ID 299518706 © Kuprevich | Megapixl.com
Sharing is not just caring, it's also about giving credit - add this image to your page and give credit to the talented photographer who captured it.:
laboratory ph test strips litmus hand medicine table urine gloves research lab liquid health acidity equipment background scientific biology reaction blue technology fluid sample concentration check red glass acid neutral balance value color chemical analysis indicator chemistry science experiment safe strip alkali quality control measurement spectrum closeup verification water