gloved hand holds neutral litmus paper on test tube with sample of natural drinking water over bottle on light desk

---

Size: 5700px × 3800px
Photo credit: © Valery Voennyy / Alamy / Afripics
License: Royalty Free
Model Released: Yes

Keywords: acidity, bottle, check, chemical, chemist, chemistry, clean, desk, drinking, equipment, exam, glass, glove, gloved, hand, hold, horizontal, indicator, investigation, laboratory, level, light, liquid, litmus, measurer, measuring, meter, natural, neutral, paper, ph, pink, plastic, quality, research, researcher, sample, science, scientific, scientist, study, studying, table, test, test-tube, testing, tool, tube, view, water