Mettler automatic thermal instruments give you 1. melting and boiling points objectively 2. precise control in thermal microscopy 3. dropping points electronically shows the temperature of the sample chamber. The indicators below it record the three individual temperature events you selected. These studies in thermal microscopy can be conducted at the same five heating rates available with the FP-1.
cator
Melting and Boiling Points by the Numbers
melting/boiling IOur ment, the Mettler
point instruFP-1, auto-
melting and boiling point tests and displays results on its digital readout panel. All you do is (1) select matically
runs
heating rate, (2) insert the sample, (3) press the "start" lever, (4) read the ob-
a
HEATING
the readout panel. You do not have to make subjective choices of the melting or boiling temperature, nor must you "eyeball" and apply corrections to mercury-in-glass thermometers.
jective results to 0.1°C
BULB
a
____COLL ECTIVE_SL_E EV E
reproducibility of
Take Three You can make three melting point determinations simultaneously, thus identifying crystalline compounds by mixed melting point determinations in one rapid operation. Used with a standard time-base recorder, the Mettler FP-1 can provide curves showing changes in light transmission as sample temperature increases. This technique is
Digital readout of temperatures
M
Determines dropping points electronically
where a precision of 0.5°C is adequate, and 0.2°C/min for precise deto
CUP PHOTO CFLLS
4-
or
±0.1°C.
I
SAMPLE
Up to 50 mpd/hr From 30 to 50 melting point determinations can be done per hour with the FP-1, depending on the heating rate. Any of five heating rates can be selected: 10°C/min for quick survey work; Io, 2°, 3°C/min for routine tests terminations
FURNACE
RT-THERMOM ETER
on
Pushbutton control of thermal events
useful in measuring melting ranges; in the construction of phase diagrams; and in analyzing the purity of compounds.
Thermal Microscopy For thermal microanalyses, attach the Mettler FP-2 to your microscope and take fingertip command of the thermal process. You never lose visual contact with the sample because the FP-2 has a pushbutton controller to increase, decrease or maintain sample temperature at a precise value. With the same controller you can record the exact temperature at which any three thermal events occur. These include beginning of melt, end of melt, phase change, or any of several conditions in the crystallization process. Temperatures are recorded in digital form on an indicator panel. The top digital indi-
2
Circle No. « on Readers’ Service Card
Good at the First Drop The Mettler FP-3 automatically determines dropping points of lubricating greases, ointments and edible fats in just a few minutes. The procedure conforms to the ASTM D-566 and D-2265 test specifications. When the first drop of grease to fall from a heated sample cup crosses a light beam, the dropping point is registered on the digital readout panel. The FP-3 is simple to operate: select desired temperature program, put sample cup in furnace and read dropping point. Up to 12 dropping point determinabe conducted per hour tions can over a temperature range of 20°C to + 300°C. Heating rates are also selectable and include 0.2, 1.0, 2.0, 3.0 and 10.0°C/min rates. Accuracy of temperature indication at a heating rate of 0.2°C/mm is ±0.1°C. Reproducibility (at 0.2°C/mm) is ±0.2°C. —
If you want to take the subjectivity out of your melting, boiling, or dropping point determinations, ask Mettler
for FP-1 and FP-3 literature. Need precise control in your thermal microanalyses? Request literature on the
Mettler FP-2. Or request a demonstration or trial in your own lab of these instruments. Write Mettler Instrument Corporation, 20 Nassau Street, Princeton, New Jersey 08540.
7/LtLfZlLiLZ_.
ANALYTICAL CHEMISTRY, VOL. 42, NO. 4, APRIL 1970
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103 A
