acid-base indicator

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Related to PH indicator: PH meter
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Noun1.acid-base indicator - an indicator that changes color on going from acidic to basic solutionsacid-base indicator - an indicator that changes color on going from acidic to basic solutions
phenolphthalein - a laxative used in many preparations under various trade names; also used as an acid-base indicator in titrations involving weak acids and strong bases because it is brilliant red at high alkalinity and colorless below pH 8
congo red - a red-brown azo dye especially as a chemical pH indicator (congo red is red in basic and blue in acidic solutions)
methyl orange - an azo dye used as an acid-base indicator; used for titrations involving weak bases
indicator - (chemistry) a substance that changes color to indicate the presence of some ion or substance; can be used to indicate the completion of a chemical reaction or (in medicine) to test for a particular reaction
litmus, litmus test - a coloring material (obtained from lichens) that turns red in acid solutions and blue in alkaline solutions; used as a very rough acid-base indicator
bromophenol blue, bromphenol blue, tetrabromo-phenolsulfonephthalein - a dye used as an acid-base indicator
bromothymol blue, bromthymol blue - a dye used as an acid-base indicator
References in periodicals archive ?
products including but not limited; bile bags and associated tubing, enteral feeding syringes, tubing, ph indicator paper, extension & feed sets, buttons, nasal anchoring systems, enteral drainage bags and associated consumables, giving sets, feeds, adapters and nutritional supplements.
The carbon dioxide produced diffuses into a pH indicator reagent inside the inner tube forming carbonic acid which changes the pH and the color of the indicator solution.
Summary: The polymer films under investigation include poly (vinyl alcohol) in a combination with mixture of two dyes, namely, 2,6-dichlorophenol indophenol sodium salt (DCP), and tetrabromophenol blue (TBPB) as pH indicator in presence of various chloral hydrate concentrations.
To evaluate pH effect on seed germination, different concentration of MS medium were made by adding different volumes (75, 200 and 375 uL) of 50 mM CysNO solution to 25 mL of autoclaved MS and pH was checked with pH indicator paper (Advantec, UNIV) before the medium solidified.
These immobilised algae balls are then standard units of photosynthesis and can be used in conjunction with a pH indicator to measure rates of photosynthesis.
Scanning electron microscopy (SEM) images of pH indicator containing micro-particles are shown in Figure 3.
Acid formation associated with carbohydrate metabolism in Enterobacteriaceae can be observed through the color change of a pH indicator.
Enzymatic hydrolysis of imipenem and subsequent colour change of a pH indicator (phenol red and bromothymol blue respectively).
2], which will change the pH of the disc, which changes the color of the pH indicator in the disc.
The urine dipstick test for protein uses a pH indicator and is not affected.