Gas chromatograph

Gas chromatograph, with flame ionization detector.

gas chromatograph with a flame ionisation detector and a split/splitless injector,

The gas chromatograph shall comprise the following elements.

Gas-liquid chromatograph, together with an electronic integrator, as described in Section III of Annex VI to Commission Regulation (EEC) No 72/77.

Gas chromatograph with electron detector, Ni 63.

Gas chromatograph fitted with a thermal conductivity detector.

Gas chromatograph fitted with a flame ionization detector.

Gas chromatograph with flame-ionization detector

Gas chromatograph with flame ionization detector.

Gas chromatograph for use with a capillary column, and provided with a splitting system composed of:

Gas-chromatograph fitted with automatic headspace sampler or with facilities for manual sample injection.

Gas-chromatograph fitted with automatic head-space sampler or with facilities for manual sample injection.

A temperature programmed gas chromatograph fitted with a flame ionisation detector and integrator or other data handling system capable of measuring peak areas or peak heights.

A gas chromatograph employing a detector working on the principle of thermal conductivity changes (a catharometer) may also be used for the determination of the qualitative and quantitative composition of a mixture of fatty acid methyl esters.

gas chromatograph with a flame ionisation detector and a split/splitless injector,

The gas chromatograph must be equipped with septa, withstanding high temperatures, which can be frequently used and exhibit generally a very low degree of "bleeding"

Gas chromatograph fitted with a flame spectrophotometer detector equipped with a selective filter for sulphur compounds (wavelength = 394 nm) or any other suitable detector.

The gas chromatograph msut be equipped with septa, withstanding high temperatures, which can be frequently used and exhibit generally a very low degree of "bleeding".

Gas chromatograph fitted with a flame ionization detector and a stainless steel column (4 m × 1/8 inch) previously treated with dimethyldichlorosilane and packed with a stationary phase consisting of a mixture of diethyleneglycol succinate (5 %) and phosphoric acid (1 %) (DEGS - H3PO4) or of a mixture of diethyleneglycol adipate (7 %) and phosphoric acid (1 %) (DEGA - H3PO4) bonded on Gaschrom Q 80- 100 mesh.

Gas chromatograph:

To bring the sample to the gas chromatograph.

Then inject the contents of the syringe into the gas chromatograph.

For NMHC an automated GC with a FID shall be used.

The study involved 40 randomly selected mothers and their children form the region called Prekmurje. The analyses were carried out by gas chromatograhy.

Figure 9 shows a typical GC assembled to routinely determine CH4.

Gas-liquid chromatography

Gas chromatography

Gas chromatography

Gas Chromatographic (GC) Method

Gas Chromatographic Method (GC, Figure 9)

Suitable gas chromatography conditions

The determination is carried out by gas chromatography.

for an analysis of the volatile constituents by gas chromatography.

Analysis of volatile constituents by gas chromatography

Usual thin-layer and gas chromatography equipment

Inject 1 to 3 Âl of the solutions obtained under 6.1.9 in the gas chromatograph.

Gas chromatography apparatus fitted with an electron capture detector (ECD).

The following column and gas chromatographic conditions have been found suitable:

Using a gas-chromatography syringe, remove an appropriate quantity from the transfer bottle.

Fit the needle, insert the syringe into the gas chromatograph injector, open the valve and inject.

After centrifuging, a portion of the liquid phase is subjected to gas chromatography and the chloroform content calculated.

For the gas chromatography procedure 6.2.1 (Hallcomid M18 column) use the following standard mixtures.

This method describes the gas chromatographic analysis of methanol in all kinds of cosmetic products (including aerosols).

For the gas chromatography procedure 6.2.2 (Porapak QS or Chromosorb 105) use the following standard mixtures.

Series A2 "precision sampling" gas-chromatography syringe 25 ¶l or 50 ¶l (Figure 5) or equivalent.

The method is based on the quantitative determination of Δ9-THC by gas chromatography (GC) after extraction with a suitable solvent.

This method specifies the gas chromatographic determination of resorcinol in shampoos and hair lotions.

The methyl esters of the component fatty acids of the oil or fat are separated by low temperature argentation thin-layer chromatography and quantitatively determinated by gas-liquid chromatography.

This method is used for the determination of chloroform in toothpaste by gas chromatography. This method is suitable for the determination of chloroform at levels of 5 % or less.