SAQA All qualifications and part qualifications registered on the National Qualifications Framework are public property. Thus the only payment that can be made for them is for service and reproduction. It is illegal to sell this material for profit. If the material is reproduced or quoted, the South African Qualifications Authority (SAQA) should be acknowledged as the source.
SOUTH AFRICAN QUALIFICATIONS AUTHORITY 
REGISTERED UNIT STANDARD THAT HAS PASSED THE END DATE: 

Quantify analyte content by precipitation gravimetry 
SAQA US ID UNIT STANDARD TITLE
11033  Quantify analyte content by precipitation gravimetry 
ORIGINATOR
SGB Mining and Minerals 
PRIMARY OR DELEGATED QUALITY ASSURANCE FUNCTIONARY
-  
FIELD SUBFIELD
Field 06 - Manufacturing, Engineering and Technology Fabrication and Extraction 
ABET BAND UNIT STANDARD TYPE PRE-2009 NQF LEVEL NQF LEVEL CREDITS
Undefined  Regular  Level 4  NQF Level 04  5 
REGISTRATION STATUS REGISTRATION START DATE REGISTRATION END DATE SAQA DECISION NUMBER
Passed the End Date -
Status was "Reregistered" 		 2018-07-01  2023-06-30  SAQA 06120/18 
LAST DATE FOR ENROLMENT LAST DATE FOR ACHIEVEMENT
2024-06-30   2027-06-30  

In all of the tables in this document, both the pre-2009 NQF Level and the NQF Level is shown. In the text (purpose statements, qualification rules, etc), any references to NQF Levels are to the pre-2009 levels unless specifically stated otherwise.  

This unit standard does not replace any other unit standard and is not replaced by any other unit standard. 

PURPOSE OF THE UNIT STANDARD 
This unit standard will be useful to people who are responsible for quantifying analyte content by means of a precipitation gravimetric analysis. It will apply to Laboratory Analysts in an Analytical Laboratory.

People credited with this unit standard are able to
  • Demonstrate knowledge relating to precipitation gravimetric methods
  • Quantify an analyte by means of precipitation gravimetry 
    		•

    LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING 
    The credit calculation is based on the assumption that learners are already competent in terms of the following outcomes or areas of learning when starting to learn towards this unit standard:
  • Determine the mass of a substance (Unit Standard Ass-G-002)
  • Basic Laboratory Health, Safety and Environmental standards
  • Dissolve solid samples for analysis (Unit Standard Ass-G-010)
  • Perform measurements using volumetric glassware (Unit Standard Ass-G-003)
  • Science, Communications, and Mathematics at ABET Level 4 or equivalent
  • Basic chemistry unit standard 
    		•

    UNIT STANDARD RANGE 
    Specific range statements are provided in the body of the unit standard where they apply to particular specific outcomes or assessment criteria. 

    Specific Outcomes and Assessment Criteria: 

    SPECIFIC OUTCOME 1 
    Demonstrate knowledge relating to precipitation methods. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    1. The types of filtration apparatus are correctly identified and one application of each is described. 
    ASSESSMENT CRITERION RANGE 
    Range must include:
  • Vacuum filtration
  • Gravity filtration
     
    		•

    ASSESSMENT CRITERION 2 
    2. The physical and chemical properties of the filter media and the application/s of the different types are described with reference to the nature of the precipitate 
    ASSESSMENT CRITERION RANGE 
    1.Range must include: Properties
  • Pore size
  • Hardness
  • Ash content
  • Chemical resistance

    2. Range must include: Filter Media:
  • Papers
  • Membranes
  • Sintered glass
  • Pulp
  • Fibres
     
    		•

    ASSESSMENT CRITERION 3 
    3. The factors, which contribute to a successful precipitation, are briefly described. 
    ASSESSMENT CRITERION RANGE 
    Range must include:
  • Correct dissolution
  • Precipitation conditions
  • Elimination of matrix interference`s
     
    		•

    ASSESSMENT CRITERION 4 
    4. The factors, which contribute to the successful filtration of a precipitate, are briefly described. 
    ASSESSMENT CRITERION RANGE 
    Factors must include:
  • Nature of precipitate
  • Choice of filter medium
  • Washing of precipitate
  • Quantitative transfer
     
    		•

    ASSESSMENT CRITERION 5 
    5. The factors that affect the stability of the final analyte are briefly described 
    ASSESSMENT CRITERION RANGE 
    Factors must include:
  • Drying to a constant mass
  • Conversion to pure substance
  • Stability of analyte
     
    		•

    ASSESSMENT CRITERION 6 
    6. The ability to correctly calculate gravimetric factors and molecular mass is demonstrated. 

    ASSESSMENT CRITERION 7 
    7. The consequences of non-compliance with specified requirements are explained with respect to personal and team health and safety, impact on the environment, production, costs and lost time. 

    SPECIFIC OUTCOME 2 
    Quantify an analyte by means of precipitation gravimetry. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    1. Hazards and risks pertaining to the process are identified and explained with reference to team health, safety and environmental impact. The appropriate preventive actions are listed and applied. 

    ASSESSMENT CRITERION 2 
    2. Equipment needed for the process is correctly identified, is in good working order and used according to manufacturers' instructions and standard task procedures. 

    ASSESSMENT CRITERION 3 
    3. The correct personal protective equipment is operational and worn in accordance with manufacturers' specifications and specified requirements. 

    ASSESSMENT CRITERION 4 
    4. The selected chemicals meet the requirements as regards purity as stipulated in the chosen method. The reagents prepared from the selected chemicals meet the requirements of the chosen method. 

    ASSESSMENT CRITERION 5 
    5. The method used is appropriate for the analyte sought, in particular sample type and analyte concentration. The method is followed in the prescribed sequence. 
    ASSESSMENT CRITERION RANGE 
    Method must include:
  • Verification of sample
  • Correct techniques for dissolution, precipitation, filtration, drying, ignition and weighing
     
    		•

    ASSESSMENT CRITERION 6 
    6. The calculated value of the analyte is within given limits for accuracy and precision as per laboratory standard. The reporting of results is in accordance with specified requirements. 

    ASSESSMENT CRITERION 7 
    7. The work is conducted to meet specified health, safety and environmental standards and production targets. 
    ASSESSMENT CRITERION RANGE 
    Health, safety and environmental standards must include:
  • Housekeeping
  • Waste disposal
  • Storage
     
    		•


    UNIT STANDARD ACCREDITATION AND MODERATION OPTIONS 
    1. Anyone assessing a learner against this unit standard must be registered as an assessor with the relevant ETQA.

    2. Any institution offering learning that will enable achievement of this unit standard must be accredited as a provider through the relevant ETQA by SAQA.

    3. Moderation of assessment will be overseen by the relevant ETQA according to the moderation guidelines and the agreed ETQA procedures. 

    UNIT STANDARD ESSENTIAL EMBEDDED KNOWLEDGE 
    Essential embedded knowledge will be assessed through assessment of the specific outcomes in terms of the stipulated assessment criteria. Candidates are unlikely to achieve all the specific outcomes, to the standards described in the assessment criteria, without knowledge of the listed embedded knowledge. This means that for the most part, the possession or lack of the knowledge can be directly inferred from the quality of the candidate`s performance. Where direct assessment of knowledge is required, assessment criteria have been included in the body of the unit standard.

    The following embedded knowledge is addressed in an integrated way in the unit standard:
  • Report writing
  • Health and safety knowledge
  • Legal and site-specific requirements 
    		•

    UNIT STANDARD DEVELOPMENTAL OUTCOME 
    N/A 

    UNIT STANDARD LINKAGES 
    N/A 


    Critical Cross-field Outcomes (CCFO): 

    UNIT STANDARD CCFO IDENTIFYING 
    Identify and solve problems and make decisions using critical and creative thinking.
    Note:
    The ability of the candidate to identify technical problems, sub-standard and hazardous conditions, assess and take appropriate action. 

    UNIT STANDARD CCFO WORKING 
    Work effectively with others as members of a team, group, organisation or community.
    Note:
    The candidate is required to maintain the link in the process in order to achieve production, health, safety and environmental targets. 

    UNIT STANDARD CCFO ORGANISING 
    Organise and manage themselves and their activities responsibly and effectively.
    Note:
    The candidate is required to prioritise and integrate the various activities in order to meet the set targets. 

    UNIT STANDARD CCFO COLLECTING 
    Collect, analyse, organise and critically evaluate information.
    Note:
    The ability of the candidate to collect and evaluate information from numerical data and/or physical observations in terms of specified requirements. 

    UNIT STANDARD CCFO COMMUNICATING 
    Communicate effectively, using visual, mathematical and / or language skills in the modes of oral and / or written presentations.
    Note:
    The candidate is required to accurately and clearly convey information to relevant personnel. 

    UNIT STANDARD CCFO SCIENCE 
    Use science and technology effectively and critically showing responsibility towards the environment and health of others.
    Note:
    The candidate is required to use equipment responsibly to avoid environmental pollution and to safeguard team health. 

    UNIT STANDARD CCFO DEMONSTRATING 
    Demonstrate an understanding of the world as a set of related systems by recognising that problem-solving contexts do not exist in isolation.
    Note:
    The candidate is aware of his/her role in the organization in terms of social, economic and environmental impact. 

    UNIT STANDARD ASSESSOR CRITERIA 
    N/A 

    REREGISTRATION HISTORY 
    As per the SAQA Board decision/s at that time, this unit standard was Reregistered in 2012; 2015. 

    UNIT STANDARD NOTES 
    SPECIFIED REQUIREMENTS

    Specified requirements include legal and site-specific requirements and are contained in one or more of the following documents:

    LEGAL
  • Relevant Acts: e.g. Mine Health & Safety Act, 1996 (Act no 29/1996), and Minerals Act and Regulations, 1991 (Act no 50/1991)
  • Mandatory Codes of Practice
  • SABS and other relevant Standards
  • Chief Inspector of Mines` Directives

    SITE SPECIFIC
  • Hazard Identification and Risk Assessments (HIRA)
  • Occupational Health and Safety Risk Management Programme
  • Managerial Instructions
  • Mine Standard Procedures
  • List of Recorded OH&S Risks
  • Working Guides
  • Equipment and Materials Specifications

    NOTES TO ASSESSORS

    Assessors should keep the following principles in mind when designing and conducting assessments against this unit standard:
  • Focus the assessment activities on gathering evidence in terms of the main outcome expressed in the title to ensure assessment is integrated rather than fragmented. Remember we want to declare the person competent in terms of the title. Where assessment at title level is unmanageable, then focus assessment around each specific outcome, or groups of specific outcomes.
  • Make sure evidence is gathered across the entire range, wherever it applies. Assessment activities should be as close to the real performance as possible, and where simulations or role-plays are used, there should be supporting evidence to show the candidate is able to perform in the real situation.
  • Do not focus the assessment activities on each assessment criterion. Rather make sure the assessment activities focus on outcomes and are sufficient to enable evidence to be gathered around all the assessment criteria.
  • The assessment criteria provide the specifications against which assessment judgements should be made. In most cases, knowledge can be inferred from the quality of the performances, but in other cases, knowledge and understanding will have to be tested through questioning techniques. Where this is required, there will be assessment criteria to specify the standard required.
  • The task of the assessor is to gather sufficient evidence, of the prescribed type and quality, as specified in this unit standard, that the candidate can achieve the outcomes again and again and again. This means assessors will have to judge how many repeat performances are required before they believe the performance is reproducible.
  • All assessments should be conducted in line with the following well documented principles of assessment: appropriateness, fairness, manageability, integration into work or learning, validity, direct, authentic, sufficient, systematic, open and consistent. 
    		•

    QUALIFICATIONS UTILISING THIS UNIT STANDARD: 
      ID QUALIFICATION TITLE PRE-2009 NQF LEVEL NQF LEVEL STATUS END DATE PRIMARY OR DELEGATED QA FUNCTIONARY
    Elective  64950   Further Education and Training Certificate: Laboratory Analysis  Level 4  NQF Level 04  Passed the End Date -
    Status was "Reregistered"     		 2023-06-30  As per Learning Programmes recorded against this Qual 
    Elective  58952   Further Education and Training Certificate: Laboratory Analysis  Level 4  NQF Level 04  Passed the End Date -
    Status was "Registered"     		 2008-08-05  As per Learning Programmes recorded against this Qual 


    PROVIDERS CURRENTLY ACCREDITED TO OFFER THIS UNIT STANDARD: 
    This information shows the current accreditations (i.e. those not past their accreditation end dates), and is the most complete record available to SAQA as of today. Some Primary or Delegated Quality Assurance Functionaries have a lag in their recording systems for provider accreditation, in turn leading to a lag in notifying SAQA of all the providers that they have accredited to offer qualifications and unit standards, as well as any extensions to accreditation end dates. The relevant Primary or Delegated Quality Assurance Functionary should be notified if a record appears to be missing from here.
     
    NONE 


    All qualifications and part qualifications registered on the National Qualifications Framework are public property. Thus the only payment that can be made for them is for service and reproduction. It is illegal to sell this material for profit. If the material is reproduced or quoted, the South African Qualifications Authority (SAQA) should be acknowledged as the source.