ASTM E1510 - 95(2013)e1 - Standard Practice for Installing Fused Silica Open Tubular Capillary Columns in Gas Chromatographs

ASTM E1510 - 95(2013)e1

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

Status : Current   Published : January 2013

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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)

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Note 1The 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 2Gases 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

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Note 1Fig. 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 2Hydrogen provides similar resolution in one-half the analysis time of helium for an isothermal analysis.
Note 3

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Note 430 m, 0.25-mm ID, 0.25 μm 5 % diphenyl − 95 % dimethyl polysiloxane 0.1-μL split injection of chlorinated pesticides.

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FIG. 2 Hydrogen Versus Helium (Isothermal Analysis)

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

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

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Note 330 m, 0.53-mm ID, 0.50 μm 5 % diphenyl − 95 % dimethyl polysiloxane 0.1 μL direct injection of 50 pg pesticide standard.

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FIG. 4 ECD Septum Bleed



Standard NumberASTM E1510 - 95(2013)e1
TitleStandard Practice for Installing Fused Silica Open Tubular Capillary Columns in Gas Chromatographs
StatusCurrent
Publication Date01 January 2013
Normative References(Required to achieve compliance to this standard)No other standards are normatively referenced
Informative References(Provided for Information)No other standards are informatively referenced
Descriptors Capillary columns, Capillary gas chromatography, Gas chromatographs, Installing capillary columns
ICS71.040.50
PublisherASTM
FormatA4
DeliveryYes
Pages13
File Size249.2 KB
Price£45.00


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