Problems with abnormal liquid colority
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The test data for metal elements in a liquid are as follows: Sample name: CrCuFeMgMnNi. LO.1 (ppm): 0.11, 0.10, 0.04, 0.05, 0.01, 0.04. LO.2 (ppm): 0.15, 0.01, 0.04, 0.04, 0.01, 0.10. Adding sulfuric acid or KOH causes an increase in the color intensity of this liquid. Is there anyone among you who can help determine the possible reasons for this? Due to limitations in detection techniques, the exact content of other organic compounds and any potential interference cannot be determined, so no data can be provided. If any of you have experience with similar organic substances changing color when exposed to acids or bases, please share it. Just providing some ideas will suffice; thank you in advance.
Chromium sulfate is green in acidic conditions, ferric sulfate is yellow, iron hydroxide is reddish-brown as well, and chromium hydroxide is also green