Environmental Express MicroBlock-R System with Phenol Glassware; 240V

Item #: C5230-240 MicroBlock R w/ 10 sets Phenol Glassware, 240v

Chi tiết thông tin về thành phần như sau:

#1. Bộ gia nhiệt

C5231-240 MicroBlock™-R, Block Only, 240 VAC

(adjustable digital temperature control with LCD readout and timer, Includes a flow meter to monitor cooling water rates)

II. Bộ thuỷ tinh

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.

• - Phương pháp chưng cất Phenol theo US EPA Method 420.4 : Xác định tổng lượng phenolic có thể thu hồi bằng phương pháp đo màu bán tự động https://www.epa.gov/sites/default/files/2015-08/documents/method_420-4_1993.pdf
• - Phương pháp thử nghiệm SW-846 9065: Phenolics (Đo quang phổ, 4-AAP thủ công với chưng cất) SW-846 Test Method 9065: Phenolics (Spectrophotometric, Manual 4-AAP with Distillation)
• - Phương pháp chưng cất mẫu cho xác định Phenol theo US EPA Method 420.4 và SW-846 method 9065. Tất cả các phương pháp này cho phép xác định phenol trong nước uống (drinking); nước ngầm (ground); nước mặt (surface), và nước biển (saline waters), nước thải sinh hoạt; nước thải công nghiệp và đất (soil).