公开(公告)号：US3786249A

公开(公告)日：1974-01-15

申请号：US3786249D

申请日：1971-12-20

Applicant: STANFORD RESEARCH INST

Inventor： ANBAR M ,  ABERTH W

IPC: H01J49/12 ,  H01J49/30 ,  H01J39/28

CPC classification number: H01J49/123 ,  H01J49/30

Abstract: A technique for performing isotope ratio analysis is described which utilizes a negative ion mass spectrometer coupled with a negative ion duoplasmatron source. An untreated sample to be analyzed for a specific compound is diluted with a known amount of isotopic analog. The sample plus analog is volatilized if necessary, and purified by gas chromatography before entering the ion source. The extremely hot plasma of the duoplasmatron thoroughly fragments the large molecules and efficiently ionizes the input gas stream. The resulting ionized stream is analyzed in a magnetic mass spectrometer. The signals from a pair of peaks representing the common and noncommon tag isotope of the same element are converted to frequency signals and the frequency signals are converted to a ratio signal by a frequency ratio counter. The value of this ratio then indicates the precise amount of compound in the sample. The system operates very efficiently on stable, non-radioactive isotopes and is applicable to many analyses which cannot be performed with radioactive isotopes.

Abstract translation: 描述了一种用于执行同位素比率分析的技术，其利用负离子质谱仪与负离子双质子源耦合。 用已知量的同位素类似物稀释待分析特定化合物的未处理样品。 如果需要，样品加类似物挥发，并在进入离子源之前通过气相色谱法纯化。 二等离子体的极热等离子体使大分子彻底碎裂，并有效地离子化输入气流。 在磁性质谱仪中分析得到的电离流。 来自表示同一元素的共同和非共同标签同位素的一对峰值的信号被转换为频率信号，并且通过频率比计数器将频率信号转换为比率信号。 该比率的值然后表示样品中化合物的精确量。 该系统对稳定的非放射性同位素非常有效地运行，适用于许多不能用放射性同位素进行的分析。

公开(公告)号：US3741809A

公开(公告)日：1973-06-26

申请号：US3741809D

申请日：1971-05-13

Applicant: STANFORD RESEARCH INST

Inventor： ANBAR M

IPC: H01M8/18 ,  H01M29/04

CPC classification number: H01M8/18 ,  Y02E60/528

Abstract: METHOD FOR APPARATUS FOR THE POLLUTION-FREE GENERATION OF ELECTROCHEMICAL ENERGY FROM COAL, HYDROCARBONS OR OTHER CARBONACHEMICAL FUELS BY A CYCLIC OPERATION WHEREIN A METAL SUCH AS LEAD IS OXIDIZED IN AN ELECTROCHEMICAL CELL DELIVERING ELECTROMOTIVE FORCE, WITH THE RESULTING LEAD ODIDE THEN BEING REDUCED IN A MOLTEN SALT MELT WITHIN A REGENERATION CHAMBER BY THE ADDITION THERETO OF THE FUEL. THE REDUCED LEAD METAL IS THEN RETURNED TO THE CELL FOR THE NEXT CYCLE. A USEFUL SALT MELT FOR EMPLOYMENT IN THE REGENERATION CHAMBER COMPRISES ADMIXED ALKALI METAL CARBONATES, AND PREFERABLY A MELT OF THIS CHARACTER IS EMPLOYED BOTH AS THE VEHICLE IN WHICH THE LEAD IS REDUCED BY THE FUEL AS WELL AS FOR THE ELECTROLYTE IN THE CELL. PASSAGE OF THE LEAD AND LEAD OXIDE BETWEEN THE RESPECTIVE CELL AND REGENERATION ZONES CAN BE CONTINUOUS OR INTERMITTENT. THE TOTAL OPERATION IS CAR-. RIED OUT WITHOUT FORMATION OF POLLUTANT GASES, AND ONLY CO2, (2 AND H2O VAPORS ARE VENTED. ANY SULFUR PRESENT IN THE FUEL IS CONVERTED TO LEAD SULFATE AND IS REMOVED FROM THE SALT, USUALLY BY TREATMENT OF A SIDESTREAM.