Dipping chambers

The consumption of reagents is less particularly when series investigations are made (when the reagent is used repeatedly it is usual to cover the dipping chamber with a stainless steel lid). 

In spite of these acknowledged advantages, low volume dipping chambers and automated, time-controlled dipping apparatus (Fig. 40 and 41) have only been available commercially for a few years. 

Dipping chambers la 83 Dipping reagents la 82ff -, choice of solvent la 85 Dipropropretryn lb 207,208,230, 231, 413,414... 

Equipment for dipping TLC plates can be obtained in various forms. Until recently, dipping chambers suitable for manual dipping of 10 x 10 cm, 20 x 10 cm and 20 x 20 cm plates were often used. However, instructions in personal terms such as brisk , rapid or careful dipping cannot usually be exactly duplicated by another... 

In each individual case, the dwell time in the dipping chamber should be determined experimentally and documented in a testing procedure. 

After each dipping operation, the dipping chamber should be closed with a hd to prevent loss of solvent and to protect the enviromnent. 

Dipping solution Barium chloride (10 g) and calcium chloride (6 g) are dissolved in 220 ml 30 % acetic acid, mixed with 4 ml solution A and placed in the dipping chamber. 

Dipping chamber. This can be a made-to-measure glass container with dimensions approx 3x6x05 cm, or simply a plastic slide mailer... 

Melt a vial of diluted emulsion for 20 min at 45°C and pour it slowly into the dipping chamber placed in the 45 0 bath. Any air bubbles m the emulsion will lead to strong labeling artefacts Thus it is critical to allow the emulsion to sit for 30 min to let the bubbles float to the surface, and then remove them by dipping a few blank slides. 

The consumption of reagents is low because reagents are used repeatedly when not in use, the dipping chamber is always covered with a stainless steel lid. 

With dip biow moiding, the biow pin dips into the dip chamber [9j. After the neck ring is fiiied, the biow pin is puiied back. Axial variations in parison wall thickness can be achieved by programming the motion of the dip chamber piston. Figure 1.161 shows the production of the parison. The parison is then taken over by the blow mold, and the product is biown. After that, the blow pin is withdrawn, and the blow process is continued with an auxiliary blow pin. 

Plastic or glass dipping chamber, to fit a microscope slide with minimal waste of emulsion Rack for drying slides Water bath at 45°C... 

In the dark, with one safelight, melt an aliquot of the emulsion for 15 minutes in the 45 C water bath. Pour into a dipping chamber, prewarmed at 45 C, taking care to avoid forming bubbles. 

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