NZQA Expiring unit standard
4312 version 5
Page 1 of 4
Title
Apply chemistry fundamentals in the New Zealand dairy industry
laboratory
Level
3
Credits
5
Purpose
People credited with this unit standard will be able to describe
fundamental dairy chemistry and conduct dairy chemistry tests
within a dairy laboratory. In addition, they will be able to use a
spectrophotometer and a conductivity meter.
Classification
Dairy Manufacturing > Dairy Laboratory Methodology
Available grade
Achieved
Entry information
Critical health and
safety prerequisites
Open.
Explanatory notes
1
Work must be carried out in accordance with organisational requirements.
2
Organisational requirements refers to instructions to staff on policy and procedures
(including the application of legislation to work situations) which are formally
documented or generally accepted at the work site. This may include legislation:
industry standards and methods, national and international standards and methods:
standards and methods published in internationally recognised reputable texts:
customer/organisation developed methods, standard operating procedures,
specifications, manuals, and manufacturer’s information.
3
The legislation and standards relevant to this unit standard may include but are not
limited to – Health and Safety in Employment Act 1992, Animal Products Act 1999,
Animal Products (Dairy) Regulations 2005, ISO/IEC 17025:1999 General
requirements for the competence of testing and calibration laboratories, NZFSA –
Approved Standards and Codes of Practice at
http://www.nzfsa.govt.nz/dairy/registers-lists.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
4312 version 5
Page 2 of 4
Outcomes and evidence requirements
Outcome 1
Identify chemical elements and structures, formulae, reactions and chemical
concentrations.
Range
element, atom, atomic number, atomic mass, periodic table, IONS, ionic bonds,
convalent bonds, compounds, relative molecular mass, moles, reactions,
concentration of chemical solutions.
Evidence requirements
1.1
An element and an atom are described.
1.2
Formulae for three common chemicals used in the dairy laboratory are
calculated.
1.3
Four chemical reactions are shown under experimental conditions and
described.
Range
metals and water, solubility and precipitation, heating metals,
carbon dioxide test.
Outcome 2
Conduct titration tests.
Evidence requirements
2.1
Titration and the critical factors which affect it are explained.
Range
concentration of solutions, chemical reactions that take place,
measuring the end point.
2.2
The Molarity for HCl, NaOH, and AgNO3 solutions are derived.
2.3
A 0.1 Molar solution of NaOH is standardised.
2.4
The lactic acid in raw milk is tested
2.5
The chemical formulae for the reactions of three titration tests on dairy products
are explained.
Range
titratable acidity, salt in butter, protein titration.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
4312 version 5
Page 3 of 4
Outcome 3
Demonstrate the operation of instruments relevant to a dairy laboratory.
Range
spectrophotometer, conductivity meter.
Evidence requirements
3.1
The basic design of a spectrophotometer and a conductivity meter is drawn.
3.2
Instruments are calibrated to the manufacturers' specifications.
3.3
Experiments on each instrument are conducted.
Outcome 4
Conduct dairy chemistry tests.
Evidence requirements
4.1
Tests are conducted
Range
Roese Gottlieb, Chloramine-T, Mohr, Acidity by Titration, Karl
Fischer moisture test, Total solids, Solubility Index, Calcium
EDTA, Ash.
4.2
Test results are calculated and recorded and results are compared with dairy
industry specifications
4.3
The two protein tests are described in terms of the test method used and their
relevance to the dairy industry.
Range
Protein, Whey Protein Nitrogen Index.
Outcome 5
Conduct product testing.
Evidence requirements
5.1
Tests are conducted in accordance with industry test methods, specifications
and site dairy laboratory procedures.
Range
safety procedures, equipment, controls, calculations,
documentation, frequency.
5.2
Non-conformance is dealt with or reported in accordance with dairy laboratory
quality systems.
5.3
Results and calculations are recorded in accordance with dairy laboratory
quality systems and organisational requirements.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
4312 version 5
Page 4 of 4
Outcome 6
Make up solutions.
Evidence requirements
6.1
Four solutions are made up relevant to the job tasks in the workplace in
accordance with the dairy laboratory quality systems.
Replacement information
This unit standard has been replaced by unit standard
28667.
This unit standard is expiring. Assessment against the standard must take place by
the last date for assessment set out below.
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
28 April 1995
31 December 2018
Revision
2
2 July 1999
31 December 2018
Revision
3
13 June 2003
31 December 2018
Rollover and
Revision
4
26 January 2007
Review
5
17 September 2015
31 December 2018
31 December 2018
Consent and Moderation Requirements (CMR) reference
0022
This CMR can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Please note
Providers must be granted consent to assess against standards (accredited) by NZQA,
before they can report credits from assessment against unit standards or deliver courses
of study leading to that assessment.
Industry Training Organisations must be granted consent to assess against standards by
NZQA before they can register credits from assessment against unit standards.
Providers and Industry Training Organisations, which have been granted consent and
which are assessing against unit standards must engage with the moderation system that
applies to those standards.
Requirements for consent to assess and an outline of the moderation system that applies
to this standard are outlined in the Consent and Moderation Requirements (CMR). The
CMR also includes useful information about special requirements for organisations wishing
to develop education and training programmes, such as minimum qualifications for tutors
and assessors, and special resource requirements.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016