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NGY235N00
-N2O-
| Observation |
| Frequency |
: |
Continuous |
| Method |
: |
GC-ECD |
| Instrument |
: |
Shimadzu |
System GC C1103200183K1 |
| Description |
: |
Gas chromatograph oven temperature is 60ºC, injector temperature 100ºC and detector temperature 300ºC.
Separation column contains the Porapak-Q 80/100 mesh 1.0 meter. |
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| Calibration |
| Scale |
: |
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| Description |
: |
Calibration gases used: N2O in nitrogen |
| Data Processing |
| Unit |
: |
ppb |
| Description |
: |
Daily data are calculated under the condition with standard deviation of hourly mean data. Monthly data are calculated from daily data. |
| Average Procedure |
| Hourly |
: |
Reject irregular and erroneous data. |
| Daily |
: |
(1) Take the arithmetic mean of observed hourly data for one day, and
(2) Adopt daily mean value with the standard deviation less than 10% of the mean value. |
| Monthly |
: |
(1) Take the arithmetic mean of selected daily data.
(2) Reject the daily data having the maximum difference which is greater than 10% of monthly mean, and
(3) Back to (1) until no daily data is rejected. |
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