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| CHROMABOND® XTR |
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| Kieselguhr phase for liquid-liquid extraction |
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Features
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Base material coarse-grained kieselguhr (also known as diatomaceous earth, hydromatrix, celite)
large pore size, high pore volume, constantly high batch-to-batch quality
pH working range 1–13 |
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Application:
Liquid-liquid extraction of highly viscous aqueous solutions such as physiological fluids (blood, plasma, and serum) in clinical chemistry, dyes in textiles, environmental and food analysis without use of a separation funnel
High water loadability without breakthrough of water during elution with organic solvents
Also suited for removing small amounts of water from solvents which are not miscible with water
For applications click here. |
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Advantages:
fast, reproducible and economical
simultaneous preparation of several samples
no problems with phase separation ∙ no formation of emulsions
high recovery rates
saving of time and solvents
organic solutions need not to be dried after separation |
| General column parameters |
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Solvents applicable for elution |
| CHROMABOND® XTR |
max. volume capacity of aq. solution |
waiting period before elution |
elution volume |
diethyl ether
tert-butyl methyl ether
ethyl acetate
n-hexane
cyclohexane
toluene
dichloromethane (methylene chloride)
trichloromethane (chloroform)
solvent mixtures:
trichloromethane – methanol (90:10, v/v)
trichloromethane – methanol (85:15, v/v)
diethyl ether – ethanol (90:10, v/v)
diethyl ether – ethanol (80:20, v/v)
dichloromethane – 2-propanol (90:10, v/v)
dichloromethane – 2-propanol (85:15, v/v) |
| volume |
amount
of adsorbent |
| 1 mL |
250 mg |
0.25 mL |
5 min |
3 mL |
| 3 mL |
500 mg |
0.5 mL |
5 min |
6 mL |
| 6 mL |
1 g |
1 mL |
5–10 min |
8 mL |
| 15 mL |
3 g |
3 mL |
5–10 min |
12 mL |
| 30 mL |
4.5 g |
5 mL |
5–10 min |
16 mL |
| 45 mL |
8.3 g |
10 mL |
10–15 min |
24 mL |
| 70 mL |
14.5 g |
20 mL |
10–15 min |
40 mL |
| 150 mL |
37.5 g |
50 mL |
10–15 min |
90 mL |
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Depending on the concentration of the analytes eluates can be analysed immediately, or the organic solvent is evaporated. The pH value of the aqueous solution can be altered on the column, which enables elution of different compounds of a sample under optimised conditions. Under certain circumstances, acidic, neutral, and basic compounds can be fractionated in this way. |
Eluents with too high alcohol contents cause an increase in volume of the aqueous phase on the CHROMABOND® XTR. Here the column could be overloaded and the aqueous phase displaced from the column. In this case, a greater capacity column should be used. |
Ordering information
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column volume |
1 mL |
3 mL |
6 mL |
15 mL |
30 mL |
45 mL |
70 mL |
150 mL |
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adsorbent weight |
250 mg |
500 mg |
1 g |
3 g |
4.5 g |
8.3 g |
14.5 g |
37.5 g |
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pack of |
100 |
50 |
30 |
30 |
30 |
30 |
30 |
10 |
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CHROMABOND® XTR polypropylene columns |
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730501 |
730502 |
730487 |
730489 |
730505 |
730506 |
730507 |
730509 |
| CHROMABOND® XTR polypropylene columns · BigPacks |
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730487.250
(pack of 250) |
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730507.100
(pack of 100) |
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CHROMABOND® MULTI 96 XTR |
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96er plates 96 x 150 mg, packs of 1 plate, for max. 96 x 0.2 mL aqueous solution |
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738131.150M |
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CHROMABOND® XTR adsorbent |
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50 bags of 14.5 g
(for max. 20 mL
aqueous solution each) |
for 70 mL PP columns
with 100 PE filter elements |
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730585 |
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for NT20 with 50 PE filter elements
(dia. 10 mm) |
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730586 |
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500 g |
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730595.500 * |
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1 kg |
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730595.1000 * |
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5 kg |
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730595.5000 *
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Accessories for liquid-liquid extraction with CHROMABOND® XTR |
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variable polypropylene rack for 24 positions, incl. 24 PP stopcocks and 24 PP needles |
730508 |
| Glass columns on request |
* These products contain harmful substances which must be specially labeled as hazardous. For detailed information please see MSDS.
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