Mass Spectrometry

Dibeler, V. H.; Hipple, J. A.

doi:10.1021/ac60061a007

Cited by 4 publications

(2 citation statements)

References 67 publications

(70 reference statements)

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“…The mass spectrograph allows analysis of nearly all gases and can be used for separation of isotopes at the same time (20,83).…”

Section: Magnetic Defection Oj' Gas Ions In An Electric Field (Masmentioning

confidence: 99%

Some Principles in Amplifier Technique: In the Physiology of Respiration and Circulation

Ibsen¹

1962

Acta Anaesthesiol Scand

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Since the energy produced by an object may be small in relation to the time taken to produce it, it becomes necessary to utilize amplifier technique as in electrocardiography or electro-encephalography. With the appearance of better electronic equipment wider fields have now become capable of measurement in both clinical and experimental medicine. A survey of the physical principles and of various methods for measurements is presented below.To understand the electronic terminology used in this article the following definitions should be recalled.A difference in potential or voltage, E, (measured in volts) between two points of an electrical conductor will cause a current, I, (measured in amperes) between the two points. The current depends upon the resistance, R, (measured in ohms), of the conductor. This relationship is expressed in the formula (Ohm's law) :When the potential is constant, i.e., when the circuit has a constant polarity, designated by either + or -, the resultant current is a direct one (DC). When the potential is alternating, i.e., when there is shifting polarity, the current is alternating (AC). The number of polarity shifts per second is designated as the frequency (cps or Hz). A condenser can transmit only AC, against which it has a resistance inversely proportional to the frequency of the current and to the capacity of the condenser (measured in microfarad, MF). A coil (with or without an iron core) has a greater resistance to AC than to DC. The difference between the resistance to AC and DC depends on the inductance of the coil (measured in henrys, H). The resistance to AC increases with increasing frequency and with greater inductance.

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“…The mass spectrograph allows analysis of nearly all gases and can be used for separation of isotopes at the same time (20,83).…”

Section: Magnetic Defection Oj' Gas Ions In An Electric Field (Masmentioning

confidence: 99%

Some Principles in Amplifier Technique: In the Physiology of Respiration and Circulation

Ibsen¹

1962

Acta Anaesthesiol Scand

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“…Mass Spectrometry VERNON H. DIBELER National Bureau of Standards, Washington, D. C. THE broad survey of the literature of mass spectrometry attempted in the preceding review (61) is continued in the present one on the premise of expanded mutual interests of chemists and physicists in the many fields of science to which mass spectrometry contributes. An effort has been made to include papers, especially of foreign origin, published too late to be included in the previous review.…”

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confidence: 99%

Mass Spectrometry

Dibeler¹

1954

Anal. Chem.

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HE broad survey of the literature of mass spectrometry T attempted in the preceding review (61) is continued in the present one on the premise of expanded mutual interests of chemists and physicists in the many fields of science t o which mass spectrometry contributes. An effort has been made to include papers, especially of foreign origin, published too late t o be included in the previous review.Activity in mass spectrometry continues to increase in scope and intensity. Aside from the magnitude of the present review, comprehensive accounts of the theory, instrumentation, and applicatjons of mass spectrometry (16, 84, 160,208,209,230) attest to this fact. Other reviews (57, 66,149,167,181, 182, 191, 2565,257) consider recent developments and applications in varying detail, stressing for the most part chemical and isotopic analysis. INSTRUMEYTATION, METHODS AND TECHNIQUESWattauch (903,204) gives an extensive description of the various types of electrical and magnetic field arrangements used in conventional instruments for precise mass measurements. He also reports a method for determining dispersion in mass spectrography (207). The construction of a Mattauch-type mass spectrograph with a resolution of about 1/12,000 is reported by Delfosse and NBve de Mevergnies (59). Herzog (140) describes a new instrument with anastigmatic image which utilizes a combination of a spherical condenser and a homogeneous magnetic field. A new instrument utilizing no magnetic field is described b y Paul and Steinwedel (246). Miller and coworkers (212) report the development and certain clinical applications of a port-

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Bleicherde

Zerbe¹,

Luther²

1969

Mineralöle Und Verwandte Produkte

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Mass Spectrometry

Cited by 4 publications

References 67 publications

Some Principles in Amplifier Technique: In the Physiology of Respiration and Circulation

Some Principles in Amplifier Technique: In the Physiology of Respiration and Circulation

Mass Spectrometry

Bleicherde

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