Determination of fluorine and chlorine in coal_Hunan Sundy Science and Technology Co., Ltd-Sundy,Calorimeter,Proximate Analyzer,Elemental Analyzer

1.Test procedures

Weigh approximately 0.2g of quartz sand at the bottom of the crucible, place about 0.03g of coal sample on top of the quartz sand, cover the coal sample with a thin layer of quartz sand, perform the test according to the set testing procedure, and calculate the results.

2.Combustion conditions

Temperature: 1150℃ Oxygen: 0.4L/min

Argon(carrier): 0.2L/min Argon flow for humidification: 0.1L/min

Water vapor: 0.1L/min Absorption solution: pure water

Instrument:SDXNS200H

Combustion process

Step	Sample Introduction Time (s)	Distance (mm)	Retention Time (s)
Step 1	17	200	100
Step 1	100	30	100
Step 3	100	20	100
Step 4	30	70	350

3.IC conditions

Analytical Column: SH-AP-1 4*200mm Guard Column: SH-GP-2 4.0*50mm

Eluent: EGC KOH, 13mM, 0.7mL/min Column temp.: 35℃

Quantitative loop: 1000ul Linear range:0.1-10mg/L

Detector: SHD-3/6

4.Test results

Interest	GBW11121a		GBW11122a
Interest	Measured(mg/kg)	Certified(mg/kg)	Measured(mg/kg)	Certified(mg/kg)
F	245	247±15	1166	1163±36
	242		1162
	251		1147
	252		1167
	247		1172
	248		1162
Aver.	247.50		1162.67
RSD(%)	1.51		0.73

Interest	GBW11118a		GBW11120a
Interest	Measured(mg/kg)	Certified(mg/kg)	Measured(mg/kg)	Certified(mg/kg)
Cl	98	110±20	1090	1110±60
	99		1112
	103		1099
	99		1119
	98		1110
	101		1117
Aver.	99.67		1107.83
RSD(%)	1.97		1.01