PL84809B1 - - Google Patents

Download PDF

Info

Publication number
PL84809B1
PL84809B1 PL16124573A PL16124573A PL84809B1 PL 84809 B1 PL84809 B1 PL 84809B1 PL 16124573 A PL16124573 A PL 16124573A PL 16124573 A PL16124573 A PL 16124573A PL 84809 B1 PL84809 B1 PL 84809B1
Authority
PL
Poland
Prior art keywords
detector
source
gas
tip
electron capture
Prior art date
Application number
PL16124573A
Other languages
Polish (pl)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to PL16124573A priority Critical patent/PL84809B1/pl
Publication of PL84809B1 publication Critical patent/PL84809B1/pl

Links

Landscapes

  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)

Description

Przedmiotem wynalazku jest radiojonizacyjny detektor wychwytu elektronów, majacy zastosowanie w chromatografii gazowej do sladowych analiz zwiazków elektroujemnych, takich jak zwiazki chloru, fluoru, tlenu i zwiazków ochrony roslin.Znany detektor wychwytu elektronów zawiera korpus, polaczony z koncówka wymienna. Wewnatrz kor¬ pusu jest elektroda zbiorcza, osadzona za pomoca teflonowego izolatora i dwóch pólkolistych wkladek w ekra¬ nie, który jest umocowany w elektrodzie centralnej. Na pólkolistych wkladkach znajduja sie uszczelki gumowe, zapewniajace szczelnosc detektora w kazdym polozeniu elektrody.Wada wyzej opisanego detektora jest koniecznosc stosowania dwu izolatorów, izolujacych od masy katode wraz ze zródlem oraz anode. Zastosowanie dwóch izolatorów wyklucza mozliwosc bezposredniego grzania czesci czynnej detektora przy prowadzeniu analiz w wysokiej temperaturze. Ponadto stosowanie dwu izolatorów przyczynia sie do powstawania w detektorze stref martwych, które usuwa sie za pomoca gazu dodatkowego, wplywajacego do detektora. Powoduje to koniecznosc stosowania dwu niezaleznych strumieni gazu nosnego i dodatkowego. Uzycie gazu dodatkowego wplywa równiez na obnizenie poziomu wykrywalnosci detektora, spowodowane rozcienczeniem próbki przez gaz dodatkowy.Celem wynalazku jest usuniecie wyzej wymienionych wad i niedogodnosci.Cel ten zostal osiagniety przez skonstruowanie detektora, który ma nieizolowane zródlo promieniotwór¬ cze, osadzone bezposrednio w koncówce tak, ze doprowadzony gaz nosny wraz^ze skladnikami analizowanej mieszaniny, rozdzielonymi w kolumnie chromatograficznej przeplywa tylko przez to zródlo.Zaleta detektora, wedlug wynalazku jest uproszczenie konstrukcji, umozliwienie pracy detektora w pod¬ wyzszonej temperaturze oraz wyeliminowanie stosowania gazu dodatkowego.Przedmiot wynalazku jest uwidoczniony w przykladowym wykonaniu ,na rysunku w przekroju po¬ dluznym. Detektor sklada sie z korpusu 1, polaczonego z wymienna koncówka 2, w której jest bezposrednio osadzone zródlo promieniotwórcze 3 o aktywnosci lOmCi lub 2 razy lOmCi. Zródlo 3 jest zabezpieczone przed pionowym przesunieciem sie pierscieniem sprezynujacym 4. W korpusie jest osadzona w izolatorze 5 elektroda zbiorcza 6.2 84 809 Dzialanie detektora wychwytu elektronów wedlug wynalazku, polega na tym, ze do detektora doprowadza sie gaz wraz ze skladnikami analizowanej mieszaniny rozdzielonymi w kolumnie chromatograficznej, tylko przez zródlo promieniotwórcze 3. Zródlo 3, emituje promieniowanie jonizujace gaz, przeplywajacy przez detektor. Do elektrody 6 doprowadza sie napiecie zasilajace, które powoduje zbieranie ladunków elektrycznych, powstalych w przestrzeni czynnej detektora. PLThe invention relates to a radio-ionization electron capture detector for use in gas chromatography for the trace analysis of electronegative compounds such as chlorine, fluorine, oxygen and plant protection compounds. A well-known electron capture detector comprises a body connected to a removable tip. Inside the body is a collecting electrode, mounted by means of a Teflon insulator and two semicircular inserts in the screen, which is fixed in the central electrode. There are rubber gaskets on the semicircular inserts, ensuring the tightness of the detector in every position of the electrode. The disadvantage of the detector described above is the necessity to use two insulators, isolating the cathode and the source from the ground, and the anodes. The use of two insulators excludes the possibility of direct heating of the active part of the detector when conducting analyzes at high temperature. In addition, the use of two insulators contributes to the formation of dead zones in the detector, which are removed by additional gas flowing into the detector. This makes it necessary to use two independent streams of carrier gas and additional gas. The use of supplementary gas also reduces the detection level of the detector, caused by the sample being diluted by the supplementary gas. The aim of the invention is to eliminate the above-mentioned drawbacks and inconveniences. This aim was achieved by constructing a detector that has a non-isolated radioactive source embedded directly in the tip so that that the supplied carrier gas with the components of the analyzed mixture, separated in the chromatographic column, flows only through this source. The advantage of the detector, according to the invention, is the simplification of the structure, enabling the detector to work at higher temperatures and the elimination of the use of additional gas. The subject of the invention is illustrated in the example in longitudinal section in the drawing. The detector consists of a body 1 connected to a removable tip 2, in which a radioactive source 3 with an activity of 10mCi or twice 10mCi is directly embedded. Source 3 is secured against vertical displacement by the spring ring 4. Collecting electrode 6.2 is mounted in the insulator 5 in the body. According to the invention, the operation of the electron capture detector, according to the invention, consists in supplying the detector with gas together with the components of the analyzed mixture separated in the chromatographic column , only through radioactive source 3. Source 3, emits ionizing radiation gas, flowing through the detector. A supply voltage is applied to the electrode 6, which causes the collection of electric charges formed in the active space of the detector. PL

Claims (1)

1. Zastrzezenie patentowe Detektor wychwytu elektronów, skladajacy sie z korpusu, polaczonego z koncówka wymienna, wewnatrz którego jest osadzona elektroda zbiorcza na izolatorze, znamienny tym, ze ma nieizolowane zródlo promieniotwórcze (3), osadzone bezposrednio w koncówce (2) tak, ze doprowadzony gaz nosny wraz ze sklad¬ nikami analizowanej mieszaniny, rozdzielonymi w kolumnie chromatograficznej przeplywa tylko przez to zródlo (3). Prac. Poligraf. UP PRL naklad 120+18 Cena 10 zl PL1. Patent claim Electron capture detector, consisting of a body connected to a replaceable tip, inside which a collecting electrode is mounted on the insulator, characterized by the fact that it has an uninsulated radioactive source (3) embedded directly in the tip (2) so that The carrier gas along with the components of the analyzed mixture, separated in the chromatographic column, flows only through this source (3). Wash. Typographer. UP PRL, circulation 120 + 18 Price PLN 10 PL
PL16124573A 1973-03-13 1973-03-13 PL84809B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL16124573A PL84809B1 (en) 1973-03-13 1973-03-13

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL16124573A PL84809B1 (en) 1973-03-13 1973-03-13

Publications (1)

Publication Number Publication Date
PL84809B1 true PL84809B1 (en) 1976-04-30

Family

ID=19961882

Family Applications (1)

Application Number Title Priority Date Filing Date
PL16124573A PL84809B1 (en) 1973-03-13 1973-03-13

Country Status (1)

Country Link
PL (1) PL84809B1 (en)

Similar Documents

Publication Publication Date Title
Diehl et al. On-line electrochemistry–MS and related techniques
Ross et al. Anodic oxidations. III. The reaction mechanism in the electrochemical acetoxylation and alkoxylation of N, N-dimethylamides
IT1170053B (en) PRE-PACKED DISPERSER ANODE WITH BACKFILL IN FLEXIBLE STRUCTURE FOR CATHODIC PROTECTION WITH IMPRESSED CURRENTS
DE60335051D1 (en) Generator for electrically conductive eluents and associated method of use
US3214296A (en) Rechargeable battery cells
GB867443A (en) Improvements in electrolytic apparatus
MX151275A (en) IMPROVEMENTS IN HIGH CURRENT CONDUCTIVE SYSTEM FOR ELECTRIC OVENS
PL84809B1 (en)
Rudd et al. Anodic oxidations. VII. Reaction mechanism in the electrochemical oxidation of N, N-dimethylformamide in acetic acid and in methanol
Weinberg et al. Sensitive probe for double layer structure. Potential dependent competitive cyanation and methoxylation of 1, 4-dimethoxybenzene
Konno et al. Electrolytic partial fluorination of organic compounds. 6. Highly regioselective electrochemical monofluorination of aliphatic nitrogen-containing heterocycles
GB1339004A (en) Chromatographic apparatus
Mubarak et al. Electrochemical Reduction of 4, 4′‐(2, 2, 2‐Trichloroethane‐1, 1‐diyl)‐bis (chlorobenzene)(DDT) and 4, 4′‐(2, 2‐Dichloroethane‐1, 1‐diyl)‐bis (chlorobenzene)(DDD) at Carbon Cathodes in Dimethylformamide
ES416422A1 (en) Electrolytic installation for the treatment of hot water. (Machine-translation by Google Translate, not legally binding)
Johari et al. Dissociation Studies in High Dielectric Solvents. VII. Transference Numbers of Potassium Chloride in Formamide and in N-Methylacetamide
Avrutov et al. Electrochemical ω-epoxidation of the ethyl ester of Z, Z-farnesylic acid
GB2010490A (en) Thermoionic Detector
SU1721567A1 (en) Micrologging survey sonde for wells
Inoue et al. The Electrochemical Fluorination of Benzenes and Pyridines
Claret et al. Reactions of thermal-energy electrons with organic compounds
Joudaki et al. A Green Electrochemical Method for the Synthesis of 2-(phenylthio)-1 H-benzo [d] imidazole Derivatives
US3647670A (en) Cover for electrolytic cell with mercury cathodes and adjustable anodes
Shukun et al. Protein separation in pH gradients using free‐flow electrophoretic apparatus I. The borate‐mannitol pH gradients
Keenan et al. Anodic oxidation of DDT, methoxychlor, and related compounds
JPS57162248A (en) Rotary anode x-ray tube