Green chemistry metrics measures efficiency in a chemical process. Having made a green chemistry improvement to a chemical process, it is important to be able to quantify the change. By quantifying the improvement, there is a tangible element or benefit from the new technology introduced. This is likely to aid the communication of the work and potentially facilitate the transfer to industry. For a non-chemist the most attractive method of quoting the improvement would be a decrease of £X per kilo of compound Y. This however is an oversimplification and does not allow a chemist to visualise the improvement made or make allowance for toxicity/hazard. For yield improvements and selectivity increases, simple percentages are suitable, but this simplistic approach may not always be appropriate. For example, when a highly pyrophoric reagent is replaced by a benign one, a numerical value is difficult to assign but the improvement is obvious, if all other factors are similar.
Numerous metrics have been formulated over time and their suitability discussed at great length.
The problem observed is that the more accurate and universally applicable the metric devised, the more complex and unemployable it becomes. A good metric must be clearly defined, simple, measurable, objective rather than subjective and must ultimately drive the desired behavior.
Other articles related to "green chemistry metrics, metric":
... The EcoScale is a recently developed metric tool for evaluation of the effectiveness of a synthetic reaction ...
Famous quotes containing the words green and/or chemistry:
“The Mediterranean has the color of mackerel, changeable I mean. You dont always know if it is green or violet, you cant even say its blue, because the next moment the changing reflection has taken on a tint of rose or gray.”
—Vincent Van Gogh (18531890)
“For me chemistry represented an indefinite cloud of future potentialities which enveloped my life to come in black volutes torn by fiery flashes, like those which had hidden Mount Sinai. Like Moses, from that cloud I expected my law, the principle of order in me, around me, and in the world.... I would watch the buds swell in spring, the mica glint in the granite, my own hands, and I would say to myself: I will understand this, too, I will understand everything.”
—Primo Levi (19191987)