Another "walk-away winner from Thomas
The Model 55 AUTOMATIC PRINTOUT TITRATOR The way to do it is to load the sample rack, push the button and walk away.
Walking away from a task CAN mean getting it done— with Thomas "walk-away" products like the Model 55 Titrator, the kind of instruments that release an analyst from repetitive, mechanical chores—to do more important work.
The Model 55 starts titrating Sample No. 1, and does not stop until it finishes Sample No. 20. All samples are titrated to same endpoint; within ± 0 . 0 2 pH unit or ± 0 . 5 mv. Titrant volume for each sample is recorded, with sample number, on paper tape printout. Volumes are printed to nearest 0.01 ml, between 00.00 and 09.99 ml, sample numbers as 3 digits between 000 and 999.
The job here is to do 20 titrations as quickly as possible, with high precision and absolute uniformity of endpoint.
The Model 55 uses 50 ml test tubes as titration vessels —they're cheaper, easier to clean and store than beakers. The high precision of the 10 ml buret saves expensive standardized reagents; you are now probably using three times as much. If you think you are locked-in on "standard" methods, methods which specify sample volumes and titrant minima imposed by limitations of out-dated volumetric glassware and visual endpoint determination, we'll be glad to show you how you can enjoy the benefits of our "walk-away" titrator w i t h o u t loss of analytical accuracy. Please ask us. If you are wondering about cost, we think you'll find that the price of the complete Model 55 Titrator is less than the annual cost of 50 manual titrations per day in your laboratory. Ask us about this, too.
Sample number and titration results issue on tape as shown above. The digital register indicates the same information for sample last titrated and indicates progress of the series.
ARTHUR H. THOMAS COMPANY •
P.O. Box 7 7 9 • Philadelphia, Pa. 19105
CIRCLE 191 ON READER SERVICE CARD
82 A
·
ANALYTICAL CHEMISTRY, VOL. 4 4 , NO. 7, J U N E 1 9 7 2
