Essay
Unit 19 - Assignment 3
- Institution
- PEARSON (PEARSON)
Unit 19 Assignment 3 includes P6, M3, M4, M5, M6, D2 and D3
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Unit 19 – Assignment 1 (P6)Produce a table listing ten types of standard procedures using used in analysis in a forensic laboratory.
Standard operation procedure to deal with these things
Ordering procedure of The ordering procedures for the chemicals are based on a lot of research as you have to find the cheapest
chemicals suppliers. You have to find out how much a specific chemical costs and work out how much of the
chemical you need, then the order has to be approved and if accepted it is then sent to be ordered. The
collage has to have a license to buy and store the chemicals.
When the items arrive they come to the preparation room to be sorted and then to be stored. Sometimes
if the company does not have the chemical you need then you can get it from a university i.e. Cambridge.
Disposal of chemicals Before the chemicals are disposed they have to be neutralized, this is done by adding the opposite
chemical to the chemical that is going to be neutralized and disposed of. For example to neutralize a acid
you have to add a alkali. You then add it to a container which they are disposed in, each type of chemical
has a different container, one for organic chemicals one for acids one for alkalis etc. The chemicals are
disposed after each academic year.
Location of chemical stores The chemical stores on campus are like metal sheds that are kept outside away from the college buildings
kept in a corner.
Store management The stores are managed based on the type of chemical, solution, radioactive element etc. For example the
radioactive elements are kept in a safe made from lead. The flammable chemicals are kept in a flammable
cupboard to limit the risks in case there was a fire. The chemical stores are basically managed for each
individual chemical.
Calibration of equipment Equipment like a colorimeter or PH meter has to be calibrated before and after each measurement. For
normal use calibration should be performed at the beginning of each day.
Operation of fume cupboard Risk assessment should determine whether it is acceptable to use a recirculating fume cupboard for the
intended substance. Chemicals with high hazard ratings (e.g. Highly Toxic, Carcinogen and known
Sensitizers) must not be handled in a recirculating fume cupboard.
Users must ensure the correct filter for the substances to be used is fitted and they should consider the
compatibility of the different substances they may be working with (Appendix Two).
Users should be aware of the life span of the filter and ensure the expected expiry date is clearly
displayed. This will be based on expected usage patterns therefore any significant changes to use should
be reassessed regularly. Routine system checks should include confirmation that the filter is ‘in date’ for
use.
Disposal routes for all used filters should be identified either through maintenance contracts disposal
routes or Sustainability to ensure all hazards, hazardous waste regulations and Duty of Care is managed.
A standard operating procedure should be established to monitor fume cupboard use; this must include
details of handling, replacing and disposing of contaminated filters.
Use of ovens A laboratory oven heats its contents via the principle of convection. The heating element is not located
within the specimen chamber of the oven, but in a separate external envelope. This prevents radiant heat
from affecting the specimen, but the resulting temperature of the oven walls is enough to heat and
dehydrate a specimen.
Convective heat transfer is achieved by gravity or mechanical convection. In the former, cooler air is
displaced by warmer air and directed towards the heating element until the entire chamber is up to
temperature. Since this method has poor uniform heat distribution, energy waste, and a longer preheat
time than mechanical convection, mechanical convection lab ovens are favorable. These types heat
quicker and more evenly due to blowers and baffles in the oven chamber.
Air intakes and exhausts can be adjusted to withhold or release humidity, and are necessary to expel
VOCs and fumes. Insulation reduces the rate of thermal transfer and is responsible for the energy
efficiency of the oven. The oven itself is typically steel in construction which helps prevent radiant heat
from the oven exterior. A locking door with robust gaskets provides user access to the oven chamber.
Radiation Procedure All researchers using radioactive materials must:
•obtain a permit for the possession and use of radioactive materials (contact the Radiation Protection
Division);
•complete required training modules; and
•comply with the radiation policies and procedures of the university (contained in the Radiation
Protection manual).
The Radiation Protection manual contains information on a number of topics including license
committees, the permitting process, purchasing procedures, transfer procedures, general safety,
personnel dosimeter, waste management, emergency management (spill control), record keeping, and
regulatory guides on occupational exposure and prenatal exposure.
Equipment maintenance Equipment shall be maintained as specified in the technical procedure.
Critical equipment shall have documented procedures for the maintenance process. Maintenance
procedures and frequencies, either in the form of vendors' manuals or in-house procedures, shall be
available for each piece of equipment. The operating and maintenance manuals shall be readily available
to the operator. In the absence of manufacturer’s instructions, instructions shall be provided in the
technical procedure.
Preventative maintenance procedures (other than basic cleaning) for each equipment item shall be
developed by each Section unless already described elsewhere (e.g., the equipment manual) and shall be
performed according to a regular, predetermined
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