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Evidence Guide: MSL973002 - Prepare working solutions

Student: __________________________________________________

Signature: _________________________________________________

Tips for gathering evidence to demonstrate your skills

The important thing to remember when gathering evidence is that the more evidence the better - that is, the more evidence you gather to demonstrate your skills, the more confident an assessor can be that you have learned the skills not just at one point in time, but are continuing to apply and develop those skills (as opposed to just learning for the test!). Furthermore, one piece of evidence that you collect will not usualy demonstrate all the required criteria for a unit of competency, whereas multiple overlapping pieces of evidence will usually do the trick!

From the Wiki University

 

MSL973002 - Prepare working solutions

What evidence can you provide to prove your understanding of each of the following citeria?

Make up working solutions

  1. Identify the relevant standard methods for solution preparation
  2. Assemble specified laboratory equipment
  3. Select and prepare materials and solvent of specified purity
  4. Measure appropriate quantities of reagents for solution preparation and record data
  5. Prepare labels and log solution details in laboratory register
  6. Transfer solutions to appropriately labelled containers
Identify the relevant standard methods for solution preparation

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assemble specified laboratory equipment

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Select and prepare materials and solvent of specified purity

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Measure appropriate quantities of reagents for solution preparation and record data

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Prepare labels and log solution details in laboratory register

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Transfer solutions to appropriately labelled containers

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Evidence Guide

Elements describe the essential outcomes.

Performance criteria describe the performance needed to demonstrate achievement of the element.

1

Make up working solutions

1.1

Identify the relevant standard methods for solution preparation

1.2

Assemble specified laboratory equipment

1.3

Select and prepare materials and solvent of specified purity

1.4

Measure appropriate quantities of reagents for solution preparation and record data

1.5

Prepare labels and log solution details in laboratory register

1.6

Transfer solutions to appropriately labelled containers

2

Check existing stock of solutions

2.1

Monitor shelf life of working solutions and identify those that are unfit for use according to laboratory procedures

2.2

Replace out-of-date or reject solutions according to laboratory procedures

3

Maintain a safe work environment

3.1

Use appropriate safety procedures and personal protective equipment (PPE) to ensure personal safety and that of other laboratory personnel

3.2

Store reagents and clean/store glassware and equipment in accordance with workplace procedures

3.3

Minimise generation of waste and environmental impacts

3.4

Clean up spills using appropriate techniques

3.5

Ensure the safe collection of laboratory and hazardous waste for subsequent disposal

Required Skills and Knowledge

Elements describe the essential outcomes.

Performance criteria describe the performance needed to demonstrate achievement of the element.

1

Make up working solutions

1.1

Identify the relevant standard methods for solution preparation

1.2

Assemble specified laboratory equipment

1.3

Select and prepare materials and solvent of specified purity

1.4

Measure appropriate quantities of reagents for solution preparation and record data

1.5

Prepare labels and log solution details in laboratory register

1.6

Transfer solutions to appropriately labelled containers

2

Check existing stock of solutions

2.1

Monitor shelf life of working solutions and identify those that are unfit for use according to laboratory procedures

2.2

Replace out-of-date or reject solutions according to laboratory procedures

3

Maintain a safe work environment

3.1

Use appropriate safety procedures and personal protective equipment (PPE) to ensure personal safety and that of other laboratory personnel

3.2

Store reagents and clean/store glassware and equipment in accordance with workplace procedures

3.3

Minimise generation of waste and environmental impacts

3.4

Clean up spills using appropriate techniques

3.5

Ensure the safe collection of laboratory and hazardous waste for subsequent disposal

Evidence of competence in this unit must satisfy all of the requirements of the elements and performance criteria, and include demonstration of:

safely preparing at least five (5) examples of correctly labelled working solutions, including calculation of the quantities involved and any dilutions required

checking that existing stocks of working solutions and identifying those unfit for use, including:

noting turbidity to exclude absorption of moisture

noting deposits to exclude microbial contamination or chemical degradation

noting crystals to exclude evaporation

noting colour changes indicating a pH shift with solutions containing indicators

checking expiry dates on solution containers

following workplace procedures for the safe use of hazardous chemicals, laboratory glassware and equipment

accurately labelling and storing solutions in accordance with workplace procedures

safely cleaning up spills and collecting/disposing of waste in accordance workplace procedures

recording and presenting data accurately and legibly.

Must provide evidence that demonstrates knowledge of:

concepts of metrology, including:

all measurements are estimates

measurements belong to a population of measurements of the measured parameters

precision, accuracy and significant figures

sources of error, uncertainty and repeatability

traceability

international system of units (SI)

concentration terms, such as % w/w, % w/v, % v/v, ppm (mg/L) and molarity

basic theory of acids, bases, salts, buffers and neutralisation

what affects solubility

difference between aqueous and organic solutions

periodic table, symbols of the elements, atomic weights, and difference between elements and compounds

chemical formulae

workplace procedures for preparing solutions

calculations required to prepare specified amounts of solutions of specified concentration

use of material safety data sheets (MSDS) and workplace procedures for preparing, handling and disposing of solutions and cleaning up spillages

relevant hazards, work health safety (WHS) and environment requirements.

Range Statement

This field allows for different work environments and conditions that may affect performance. Essential operating conditions that may be present (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) are included.

Standards, codes, procedures and/or workplace requirements

Standards, codes, procedures and/or workplace requirements include the latest version of one or more of:

Australian and international standards covering the requirements for the competence of testing and calibration laboratories, laboratory safety, quality management and laboratory glassware

national work health and safety (WHS) standards and codes of practice, national environmental protection measures, and national measurement regulations and guidelines

specific codes, guidelines and procedures, such as National Association of Testing Authorities (NATA) accreditation requirements and principles of good laboratory practice (GLP)

workplace documents, such as standard operating procedures (SOPs); quality and equipment manuals; calibration and maintenance schedules; material safety data sheets (MSDS); safety procedures; material, production and product specifications;, production and laboratory schedules; workplace recording and reporting procedures; and waste minimisation and safe disposal procedures

workplace procedures and standard methods for preparing working solutions

Working solutions

Working solutions include, but are not limited to, one or more of:

solutions required for diagnostic/analytical and limit tests in food and chemical laboratories, such as sulphates, chlorides and heavy metals

staining solutions for standard diagnostic/analytical procedures in biomedical/environmental laboratories, such as cell staining, fixation of cells and tissues, suspension of cells and titrimetric indicators

solutions required for laboratory maintenance and disinfection, such as 70% ethanol and hypochlorite

Safety procedures

Safety procedures include, but are not limited to, one or more of:

use of PPE, such as safety glasses, gloves and coveralls

correctly labelling reagents and hazardous materials

handling and storing hazardous material and equipment in accordance with labels, MSDS, manufacturer instructions and workplace procedures and regulations

regular cleaning and/or decontamination of equipment

prompt clean-up of spills in accordance workplace procedures

WHS and environmental management requirements

WHS and environmental management requirements include:

· complying with WHS and environmental management requirements at all times, which may be imposed through state/territory or federal legislation. These requirements must not be compromised at any time

· applying standard precautions relating to the potentially hazardous nature of samples

accessing and applying current industry understanding of infection control issued by the National Health and Medical Research Council (NHMRC) and State and Territory Departments of Health, where relevant