- Do powered toothbrushes contaminate toothpaste with metals?Phillip J Colquitt
Sci Total Environ 289:25-32. 2002..Discolouration of toothpaste slurry, as a useful indicator of metal abrasion, was limited to one toothpaste brand, and not useful across brands...
- Electronic sphygmomanometers: are they a source of mercury in hospitals?Phillip J Colquitt
Hypertension 39:e21. 2002