Collecting funnels

A hydrolysis unit is constructed using the commercially available glassware shown in Figure 2. The collection funnel should be calibrated and marked for volumes of 35 and 85 mL. All 20/40-glass joints of the hydrolysis unit should be assembled with Teflon sleeves and secured with spring clamps to prevent loss of the volatile EMA and HEMA analytes. 

Figure 10 (a) Rising-droplet apparatus and (b) Venturi tube for droplet mass transfer experiments. (1—feed storage, 2—metering pump, 3—double-flow valve, 4, 5—pumps, 6—heat exchanger, 7—collecting funnel, 8—stream to analysis, 9—valve). 

C), where it is condensed. The condensed solvent drips into the collecting funnel... 

Connect the condenser to the top of the extractor and be sure the entire apparatus is vertical so the condensate will drip into the collection funnel. If grease is used, only a very thin film is necessary. 

Watch the extractor to ensure that it is working properly. The ether should start to boil in a few minutes. Once it begins to condense in the condenser, be sure it drips into the collecting funnel. Adjust the tilt of the apparatus to make it work properly. 

A number of apparatuses were constructed for this purpose [257-264], some of which are commercially available. Here we describe the apparatus marketed by LKB (Bromma, Sweden) (see also Ref. 264) (Fig. 6.26). The apparatus consists of a inverted U-shaped tube that is composed of two parts connected by a joint in the upper part. One limb accommodates the electrophoresis column that is surrounded by a covering jacket, the other limb filled with buffer serves to make connection with the electrode vessel. At the lower end of the column a collecting funnel is attached. Liquid connection or disconnection between the two limbs can be done through a ground female joint. The stopcock above this joint connects the system to a buffer reservoir when the column is washed or when the zones are eluted. In the male joint of the top piece there is a hole that allows liquid to pass to the other limb. By turning the liquid stream can be disconnected at this point. The column size is 55 X 2 cm Sephadex or cellulose serve as the supporting material. Separation is run at 500-1000 V and 25-50 mA. 

For the MAP3S sites, an automatic wet-only sampler is used to collect event samples, where event refers basically to a daily sample. The collecting funnel is thoroughly rinsed after each... 

Figure 4-, Modified Hubbard-Brook sampler used to collect precipitation samples. The diameter of the collecting funnel is 28 cm.

Fig. 3. Device for collecting the freely rising gases. 1, 2, 3) = gas-tight ground stopcocks 4) = gas-water collecting vessel made of PVC 3) = gas collecting funnel with lead rings for weight 6) = gas collecting flask ...

Disposal to Oily Water Sewer (OWS) A process oil water sewer system is a convenient location to direct oily waste from process systems including thermal relief outlets. The oily water system normally collects fluids and directs them to the local sump. If several lines connect into a common OWS header, care shoifld be taken to prevent backflow into another outlet source. In such cases, use of air gap, i.e., drainage into a collection funnel, has been advantageous. 

Collection funnels used to guide flowing liquid into a pan should extend to the bottom of the pan to help prevent electrostatic discharge. 

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