Tracor
if you don't have Tracor chromatographs in your lab... Gas Chromatography A Tracor 560 gas chromatograph equipped with the New HALL® 700A Electrolytic Conductivity Detector and the Tracor 702 Nitrogen-Phosphorous Detector can do specific analysis of almost any class of compounds. 7 0 0 A HALL® Electrolytic Conductivity Detector The new HALL® 700A is more compact and up to 10 times more sensitive than its predecessors. It incorporates such new features as • An automatic solvent venting valve and a differential conductivity cell for improved long term stability • A new microreactor platinum resistance heater/sensor which allows for faster and more accurate temperature control of the reaction zone • A combustion tube of small I.D. nickel tube which gives more efficient conversion of the combusted compounds The 700A also incorporates a bipolar-pulsed excitation signal across the cell electrodes which eliminates the non-linearity, cell heating and capacitive noise problems previously associ ated with other conductivity measurements. 7 0 2 Nitrogen-Phosphorous Detector The Tracor 702 Nitrogen and Phosphorous Detector has several outstanding features over other available nitrogen phosphorous detectors. First, the source desensitizer allows the user to in ject chlorinated solvent derivatizingagents and ordinary sol vents without degenerating or destroying the source. Second, the source is electrically heated/precision temperature con trolled for better source life even in the event of column flow loss . Next, source alignment is quick and easy with alignment tool provided. What can you do with the Tracor 560/700A/702 element selective chromatograph? • Specific detection of halogen, nitrogen or sulfur com pounds over a 104 linear range with the HALL® 700A Electrolytic Conductivity Detector.
702NPD Phosphorous Instrument: Tracor 5 6 0 / 7 0 2 NPD Peak 1 2 3 4 5
700AHECD Specific Sulfur Mode
• Specific detection of nitrogen and phosphorous com pounds with easy detector operation using the 702 Nitrogen-Phosphorous Detector.
Contact Tracor for Chromatographic
Tracor Instruments
Tracor. Inc.
Instrument: _ Tracor 5 6 0 / H A L L ^ 700A M o d e : Nitrogen
Peak
Peak
1 2 3 4 5 6
Identity Thimet 2.2 n g Malathion 4.5 n g Parathion 4.5 n g Captan4 5 n g Ethiom4.5 ng Trithion 4.5 n g
6500 Tracor Lane
CIRCLE 202 ON READER SERVICE CARD
1062 A · ANALYTICAL CHEMISTRY, VOL. 51, NO. 11, SEPTEMBER 1979
Specific Nitrogen Mode Nitrosamines
Instrument: Tracor 560/HALL® 700A M o d e : Sulfur
The 700A detector provides improved linearity and selec tivity for sulfur over the FPD.
Conditions.
Identity T h i m e t — 1 . 8 n g . ea. Malathion—3.6 ng. ea. Parathion—3.6 n g ea. Ethion—3.6 ng. e a . Trithion—3.6 ng. e a .
1 2 3 4 5 6
Identity N-Nitrosodimethylamine N-Nitrosodiethylamine N-Nitrosodipropylamine Ν -N i trosod ι buty lam i ne N-Nitrosopiperidine N-Nitrosopyrrolidine
Chromatogram of 1 ng. each of nitrosamines listed. 250 picograms of the same com pounds are clearly measurable.
Austin, Texas
TELEX 77-6414
Chromatography
look at the chromatography capability you are missing! Liquid Chromatography Tracor's 900 Series Liquid Chromatograph provides selective detection of halogen, nitrogen and sulfur compounds in liquid chromatography using the Tracor 965 Photo-conductivity detec tor. This detector, like the 700A for gas chromatography, uses a bipolar pulsed signal across the differential cell electrodes to give increased linearity and sensitivity. Chromatograms below illustrate its operation. Another Tracor designed product, the Model 970A Variable Wavelength Absorbance Detector, includes both deuterium and quartz iodide sources for absorbance measurements over the entire UV-visible spectral range—190nm-650nm. This type of detector has become the most generally used detector in the field of high pressure liquid chromatography. The 970A features fiber transfer optics, a holographically ruled grating for low noise, high energy operation even in the far UV. This modern optical technology has produced a simple design resulting in maximum energy with no cell alignment requirements. A low cost wavelength scanning option is offered to provide spectral information.
Nitrogen Nitrosamines
The Models 965 and 970A combine two powerful detectors in a single LC system.
Instrument: Tracor 950/965 Separation: Normal Phase Peak 1 2 3 4 5 6
Identity
Tracor's new Model 950 pumping system features a unique quickly removable micro liquid head assembly, interchange able with a high flow liquid head. Also an improved electronic flow compensation circuit is used which eliminates pulsing resulting from piston movement—thus providing longer column life and higher sensitivity detector compatibility.
Ν - Ν ι trosod i methy lam ι π e N-Nitrosodiethylamine N-Nitrosodipropylamine N-Nitrosodibutylamine N-Nitrosopipendine N-Nitrosopyrroiidine 8 ng each
This pump is complemented by the 980A solvent programmer for gradient elution operation.
Sulfur and Nitrogen
Halogen Instrument: Tracor 950/965 Separation: Reverse Phase
instrument: Tracor 950/965 Separation: Reverse Phase
Peak 1 2 3 4
Peak 1 2
Identity Fluorobenzene 550 π g Chlorobenzene 550 ng lodobenzene 400 ng 4-Bromotoluene 300 ng
Relative response to halogenated benzenes. All halogens are detected with fluorine being the least sensitive in this case.
Telephones 512:926 2800
512:926 9161
Identity .5 ug Spectracide 1 ug Diazmon
On the left, a direct injection of spectracide run on the Tracor 950/965 after a simple 1/100x1/100 dilution with methanol- The component of interest diazmon is selec tively detected with the Photo-conductivity Detector—here at a level of 0.5 ug. On the right, a 1.0 (tg standard of diazmon.
504:2721421
312:595 2420
201:534 4081
415:938 5490
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ANALYTICAL CHEMISTRY, VOL. 5 1 , NO. 11, SEPTEMBER 1979 • 1063 A
