By Kiril Fedorov, Member-at-Large for the GCI
Do you remember the time you had spilled your reaction vessel on the floor, over distilled the solution, broke glassware, or had another accident in the laboratory? Accidents happen to everyone so it is likely to happen to you once or twice in the laboratory. A problem emerges when these incidents become consistent, which is clearly not a green practice for scientists.
For example, let’s say you had a long week of reactions and you destroyed the whole product of your main reaction. This not only means you have destroyed your product, it also means you have wasted the following items: solvents, electrical energy, glassware (if broken or contaminated), single use items (pipette tips, napkins, scintillation vials etc.).
Although accidents are random, their frequency may not be. Do you remember why many of those mistakes happened? There could be many reasons but there is one in particular I would like to highlight. It is your health. First of all people who are healthy are less prone to mistakes and as a result are more efficent.1,2,3 For example when nurses were tested on their work on long shifts, the majority of mistakes that happened were at the end of the shift when they were most tired. You are no different as a scientist, engineer, journalist, editor or any other student. Each morning there is a long line at Tim Hortons for coffee to keep those people who are drinking it alert. Also, many people grab fast food at lunch, eat too fast, and experience a really sleepy afternoon due to high fat load or sugar crash. This leaves people tired, less aware, and as a result prone to mistakes.
Several articles highlight how much loss to the economy is due to poor health. Also people with poor health have to take more medications and get more blood tests, which again is less green.
So what can you do?
The 7 rules of green laboratory:
- Be punctual
If you are in a rush anxiety rises, mineral levels drop 4-7 and mistake levels increase.
When tasks are organized you are less likely to make a mistake and again lower anxiety due to less multitasking.
- Sleep at night
Night is for sleeping for people! Do not stay out late if your experimental work starts early the next day. Only stay awake if you really have to. If you are a night owl, then maybe your schedule is different, but remember if you are consistently tired or need coffee it is not very efficient.
- Eat healthy
No need to be a health lunatic but improving your diet always works to your advantage. Let’s face it: stomach aches, sugar withdrawal, headaches, heartburn or other problems keep you distracted from lab work. You are significantly prone to mistakes.
Get off your seat from the lab every 40-50 minutes and stretch for 10 minutes. Go outside and breathe some fresh air while walking. It will get your blood pumping and get your brain working better. (You might invent a greener reaction)
- Follow safety instructions
Remember it is not just about an instructor or your supervisor who enforce safety rules, but yours and other people’s health. Take your safety seriously! Think of it this way: after all the years of training as a scientist (very costly on chemicals) suddenly your health and efficiency drops and you are about to discover something amazing.
- Have fun
Bored, angry or sad people tend to be more prone to mistakes. (Common sense). If you believe in Karma this is quite self-explanatory. But for those who don’t, think about the times something did not work and likely you would give up or break something. With a little happy thought you can think more clearly and everything gets solved better. Just try it, I am telling you it works.
Here is an example of a reaction and the cost of avoidable mistakes:
Synthesis of Moclobemide
|Compounds used||Amount required (used by an alert student)||Amount used for a tired student
|Amount used for a repeated experiment|
|4-(2aminoethyl)morpholine||0.5 ml||0.5-1||1 ml|
|4-chlorobenzoyl chloride||0.48 ml||0.48-1||1 ml|
|Triethyl amine||20 ml||20 -40||40 ml|
|10% aq ammonia||10 ml||10-20||20 ml|
|Isopropanol||~20 ml||20-40ml||40 ml|
|Other compounds/items||Amount estimates|
|Water (for glassware washing)||1-20 L|
|Electrical power||0.5hr X 4kw+ 0.5 1.5 KW= 2.75 – 5.50 KWh used|
|Acetone||10-30 ml (washing NMR tubes)|
|Magnesium sulfate||A few grams|
1. Health and safety executive survey United Kingdom http://www.hse.gov.uk/statistics/dayslost.htm
2. Tired Doctors More Prone to Errors
Tired Doctors More Prone to Errors
3. Patient care may be at risk from tired staff on long shifts. Nurs Manag (Harrow) 2015;22(5):6. https://hbr.org/2015/08/the-research-is-clear-long-hours-backfire-for-people-and-for-companies
4. Sartori SB, Whittle N, Hetzenauer A, Singewald N. Magnesium deficiency induces anxiety and HPA axis dysregulation: Modulation by therapeutic drug treatment. Neuropharmacology 2012; 62(1):304-312.
5. Uteva AG, Pimenov LT. Magnesium deficiency and anxiety-depressive syndrome in elderly patients with chronic heart failure. Adv. Gerontol. 2012; 25(3):427-432.
6. Grases G, Pérez-Castello JA, Sanchis P, Casero A, Perelló J, Isern B, et al. Anxiety and stress among science students. Study of calcium and magnesium alterations. Magnes. Res. 2006; 19(2):102-106.
7. Singewald N, Sinner C, Hetzenauer A, Sartori SB, Murck H. Magnesium-deficient diet alters depression- and anxiety-related behavior in mice – Influence of desipramine and Hypericum perforatum extract. Neuropharmacology 2004; 47(8):1189-1197.