation as part of the production process. For example, stones must be removed from fresh peas and fragments of walnut shells cleaned from diced walnuts.

Raw material control procedures

As a food safety manager, you should be aware of any potential chemical, physical, or biological hazards which may be present in specific raw materials. You need to have a pre-acceptance inspection system in place to assess the acceptability of raw material coming into your facility.

When you receive raw materials after the pre-acceptance inspection is done, a post-receipt inspection system must be in place to code the raw materials entering your premises so that they can be identified. This is a necessary step in preventing contamination issues later. Your traceability system should also include where and how the raw material is stored and where the raw material is eventually used.

When using raw materials, use color-coded wiping cloths and chopping boards. They are essential in preventing cross-contamination of products.

All staff must be trained in the prevention of contamination of raw material and made aware of the specific procedures in place to reduce contamination.

Product packaging

Packaging should be clean and free from contaminates such as dust. The packaging must also be stored under conditions to prevent contamination.

Indeed, packaging should be controlled in a similar way as any other raw material.

Packaging should not itself pose a hazard and should be suitable for its purpose. For example, packaging should be strong enough not to break during filling, processing, or storage.

Packaging used for the storage of raw materials is very important in preventing product contamination. There should be an appropriate barrier to prevent contact between raw materials, ingredients, and finished product.

During manufacture, any unused packaging that has been removed from its protective outer packaging should be suitably protected before being returned to storage.

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
hey
Giriraj
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Food safety knowledge network basic level requirements. OpenStax CNX. Dec 30, 2009 Download for free at http://cnx.org/content/col11142/1.4
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