chromatography
part of speech
noun (chromatography — uncountable)
meaning for a pupil
1) (science) A way of separating a mixture into the different substances in it, by letting a liquid or gas carry them along paper or another material at different speeds. tree →
2) Paper chromatography is a simple school experiment that shows the different colours hidden in an ink. tree →
sense in the lessons
In science lessons you draw a felt-tip dot on filter paper, dip the edge in water, and the water carries the colours up at different speeds, splitting black ink into blue, yellow and pink. Scientists and police labs use chromatography to test food, medicines and crime evidence. The result is a «chromatogram».
examples
- In chromatography, we saw black ink split into blue and orange. tree →
- The water climbed up the paper and carried the colours with it. tree →
- Police labs use chromatography to test evidence. tree →
- Chromatography shows that one ink can contain many colours. tree →
- Our chromatography experiment used coffee filter paper. tree →
- Draw the line in pencil, because pencil does not run in chromatography. tree →
note
Say «kroh-muh-TOG-ruh-fee». chroma (colour) + graphy (writing). Uncountable. Use a pencil line for the start, because pencil (graphite) does not dissolve.
Trees and pragmatics
Every meaning and example of «chromatography» parsed by Mova, each sentence with its dependency tree and frames.