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when measured with a 100-cm cell a 750 x 10-5 m solution of species a exhibited absorbances of 0155 and 0755 at 475 and
aluminum forms a 11 complex with 2-hydroxy-lmiddotnaphthaldehyde p-methoxyhenzovlhvdraxonal which absorbs uv radiation
a 365-g petroleum specimen was decomposed by wet ashing and subsequently diluted to 500 ml in a volumetric flask cobalt
mixing the chelating reagent b with niii forms the highly colored nib22 whose solutions obey beers law at 395 nm over a
equations for the chemiluminescence determination of so2 are given on page 425 derive an expression for the
the following volumes of a standard 100 ppb f solution were added to four 1000-mlaliquots of a water sample 000 100 200
the following lifetimes were measured for the chloride quenching of quinine sulfate given in example 15-1 the
the reduced form of nicotinamide adenine dinucleotide nadh is an important and highly fluorescent coenzyme it has an
a 250-ml aliquot of an aqueous quinine solution was diluted to 500 ml and found to have an absorbance of 0656 at 348 nm
a 05990-g pesticide sample was decomposed by wet ashing and then diluted to 2000 ml in a volumetric flask the analysis
the accompanying data 100-cm cells were obtained for the spectrophotometric titration of 1000 ml of pdii with 244 x
ironii ions catalyze the oxidation of luminol by h2o2 the intensity of the resulting chemiluminescence has been shown
the determination in problem 15-9 was modified to use the standard-additon method in this case a 4236-g tablet was
quinine in a 1664-g antimalarial tablet was dissolved in sufficient 010 m hci to give 500 ml of solution a 2000-ml
the volumes of a solution containing 110 ppm of zn2 shown in the table were pipetted into separatory funnels each
ironiii reacts with thiocyanate ion to form the red complex fescn 2 sketch a photometric titration curve for feiii with
the firs ftir instruments used three different interferometer systems briefly describe how it has been possible to
it was stated that at room temperature 25degc the majority of molecules are in the ground vibrational energy level v0a
if a michelson interferometer has a mirror velocity of 100 cms what will be the frequency at the transducer due light
sulfur dioxide is a nonlinear molecule how many vibrational modes will this compound have how many ir absorption bands
a the ir spectrum of gaseous n2o shows three strong absorption bands at 2224 cm-1 1285 cm-1 and 2089 cm-1 in addition
explain the difference between a fluorescence emission spectrum and a fluorescence excitation spectrum which more
an empty cell exhibited 115 interference fringes in the region of 1050 to 1580 cm-1 what was the path length of the
the ir spectrum of co shows a vibrational absorption band centered at 2170 cm-1a what is the force constant for the co
a consider an atr experiment with a sample having a refractive index of 103 at 2000 cm-1 the atr crystal was agcl with