所在地区__shanghai__,从事行业_____petrochemical____,分析的物质名称或大致样品组成____工业用苯乙烯(st)______
GB/T 12688.1-1998 工业用苯乙烯纯度的测定 毛细管
气相色谱法
增加了methanol ,因在实际生产中发现供料车子存在methanol 污染
可以归入了研发
Method Information
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6890
gc METHOD
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OVEN
Initial temp: 100 ''C (On) Maximum temp: 200 ''C
Initial time: 10.00 min Equilibration time: 1.00 min
Ramps:
# Rate Final temp Final time
1 0.0(Off)
Post temp: 50 ''C
Post time: 0.00 min
Run time: 10.00 min
BACK INLET (SPLIT/SPLITLESS)
Mode: Split
Initial temp: 200 ''C (On)
Pressure: 13.05 psi (On)
Split ratio: 40:1
Split flow: 100.0 mL/min
Total flow: 104.5 mL/min
Gas saver: Off
Gas type: Nitrogen
COLUMN 1
Capillary Column
Model Number: Agilent DB FFAP
Max temperature: 200 ''C
Nominal length: 30.0 m
Nominal diameter: 320.00 um
Nominal film thickness: 1.00 um
Mode: constant pressure
Pressure: 13.05 psi
Nominal initial flow: 2.5 mL/min
Average velocity: 44 cm/sec
Inlet: Back Inlet
Outlet: Back Detector
Outlet pressure: ambient
BACK DETECTOR (FID)
Temperature: 250 ''C (On)
Hydrogen flow: 40.0 mL/min (On)
Air flow: 400.0 mL/min (On)
Mode: Constant column+makeup flow
Combined flow: 25.0 mL/min
Makeup flow: On
Makeup Gas Type: Nitrogen
Flame: On
Electrometer: On
Lit offset: 2.0
SIGNAL 1
Data rate: 20 Hz
Type: back detector
Save Data: On
Zero: 0.0 (Off)
Range: 0
Fast Peaks: Off
Attenuation: 0
INJECTION
Manual
INJECTION VOLUME
0.40 uL
COLUMN COMP 1
Derive from back detector
AUX PRESSURE 3
Description:
Gas Type: Nitrogen
Initial pressure: 15.00 psi (On)
Initial time: 0.00 min
# Rate Final pres Final time
1 0.0(Off)
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Calibration Table
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Calib. Data Modified : 12/23/2009 3:41:00 PM
Calculate : Internal Standard Percent
Based on : Peak Area
Rel. Reference Window : 3.000 %
Abs. Reference Window : 0.000 min
Rel. Non-ref. Window : 3.000 %
Abs. Non-ref. Window : 0.000 min
Do not use Multiplier & Dilution Factor with ISTDs
Uncalibrated Peaks : not reported
Partial Calibration : Yes, identified peaks are recalibrated
Correct All Ret. Times: No, only for identified peaks
Curve Type : Linear
Origin : Included
Weight : Equal
Recalibration Settings:
Average Response : Average all calibrations
Average Retention Time: Floating Average New 75%
Calibration Report Options :
Printout of recalibrations within a sequence:
Calibration Table after Recalibration
Normal Report after Recalibration
If the sequence is done with bracketing:
Results of first cycle (ending previous bracket)
Default Sample ISTD Information (if not set in sample table):
ISTD ISTD Amount Name
# [mg]
----|-------------|-------------------------
1 9.00000e-3 n-heptane(ISTD)
Signal 1: FID1 B,
RetTime Lvl Amount Area Amt/Area Ref Grp Name
[min] Sig [mg]
-------|--|--|----------|----------|----------|---|--|---------------
1.210 1 1 9.00000e-3 9.00000e-3 1.00000 1 UN1
1.335 1 1 9.00000e-3 9.00000e-3 1.00000 +I1 n-heptane(ISTD)
1.430 1 1 9.00000e-3 9.00000e-3 1.00000 1 UN6
1.630 1 1 9.00000e-3 9.00000e-3 1.00000 1 UN4
1.730 1 1 9.00000e-3 3.11958e-3 2.88500 1 methanol
1.869 1 1 9.29000e-3 9.98920e-3 9.30004e-1 1 benzene
2.048 1 1 9.00000e-3 9.00000e-3 1.00000 1 UN2
2.135 1 1 9.00000e-3 9.00000e-3 1.00000 1 UN5
2.349 1 1 9.48000e-3 1.01940e-2 9.29959e-1 1 toluene
3.035 1 1 9.25900e-3 9.85000e-3 9.40000e-1 1 ethylbenzene
3.197 1 1 9.30000e-3 9.48980e-3 9.80000e-1 1 m,p-xylene
3.540 1 1 9.49500e-3 1.03210e-2 9.19969e-1 1 cumene
3.776 1 1 9.58800e-3 1.04220e-2 9.19977e-1 1 o-xylene
4.098 1 1 9.51000e-3 9.60610e-3 9.89996e-1 1 n-propylbenzene
4.397 1 1 9.95200e-3 1.07010e-2 9.30007e-1 1 methyl ethylbenzene
4.750 1 1 9.00000e-3 8.18180e-3 1.10000 1 UN7
6.720 1 1 1.03850e-2 1.14120e-2 9.10007e-1 1 a-methylstyrene
7.675 1 1 9.00000e-3 1.03450e-2 8.69986e-1 1 phenylacetylene
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故障情况:
刚开始没有对methanol 的响应因子进行分析,导致methanol 未能检出,未能很好监控进厂原料纯度,后经过定性确认为methanol ,才进行计算响应因子并装入校正表
仪器未发生故障