Microscale chemistry is the scaling down in size of practical chemistry. Microscale activities require using smaller quantities or volumes of chemicals and also simpler equipment, such as spotting plates, multiwell (culture) plates, laminated grid sheets, and smaller test tubes. Drops rather than millilitres of reagents and a few grains rather than a few grams of a solid chemical are generally used. Sometimes it may mean working in a drop of water on an acetate sheet. The chemical waste for these activities is not significant and most can be wiped up with paper towel or tissue and disposed of in the general waste.
Many procedures require some dexterity, so it may be necessary to start with some simple activities first and a skills assessment of the students might be required.
Science ASSIST recommends the use of microscale techniques in chemistry where applicable and outcomes are not compromised. Microscale chemistry has the benefits of quicker reaction times and:
- Reduced materials
- Reduced costs
- Reduced risk - there is less contact with hazardous chemicals
- Reduced chemical waste
- Reduced preparation and clean-up time
- Reduced reliance on traditional glassware.
- Reduced storage requirements.
About microscale chemistry:
- ‘Microscale chemistry’, Education in chemistry website, https://eic.rsc.org/feature/microscale-chemistry/2020192.article (March 2007)
- ‘Microscale Chemistry from the UK’, Microchemuk website, https://microchemuk.weebly.com/4-about-microscale.html (Updated January 2020)
- ‘Microscale chemistry revisited’, Education in chemistry website, https://eic.rsc.org/feature/microscale-chemistry-revisited/2020193.article (May 2012)
- ‘What is Small-Scale Chemistry?’ National Small-Scale Chemistry Center website, http://www.smallscalechemistry.colostate.edu/what_is_ssc.html (Accessed May 2019)
- ‘Why Small-Scale Chemistry?’ ’ National Small-Scale Chemistry Center website, http://www.smallscalechemistry.colostate.edu/why_ssc.html (Accessed May 2019)
Examples of microscale chemistry activities:
Royal Australian Chemical Institute:
‘Chemical Education Group’, RACI website, https://www.raci.org.au/branches/vic-branch/chemical-education-group586 (Accessed 15 May 2019) Scroll down the page to find ‘An Effective Way to Introduce Many Chemical Concepts Using a Stereomicroscope’
Royal Society of Chemistry:
‘Microscale Chemistry: experiments in miniature’, Learn Chemistry website, http://rsc.org/learn-chemistry/resource/res00001976/microscale-chemistry-book (Accessed May 2019) A book is available for purchase or scroll down the page to access the links to download the experiments for free.
UK STEM Learning Centre:
‘Microscale Chemistry’, STEM learning website. https://www.stem.org.uk/resources/collection/4034/microscale-chemistry (Accessed May 2019) This has a number of activities from the Royal Society of Chemistry and requires the user to create an account to access resources
Worley, Bob, CLEAPSS Advisor:
Youtube videos, https://www.youtube.com/channel/UCPotDWzaKehdDRW5Tl71PPw/videos. This has several examples of microscale chemistry, many of which, Bob presented at CONASTA 67 in Sydney 2018. In particular view the microscale version of elephant’s toothpaste, i.e. Mouse’s toothpaste with an interesting addition using a glowing splint; and many examples of microscale chemistry in a drop of water.
Other examples of micro and small scale chemistry activities
Buthelezi, Thandi; Dingrando, Laurel; Hainen, Nicholas; Wistrom, Cheryl and Dinah Zike. nd. Chemistry small-scale laboratory manual – Student Edition. McGraw Hill Glencoe: New York. EPDF website https://epdf.tips/queue/chemistry-small-scale-laboratory-manual.html (Accessed May 2019)
Mattson, Bruce and Michael P. Anderson. 2017. Microscale Gas Chemistry, 2017 Web Version, Creighton University website, http://mattson.creighton.edu/Microscale_Gas_Chemistry.html (Accessed May 2019) [Answer edited 12 June 2019 to include this example)
‘Small Scale Selector Page’, This has 80 links to small scale activities. University of Nebraska-Lincoln website, https://web.archive.org/web/20191021113110/http://dwb5.unl.edu/CHEM/Smal... (Original resource no longer available, this version provided by the Internet Archive April 2021)
Note: Science ASSIST has not trialled these activities and the onus is upon the school to determine the suitability of the activity and to conduct their own risk assessment and implement relevant safety procedures.