Product Overview

HI731335 is a replacement cap for the glass cuvettes used with the HI96 series portable photometers. Each cap has a locking index tab that ensures the cuvette is inserted into the photometer in the same position. The cap also blocks any light that would interfere with the optical measurement. HI731335 includes 4 caps.

• Locking index tab for correct alignment in the photometer

• Blocks light to prevent stray light from entering

• When using a photometer, it is important to insert the cuvette in the same position when performing the blank measurement (zero) and reading the reacted sample, so as to maintain a consistent path length according to the Beer-Lambert law (see below). The cap of HI731335 has a locking index tab that fits the HI96 series photometers to ensure the cuvette is inserted in the same orientation every time.

• The amount of radiation absorbed is given by the Beer-Lambert law:

• A = log Io/I

• Absorbance is also given by: A= ελ • C • l where:

• A is a dimensionless number

• ελ proportionality constant, called the molar extinction coefficient or molar absorptivity; it is a constant for a given substance, provided that temperature and wavelength are constant [L/(mol•cm)]

• C is the concentration of the substance (mol/L)

• l is the optical distance the light travels through the sample (cm)

• HI731335 is a replacement cap for the glass cuvettes supplied with all HI96 meters