ADV06-15_1-412

•

2007 vol. 3

Chemical/Petrochemical

tight connection. Target analytes resolve well and

the solvent and triglyceride peaks show excellent

symmetry (Figure 4).

0.53mmMXT

-Biodiesel TG columns

The 0.53mm MXT

-Biodiesel TG columns are a

simpler alternative to using a 0.32mm column

coupled to a 0.53mm retention gap. Restek applied

Integra-Gap™ technology to the 0.53mm MXT

Biodiesel TG columns, eliminating the column

coupling. These single unit leak-proof columns fea-

ture a built-in retention gap, reducing the risk of

peak broadening and tailing. Chromatography

from the 0.53mm MXT

-Biodiesel TG with

Integra-Gap™ technology (Figure 5) is excellent

and comparable to that obtained on the 0.32mm

ID column in Figure 4.

Conclusion

As demonstrated, for high temperature GC analysis,

the metal MXT

-Biodiesel TG column is a rugged

column that withstands the harsh temperatures

required for total residual glycerin analysis. The

column has the resolution needed for accurate,

reliable results and is more stable at high tempera-

tures than competitive fused silica columns, leading

to longer column lifetimes. To improve the relia-

bility and robustness of your biodiesel analyses, try

one of our MXT

-Biodiesel TG columns.

Figure 4

Derivatized B100 samples resolve well on the 0.32mm

MXT

-Biodiesel TG column, which is factory-coupled to a 0.53mm

MXT

retention gap.

Excellent peak

symmetry for

glycerides!

Figure 5

Equivalent chromatographic quality on the 0.53mm

MXT

-Biodiesel TG analytical column with Integra-Gap™

Column:

MXT

-Biodiesel TG 13m, 0.53mm ID, 0.16µm with built-in 2m Integra-Gap™

(total column length 15m)

Sample:

B100 + IS Butanetriol & Tricaprin derivatized with MSTFA as per ASTM D-6584

Instrument: Shimadzu 2010

Inj.:

1.0µL cool on-column; Inj. temp.: oven track

Carrier gas: hydrogen, constant flow

Flow rate:

4mL/min.

Oven temp.: 50°C (hold 1 min.) to 180°C @ 15°C/min., to 230°C @ 7°C/min.,

to 430°C @ 30°C/min. (hold 5 min.)

Det.:

FID @ 430°C

(Data acquired on prototype column)

GC_PC00934

monoglycerides

diglycerides & triglycerides

butanetriol (IS)

glycerin

tricaprin (IS)

GC_PC00935

monoglycerides

triglycerides

Column:

MXT

-Biodiesel TG 10m, 0.32mm ID, 0.1µm with 2m x 0.53mm retention gap

Sample:

B100 + IS Butanetriol & Tricaprin derivatized with MSTFA as per ASTM D-6584

Instrument: Shimadzu 2010

Inj.:

1.0µL cool on-column; Inj. temp.: oven track

Carrier gas: hydrogen, constant flow

Flow rate: 4mL/min.

Oven temp.: 50°C (hold 1 min.) to 180°C @ 15°C/min., to 230°C @ 7°C/min.,

to 430°C @ 30°C/min. (hold 5 min.)

Det.:

FID @ 430°C

butanetriol (IS)

glycerin

tricaprin (IS)

diglycerides

thank

you

Instrument provided courtesy of Shimadzu

www.shimadzu.com

MXT

-Biodiesel TG Column

df (µm)

temp. limits

14-Meter w/2m

Integra-Gap™

0.53mm 0.16 -60 to 380/430°C 70289

$530