acid-base indicator

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Related to PH indicator: PH meter

acid-base indicator

n.
A substance that indicates the degree of acidity or basicity of a solution through characteristic color changes.
References in periodicals archive ?
The RightSpot pH Indicator and RightSpot Infant pH Indicator are small, non-invasive devices that are used to verify gastric acidity to avoid misplacement of NG feeding/suction tubes and percutaneous endoscopic gastrostomy (PEG) tubes.
Such difference in the quantity of biogas due to the pH indicator, a mixture of protein, fat and refined carbohydrates content acetogenesis and methanogenesis and the density of bacteria, microbial population as well as the release of biogas could be influenced by macronutrients carbon, nitrogen, phosphorus and sulphur content of the recycled biomass.
Recommended methods of making sure tubes are correctly placed include measuring the pH levels of stomach contents using pH indicator strips, or in some cases X-rays.
The pH indicator dyes dissipate within 30 minutes once applied and are available in pink and blue.
For liquids such as water, some juices, soft drinks and pickling brines, we have found that pHydnion[R] Micro Brilliant dipsticks, Whatman[R], or EM ColorpHast[R] pH indicator papers are an ideal tool.
Because the bacteria in question raise pH of acid media, use of a pH indicator was evaluated to determine if an acid to alkaline color change could serve as presumptive presence of these isolates in contaminated plant and food samples.
They coated a piece of aluminum alloy with paint containing phenolphthalein, a common pH indicator, and soaked it in salt solution to promote corrosion.
FTC tags use a pH indicator composition in buffered solution, with at least one inorganic ion and a control substance in suitable concentration to effect changes in ionic strength and proton concentration of the frozen pH indicator, so that color changes occur at the desired temperature.
toothpastes (use one brand without baking soda as a control) * universal pH indicator paper * test tubes * various liquids
To measure acidity, buy pH indicator strips at a scientific supply store.
This procedure enumerates lactic acid bacteria in food and environmental samples by integrating a unique combination of the 3M(TM)Petrifilm(TM)Aerobic Count Plate, a pH indicator and MRS (deMan, Rogosa and Sharpe) media.