Mettler automatic thermal instruments give you 1. melting and boiling points objectively 2. precise control in thermal microscopy 3. dropping points electronically cator 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.
Melting and Boiling Points by the Numbers Our melting/boiling point instrum e n t , the M e t t l e r F P - 1 , a u t o matically runs melting and boiling point tests and displays results on its digital readout panel. All you do is (1) select a heating rate, (2) insert the sample, (3) press the "start" lever, (4) read the objective results to 0.1 °C on the readout panel. You do not have to make subjective choices of the melting or b o i l ing temperature, nor must you "eyeb a l l " and apply corrections to mercury-in-glass thermometers.
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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 w o r k ; 1°, 2°, 3°C/min for routine tests or where a precision of 0.5°C is adequate, and 0.2°C/min for precise determinations to a reproducibility of ±0.1°C. Take Three You can make three melting point determinations simultaneously, thus identifying crystalline compounds by mixed melting point determinations in one rapid operation. Used w i t h a standard time-base recorder, the Mettler FP-1 can provide curves showing changes in light transmission as sample temperature increases. This technique is
Determines dropping points electronically
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 determinations can be conducted per hour 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/min is ±0.1°C. Reproducibility (at 0.2°C/min) is ±0.2°C.
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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 w i t h the sample because the FP-2 has a pushbutton controller to increase, decrease or maintain sample temperature at a precise value. W i t h 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-
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Digital readout of temperatures
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 o w n lab of these instruments. Write Mettler Instrument Corporation, 20 Nassau Street, Princeton, New Jersey 08540.
Mettler ® Circle No. 72 on Readers' Service Card
ANALYTICAL CHEMISTRY, VOL. 42, NO. 9, AUGUST 1970
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