24 A
ANALYTICAL
CHEMISTRY
CHEMICALS Selected Reagents Stand ardized for PARR Bombs and
Sodium Peroxide, calorific grade, for all peroxide bomb tesfs. Minimum assay, 96.0% N a 2 0 2 . Negli gible sulfur. Potassium Perchlorote, accelerator for peroxide bomb tests, dried and screened through 100 mesh. Negligible sulfur. Benzoic Acid, thermal value standard for oxygen bomb calorimeters. Also, addition agent for peroxide bomb tests. Comes in powder or pellet form.
PARR INSTRUMENT EST. 1899
LUMETRON
•
Calorimeters
Barium Chloride, siied crystals, 20 to 30 mesh for rapid sulfur determinations with PARR Turbidimeter. Gelatin Capsules, for holding liquid samples in combustion bombs. Heat of combustion and sulfur content reported on label.
Order from your PARR Dealer or write to the factory for details and standard package prices.
CO., MOLINE, ILLINOIS
MAKERS OF CALORIMETERS AND PRESSURE REACTION EQUIPMENT
Photoelectric Colorimeter MOD. 401
for accuracy, ease, and speed of operation in colorimetric and turbidimetric analysis With built-in stabilizer of high efficiency For use with tubes and precision cuvettes With sliding tube carrier and sealed photocell For operation from power line and battery In rigid metal housing with Plexiglas cover
For Production Control Analytical Laboratories Educational Institutes Write for Bulletin 4409 to
Price, complete with 6 color filters $158.—
PHOTOVOLT CORP. 95 Madison A v e .
N e w York 1 6 , Ν . Υ .
