Nitrogen-Phosphorus Detector Technique Definition

Technique Schema Version 0.34

Technique definition for Nitrogen-Phosphorus Point Detector data

Table of Contents

Experiment Data Role Blueprints (1)

  • Data Source
  • Method Categories (5)

  • Method Description
  • Detector Properties
  • Detector Settings
  • Electrometer Settings
  • A/D Converter Settings
  • Result Blueprints (1)

  • NPD Trace
  • Bibliography

    Experiment Data Role Blueprints

    Data Source Experiment Data Role

    Reference to the GC separation experiment step.
    Experiment Flowconsumed
    Modalityrequired
    maxOccurs1

    Method Blueprint

    Category: Method Description (optional, max. 1 occurrences)
    Basic contextual information about the measurement method.

    Parameter: Method Name : String (optional, max. 1 occurrences)
    Name of the method used for the measurement.

    Parameter: Method Reference : String (optional, max. 1 occurrences)
    External reference to measurement method.

    Category: Detector Properties (optional, max. 1 occurrences)

    Parameter: Flame Tip Type : String (optional, max. 1 occurrences)
    Whether the flame tip is grounded or floating (=isolated).
    Allowed values: grounded, floating, other

    Parameter: Flame Tip Diameter (Length: [mm][in]) : Float (optional, max. 1 occurrences)
    Diameter of the flame tip jet.

    Parameter: Detector Geometry : String (optional, max. 1 occurrences)
    Collector electrode design.
    Allowed values: loop, tube, lateral plates, other

    Parameter: Detector Position : String (optional, max. 1 occurrences)
    Position of the detector in the instrument. Often called 'A' or 'B', 'left' or 'right', ...

    Parameter: Make Up Gas Identity : String (optional, max. 1 occurrences)
    Identity of the make up (also called auxiliary) gas of the detector.
    Allowed values: helium, hydrogen, nitrogen, argon, other

    Category: Alkali Ion Source Properties (optional, max. 1 occurrences)
    Characteristics of the alkali salt used as the ion source in the detector.

    Parameter: Ion Source Identity : String (optional, max. 1 occurrences)
    Alkali salt used as the ion source, typically cesium or rubidium.
    Allowed values: cesium, rubidium, other

    Parameter: Ion Source Type : String (optional, max. 1 occurrences)
    Physical form of the alkali salt used as the ion source.
    Allowed values: pellets, coated grid, coated wire, purged capillary, other

    Parameter: Heating Mode : String (optional, max. 1 occurrences)
    Method for heating the alkali salt. Direct: Separate heater is used. Indirect: Flame is used for heating.
    Allowed values: direct, indirect

    Parameter: Direct Mode Heater Current (Current: [mA]) : Float (optional, max. 1 occurrences)
    Current used for direct heating of the alkali salt. Only Present if 'direct' heating mode is used.

    Parameter: Purge Capillary Gas Identity : String (optional, max. 1 occurrences)
    Identity of the gas that flows through the purge capillary ion source.

    Parameter: Purge Capillary Gas Flow Rate (Flow Rate: [mL/min][µL/min]) : Float (optional, max. 1 occurrences)
    Flow rate of the gas that flows through the purge capillary ion source.

    Category: Detector Settings (optional, max. 1 occurrences)

    Parameter: Block Temperature (Temperature: [K][°C][°F]) : Float (optional, max. 1 occurrences)
    Configured temperature of the detector base block.

    Parameter: Bias Voltage (Voltage: [V]) : Float (optional, max. 1 occurrences)
    DC polarizing voltage, typically between 100-300 V.

    Parameter: Hydrogen Flow Rate (Flow Rate: [mL/min][µL/min]) : Float (optional, max. 1 occurrences)
    Flow rate of the hydrogen going to the flame.

    Parameter: Air Flow Rate (Flow Rate: [mL/min][µL/min]) : Float (optional, max. 1 occurrences)
    Flow rate of the air going to the flame.

    Parameter: Oxygen Flow Rate (Flow Rate: [mL/min][µL/min]) : Float (optional, max. 1 occurrences)
    Flow rate of the oxygen going to the flame.

    Parameter: Make Up Gas Flow Rate (Flow Rate: [mL/min][µL/min]) : Float (optional, max. 1 occurrences)
    Flow rate of the make up (also called auxiliary) gas.

    Category: Electrometer Settings (optional, max. 1 occurrences)

    Parameter: Range (Current: [A][mA][µA][nA][pA][fA]) : Float (optional, max. 1 occurrences)
    Full-scale range of the electrometer, mostly given in full decades.

    Parameter: Current to Voltage Conversion Factor (Factor: [A/V]) : Float (optional, max. 1 occurrences)
    Gain factor on the conversion from current to voltage.

    Parameter: Offset Current (Current: [µA][nA][pA][fA]) : Float (optional, max. 1 occurrences)
    Bucking (zero adjustment) current to remove background ions, applied before current-to-voltage conversion.

    Parameter: Offset Voltage (Voltage: [V][mV][µV][nV]) : Float (optional, max. 1 occurrences)
    Bucking (zero adjustment) voltage to remove background ions, applied after current-to-voltage conversion.

    Parameter: Attenuation Factor : Int (optional, max. 1 occurrences)
    Pre-A/D conversion amplitude control factor, typically in the range of 1-1024.

    Parameter: Bandwidth (Rate: [µV/s][mV/s]) : Float (optional, max. 1 occurrences)
    Response rate of the electrometer.

    Parameter: Time Constant (Time: [s][ms][µs]) : Float (optional, max. 1 occurrences)
    Amount of time required for response to reach 1-1/e (~ 63.2 %) full scale. [IEEE 421A-1978]

    Category: A/D Converter Settings (optional, max. 1 occurrences)

    Parameter: Channel ID : String (optional, max. 1 occurrences)
    A/D converter channel ID, e.g. 'A', 'B', ... or '1', '2', ...

    Parameter: Mode : String (optional, max. 1 occurrences)
    Acquisition scheme for detection.
    Allowed values: single-ended, differential

    Parameter: Range (Voltage: [V][mV][µV]) : Float (optional, max. 1 occurrences)
    Maximum full-scale voltage of the A/D converter.

    Parameter: Range Polarity : String (optional, max. 1 occurrences)
    Polarity of the voltage range of the A/D converter.
    Allowed values: positive, negative, bipolar

    Parameter: Resolution (Bits: [bits]) : Int (optional, max. 1 occurrences)
    A/D converter signal resolution, given in number of bits, e.g. 12, 16, 24.

    Parameter: Digitization Rate (Frequency: [Hz]) : Float (optional, max. 1 occurrences)
    Number of data points collected per second (after any averaging).

    Parameter: Averaging Factor (Count: ) : Float (optional, max. 1 occurrences)
    Number of raw values averaged to obtain a data point.

    Result Blueprints

    NPD Trace Result

    Time-base trace of NPD detector data.

    NPD Trace Series Set (required)

    Name Time Signal
    Documentation TODO Detector output signal
    Dependencyindependentdependent
    Data Type Float Float
    Modalityrequiredrequired
    maxOccurs11
    Plot Scalelinearlinear
    Quantity:UnitsTime : [ms][s][min]
    Voltage : [V][mV][µV][nV][pV]
    Current : [A][mA][µA][nA][pA][fA]
    Arbitrary : [arbitrary]
    Allowed Values

    Bibliography

    IEEE 421A-1978 - 1 reference
    IEEE Standard 421A-1978


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