Mã sản phẩm: C5230-240
Trạng thái: Có sẵn
Xuất xứ: Environmental Express, USA
Chi tiết thông tin về thành phần như sau:
| Materials of Construction | PTFE-coated aluminum block, powder-coated steel housing |
| Power | 240 VAC, 7.5 amps |
| Power (Hz) | 50 |
| Item# | Description | ||
| C5231-240V | MicroBlock R, 240v, Block Only | ||
| C5214B | Phenol Reaction Tube, each | ||
| C5219 | Phenol Distillation Head, each | ||
| C5210 | Cold Finger for Distillation Glassware, each | ||
| C5228 | Receiver Tube forAmmonia/Phenol Distillation, each | ||
| C5227 | Outlet Tube for Phenol, each | ||
| C5213 | Phenol Pierced Cap, 10pk | ||
| C5218 | PTFE-Faced Septas for Distillation Cap, 20pk | ||
| C5225 | Silicon Sealing Ring, 10pk |
PROCEDURE
7.1 Pipette 50mL of sample into a beaker. Adjust pH to 4 with NaOH [1+9] or with Sulfuric Acid [1+9]. Transfer to the
skirted Reaction Tube. For soil samples, weigh 1g or less into beaker and 50mL reagent water. Adjust pH to 4 with
NaOH [1+9] or sulfuric acid [1+9] while stirring and transfer to the skirted Reaction Tube. Add a pinch of boiling
chips.
7.2 Repeat Step 7.1 for all samples to be distilled up to a maximum of 10.
7.3 Assemble the distillation glassware setup as shown in Figure 4 (page 16) and position in the heater block.
7.4 Turn on the tap water to cool the Cold Finger after ensuring all tubing connections are tight. Check for leaks.
7.5 Turn power ON and set heater block temperature to 190°C and timer to 60 minutes.
7.6 When approximately 45mL of sample is distilled add 5mL of reagent water using a syringe by piercing the rubber
septum located on the top of the Distillation Head.
7.7 When 50mL of sample is collected in the Receiver Tube remove by unscrewing the cap containing the Short Stem.
7.8 When all samples have distilled turn the power OFF.
7.9 Add 5mL increments of reagent water to the Reaction Tube by piercing the septum using a syringe. Since the heater
block is still hot the distillation process will continue. Place a collection tray or beakers to catch any further distillate.
7.10 After each use clean exterior with a damp sponge.
7.11 When the heater temperature falls below 100°C, the next run can be started.
Note: If boil over occurs, add 2-3 drops of Antifoam B agent to the sample prior to distillation
METHOD:
Dải đo áp dụng 10 - 500 μg/L cho tổng phenols. Nồng độ cao hơn có thể được xác định bằng pha loãng mẫu.
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Bộ chưng cất MicroBlock-R đồng thời 10 mẫu Ammonia (0.01 - 2 mg/L), Hãng Environmental Express
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