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  • ASTM
    E1510-95(2013)e1 Standard Practice for Installing Fused Silica Open Tubular Capillary Columns in Gas Chromatographs
    Edition: 2013
    $103.58
    Unlimited Users per year

Description of ASTM-E1510 2013

ASTM E1510-95-e1-Reapproved2013

Historical Standard: Standard Practice for Installing Fused Silica Open Tubular Capillary Columns in Gas Chromatographs




ASTM E1510

Scope

1.1 This practice covers the installation and maintenance of fused silica capillary columns in gas chromatographs that are already retrofitted for their use. This practice excludes information on:

1.1.1 Injection techniques.

1.1.2 Column selection.

1.1.3 Data acquisition.

1.1.4 System troubleshooting and maintenance.

1.2 For additional information on gas chromatography, please refer to Practice E260. For specific precautions, see 7.2.2.2(1), 7.2.2.2(2), 7.2.7, and 7.2.7.2.

1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific safety information, see Section 6, 7.2.2.2(1), 7.2.2.2(2), 7.2.7, and 7.2.7.2.2

TABLE 1 Typical Splitter Vent Flow Rates (50 to 1 split ratio) (at optimum linear velocity)

Carrier gas

0.25-mm ID,
cm3 /min

0.32-mm ID,
cm3 /min

0.53-mm ID,
cm3 /min

  helium
  hydrogen

35
70

 80
160

125
250



Note 1—The curves were generated by plotting the height equivalent to a theoretical plate (length of column divided by the total number of theoretical plates, H.E.T.P.) against the column's average linear velocity. The lowest point on the curve indicates the carrier gas velocity in which the highest column efficiency is reached.
Note 2—Gases information available from Compressed Gas Association (CGA), 4221 Walney Rd., 5th Floor, Chantilly, VA 20151-2923, http://www.cganet.com.
FIG. 1 Van Deemter Profile for Hydrogen, Helium, and Nitrogen Carrier Gases

Carrier gas: Hydrogen

Carrier gas: Helium

Linear velocity: 40 cm/s

Linear velocity: 20 cm/s


Note 1—Fig. 2 shows that the resolution is similar but the analysis time is reduced by 50 % when comparing hydrogen to helium in an isothermal analysis using optimum flow velocities.
Note 2—Hydrogen provides similar resolution in one-half the analysis time of helium for an isothermal analysis.
Note 3—

 

1. Tetrachloro-m-

 8. Heptachlor epoxide

15. Endosulfan II

 

  xylene

 9. γ-chlordane

16. DDD

 

2. α-BHC

10. Endosulfan I

17. Endrin aldehyde

 

3. β-BHC

11. α-chlordane

18. Endosulfan sulfate

 

4. γ-BHC

12. Dieldrin

19. DDT

 

5. δ-BHC

13. DDE

20. Endrin ketone

 

6. Heptachlor

14. Endrin

21. Methyoxychlor

 

7. Aldrin

 

 


Note 4—30 m, 0.25-mm ID, 0.25 μm 5 % diphenyl − 95 % dimethyl polysiloxane 0.1-μL split injection of chlorinated pesticides.

 

Oven temperature: 210°C isothermal

 

Injector and detector temperature: 250°C/300°C

 

ECD sensitivity: 512 × 10 −11

 

Split vent: 100 cm 3 /min


FIG. 2 Hydrogen Versus Helium (Isothermal Analysis)

FIG. 3 Capping Silanol Groups with Dimethyl Dichlorosilane (DMDCS)

Note 1—Septum bleed can obscure or co-elute with compounds of interest, thus decreasing the analytical accuracy.
Note 2—

 

1. 2,4,5,6-tetrachloro-

 8. Heptachlor

16. p,p-DDD

 

 m-xylene (IS)

    epoxide

17. Endrin aldehyde

 

2. α-BHC

 9. γ-chlordane

18. Endosulfan sul-

 

3. β-BHC

10. Endosulfan I

    fate

 

4. γ-BHC

11. α-chlordane

19. p,p-DDT

 

5. δ-BHC

12. Dieldrin

20. Endrin ketone

 

6. Heptachlor

13. p,p-DDE

21. Methyoxychlor

 

7. Aldrin

14. Endrin

22. Decachlorobi-

 

 

15. Endosulfan II

   phenyl (IS)


Note 3—30 m, 0.53-mm ID, 0.50 μm 5 % diphenyl − 95 % dimethyl polysiloxane 0.1 μL direct injection of 50 pg pesticide standard.

Oven temperature: 150 to 275°C at 4°C/min,
 hold 15 min

 

Injector temperature: 250°C

Detector temperature: 300°C

Carrier gas: Helium

 

Linear velocity: 40 cm/s (Flow rate: 10 cm 3 /min)

 

ECD sensitivity: 8 × 10 −11 AFS

 


FIG. 4 ECD Septum Bleed

Keywords

capillary columns; capillary gas chromatography; gas chromatographs; installing capillary columns


ICS Code

ICS Number Code 71.040.50 (Physicochemical methods of analysis)


DOI: 10.1520/E1510-95R13E01

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