Technicon Instruments

In many years of experience in the NIR applications department at Technicon Instruments, there was about an hour and a half available to teach both theory and practice of calibration to each group of new users the rest of the training time was spent teaching the students how to set the instrument up, prepare samples, take reproducible readings,... 

In the middle of the 1970s, Technicon Instruments had Dickey-John produce a filter instrument for them, named the InfraAlyzer. The first, numbered 2.5, featured dust proof optics and internal temperature control. This improved stability and ruggedness made it practical for consumers to operate. Technicon also introduced the gold plated integrating sphere. 

The determination of the orthophosphate was carried out by using the automated systems described by the Technicon Instruments Corporation. The manifolds used are shown in Fig. 12.3. The procedures referred to below as methods I and II are Technicon industrial methods Nos. 94-70W and 155-71W, respectively. Method I includes ascorbic acid alone for the reduction of the molybdophosphoric acid whereas in method II the mixed reagents ascorbic acid, sulphuric acid, ammonium molybdate and antimony potassium tartrate are used. Method I is intended for use for high levels of phosphorus (up to lOpg ml4) and method II for low levels (less than 0.5pg ml4). The wetting agent (Levor IV) used in order to obtain a smooth bubble pattern, is present in the ascorbic acid reagent line for method I whereas it is added externally Fig. 12.3) in the water line (0.5pg ml4 of Levor) in method II. 

Fig. 4.8 Automatic system designed by Bums [27] for the analysis of vitamin tablets. Reproduced with permission of the Technicon Instrument Co. Ltd.

Bran Luebbe (formerly Technicon Instruments), Werkstrasse 4, W-22844 Norderstedt, Germany. 

SpinOff Technical Systems, 1 The Avenue, Hadleigh, Benlleet, Essex SS7 2DJ, HK. Technicon Instruments (see Bran Luebbe). 

David Zelmanovic, Technicon Instruments Corporation, Tarrytown, NY, Automated Instrumentation Hematology Edward G/Zey, Hoechst Celanese Corporation, Corpus Christi, TX, Esterification... 

Technicon Instruments Corp. (1977) Digestion and Sample Preparation for the Analysis of Total Kjeldahl Nitrogen and/or Total Phosphorus in Food and Agricultural Products using the Technicon BD-20/40 Block Digestor, Technicon Industrial Method No.369-75A, Technicon Instruments Corporation, New York, USA. 

Autoanalyzer, Technicon Instruments Corp, Chauncey, New York. 

Fig. 16. Autoanalyzer. The diagram indicates the six component parts of the Autoanalyzer (Technicon Instruments Corp.) which are from right to left sample turntable, pump, dialyzer in constant temperature water bath, heating bath, dualbeam flow colorimeter, and recorder. The reagent bottles would normally be placed adjacent to the pump.

Technicon Instruments Corporation Ford Motor Company... 

Since 1970, new analytical techniques, eg, ion chiomatography, have been developed, and others, eg, atomic absorption and emission, have been improved (1—5). Detection limits for many chemicals have been dramatically lowered. Many wet chemical methods have been automated and are controlled by microprocessors which allow greater data output in a shorter time. Perhaps the best known continuous-flow analyzer for water analysis is the Autoanalyzer system manufactured by Technicon Instruments Corp. (Tarrytown, N.Y.) (6). Isolation of samples is maintained by pumpiog air bubbles into the flow line. Recently, flow-injection analysis has also become popular, and a theoretical comparison of it with the segmented flow analyzer has been made (7—9). 

In 1966 Block et al. (B3, B4) published a modification of the Zlatkis et al. and Levine and Zak technics. Manually prepared serum extracts are added to a stream of preheated color reagent, and the mixture is then passed through three mixing coils connected in series. The absorbance is determined at 550 mju, using a 15-mm tubular fiow cell. This technique is currently recommended as the total cholesterol procedure by the Technicon Instruments Corp. (C4, C5). 

C3. Cholesterol 3-60, AutoAnalyzer—Method File. Technicon Instruments Corp., Chauncey, New York, 1960. 

Another important general finding has been that the introduction of work-simplified techniques and of automatic methods of analysis has not improved the results of interlaboratory surveys as much as might have been forecast. Some of the main differences between the analytical practice at the time of the earlier trials (Bl, WIO, W16) and the most recent studies (e.g., G4, H5, T4) have been the simplification of manual methods and the introduction of the AutoAnalyzer (Technicon Instruments Corp.,... 

Fig. 11. Technicon 12-channel sequential multiple analyzer (SMA-12). The instrument illustrated is the Survey model equipped with machine-readable (IBM punch card) sample identification (by courtesy of Technicon Instruments Co. Ltd., Chertsey, Surrey, England).

FIGURE 2.3 A first-generation single-channel AutoAnalyzer (Technicon Instruments, circa 1957). Reproduced with permission of Hindawi Publishing Corporation from "R. Stanley, Journal of Automatic Chemistry, 6 (1984) 175". 

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