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Spectrophotometers for colorimetric analysis
UV200RS
spectrophotometer - top-grade pro unit with UV and VIS spectrum: 200 to
1000 namometers (click link for product details).V200RS spectrophotometer - professional unit with visible spectrum: 320 to 1000 nanometers (click link for ordering and details).
V325-ED spectrophotometer - discontinued
V325XS spectrophotometer- discontinued
A=Absorbance, a unitless measure
%T=Transmittance expressed as a percentage=100% times the reading given by the spectrophotometer
b=Path length in centimeters (ideally, use a cuvette where b=1)
c=Concentration of substance in moles per liter
epsilon=Molar absorptivity of substance in liters per mole-centimeter
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