NZQA registered unit standard
8436 version 5
Page 1 of 3
Title
Demonstrate laboratory solvent and distillation separation
techniques
Level
4
Credits
5
Purpose
People credited with this unit standard are able to: separate a
component from a mixture using techniques of solvent
extraction; purify a substance by recrystallisation; describe the
use of a phase diagram to predict fractional distillation
behaviour; and separate a component from a mixture by
distillation.
Classification
Science > Chemistry
Available grade
Achieved
Explanatory notes
1
All work must be carried out in accordance with the quality management system,
documented protocol system or Standard Operating Procedures (SOP) typically
acceptable in a commercial or research laboratory.
2
Health and Safety practices must conform to Australian/New Zealand Standard
AS/NZS 2243:2006 Set – Safety in Laboratories Parts 1, 2, 3, 7, and 10 available at
http://www.standards.co.nz and http://infostore.saiglobal.com/store.
3
Legislation applicable to this unit standard includes:
Health and Safety in Employment Act 1992;
Hazardous Substances and New Organisms Act 1996.
4
Knowledge underpinning the competencies in this unit standard includes an outline of
partition theory.
5
Glossary
Laboratory procedures refer to documented systems or processes of operation,
which may be found in a SOP manual, quality management system or protocol
system documentation. These procedures are external and/or internal laboratory
requirements governing laboratory work.
NZQA National Qualifications Services
SSB Code 130301
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
8436 version 5
Page 2 of 3
Outcomes and evidence requirements
Outcome 1
Separate a component from a mixture using techniques of solvent extraction.
Range
Soxhlet extractor, separating funnel.
Evidence requirements
1.1
Separation by solvent extraction is carried out in accordance with laboratory
procedures.
1.2
Amount of separated component is determined and is consistent with expected
yield.
Outcome 2
Purify a substance by recrystallisation.
Evidence requirements
2.1
Recrystallisation is carried out and melting point is determined in accordance
with laboratory procedures.
2.2
Yield and purity are calculated and are consistent with sample and technique.
Outcome 3
Describe the use of a phase diagram to predict fractional distillation behaviour.
Range
ideal systems, non-ideal systems.
Evidence requirements
3.1
Solutions are described in terms of Raoult’s Law and azeotropic behaviour.
3.2
Phase diagram is described to predict fractional distillation behaviour systems.
Outcome 4
Separate a component from a mixture by distillation.
Range
simple, fractional.
Evidence requirements
4.1
Separation by distillation is carried out in accordance with laboratory
procedures.
4.2
Amount of separated component is determined and is consistent with expected
yield.
NZQA National Qualifications Services
SSB Code 130301
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
Planned review date
8436 version 5
Page 3 of 3
31 December 2017
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
24 September 1996
31 December 2014
Revision
2
19 February 1998
31 December 2014
Review
3
23 November 1999
31 December 2014
Review
4
18 June 2010
N/A
Rollover
5
27 January 2015
N/A
Consent and Moderation Requirements (CMR) reference
0152
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.
Comments on this unit standard
Please contact NZQA National Qualifications Services nqs@nzqa.govt.nz if you wish to
suggest changes to the content of this unit standard.
NZQA National Qualifications Services
SSB Code 130301
 New Zealand Qualifications Authority 2016