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define some precautions for measurement of ph1 never touch the membrane of the glass electrode with anything else except soft tissue paper since it
define procedure for measurement of phto ensure reliability of the ph readings you should first calibrate the ph meter you should adjust the ph meter
define reagents for measurement of phbuffer solutions of ph 4 ph 7 and ph 918 for calibration and an unknown solution ie solution of unknown phyou
define principle behind the functioning of a ph meterprinciple hydrogen ions in solution like other ionic species conduct an electric current when a
what is a ph metera ph meter is a device used for measuring ph of any unknown solution it is composed ofa a reference electrodeb glass electrode
define methods for determining phthere are two general methods for determining ph of a solution one is the colorimetric method and the other most
define the buffer capacity - nutritional biochemistrybuffer capacity can be defined as the capacity of a solution to resist changes in ph on the
define some example of acidic and basic bufferfrequently used example of acidic and basic buffer includes- acidic buffer a mixture of ch3 cooh acetic
how buffer solution can be prepareda buffer solution can be prepared to have a desired value of ph by controlling the amount of acid and its salt in
define buffers and buffer solutionssolutions containing both weak acid and their salts or solutions containing weak hydroxides and their salts are
explain about the ph - nutritional biochemistryyou have already studied about ph in your undergraduate years and know what it means yes
define glass photo-emissive tubesglass photoemissive tubes are those which consist of a curved metal cathode coated with a photosensitive material
define barrier layer cells photocellsthey are the very simple of the detectors it contains the bottom support layer of conductive metal like iron a
explain the photosensitive detectorsa wide range of detectors varying in senstivity and cost are available they contain a light sensitive surface
explain the advantages of double beam methodthe double beam method has advantage over single beam as it automatically corrects for the change in
explain the types of double beam systemsfollowing are types of double beam systemsa dual beam in space typeb dual beam in time typein type a separate
define single beam and double beam optical pathin simpler instruments a single beam of light passes through the cuvettes and reaches the detector
define essential parts of photocolorimeter - sample cuvettesfor accurate and precise reading cuvette must be transparent clean devoid of any
define essential parts of photocolorimeter - monochromatorsthis is a means of selecting a sufficiently narrow waveband early colorimeters used glass
define essential parts of photocolorimeter - light sourcethe light source is usually a tungsten lamp for wavelength in the visible range 320-700 nm
define instrument for absorbed radiation - spectrophotometerin contrast to colorimeter spectrophotometer is an instrument that is capable of
define instrument for measurement of absorbed radiation-colorimeterthe simplest types of photometric instruments are designed for measurements in
define instrument for measurement of absorbed radiationa photometer this is an instrument which it designed to measure the intensity of the beam of
define type of instruments used in spectral techniquesa wide range of instruments are available possessing a combination of features but there is no
calculate the concentration of unknown solution from standard curvei first take different volume of standard solution say 02 04 06 08 10 ml and then