D3045R-6L
THERMO DIPA, diisopropylamine for the 2111LL and 1811 Retrofitted
With
the 2111 Series Thermo Orion switches to diisopropylamine, a/k/a/ DIPA, for increased sensitivity, and redesigns the reagent bottle
adaptor to accomodate a larger 70mm diameter. DIPA will raise the pH
well above 11 on plant cycle samples. Run at 25ml / minute you'll get
good good pH buffering; and , this can be checked by measuring the pH after a measurement, and it should be pH > 11.
According to Orion, DIPA has been proven to provide better low-level signal stability, and has additional benefits
over MEA reagent: Pure Di-isopropylamine (DIPA) Passively diffuses through silicone rubber tubing into sample, the 4-in (10-cm) length of tubing resides in head-space above liquid. MEA required 4 ft (1.33M) of tubing. Constant DIPA vapor pressure assures constant pH over life of reagent. Strength of DIPA as base varies inversely with temperature so pH remains constant even when temperature changes diffusion rate. DIPA is used to exhaustion so waste disposal is reduced. Lasts 60 days at 25 deg C.
Diisopropylamine [IUPAC name | N-isopropylpropan-2-amine] is a colorless, flammable, volatile liquid [19.4O F flash point] with an odor like that of ammonia. Flash point is the lowest temperature at which a liquid can form an ignitable mixture in air near the surface of the liquid. The lower the flash point, the easier it is to ignite the material.[for example, gasoline has a flash point of approximately -40 degrees C (-40 F)]. A closely related and less common term is fire point, the temperature at which the flame becomes self-sustained so as to continue burning the liquid (at the flash point, the flame does not need to be sustained). The fire point is usually a few degrees above the flash point.
The air odor threshold concentration for DIPA is 1.8 parts per million (ppm) parts of air. Vapor pressure at 20 degrees C (68 degrees F): 60 mm Hg. It is corrosive as well as flammable. The point being...It is a personnel hazard, as well as a fire hazard. Diisopropylamine is a severe eye irritant, and exposure to high concentrations is expected to cause pulmonary irritation and edema. Workers exposed to concentrations ranging from 20 to 50 ppm reported haziness of vision. Another good run-down more from NFPA slant on the characteristics of diisopropylamine. The bottle is heavy duty, and coated with PVC for drop/spill prevention. Changeout is the goal here. Order the D3045R-6L, which is Reagent only; or, the D3045-6L with diffusion tubing.PRICE LIST FOR 2111
The 2111XP Series utilizes Ammonium Hydroxide, ACS in a 2L Rectangular Leak-proof Bottle.Two different packages are available depending on the range. The difference is in the diffusion tubing kit supplied. These are listed on the price list linked above.
| DS&M-Scientific developed independently, a diffusion tubing set-up that is amazingly similar the latest version Thermo Orion.
Ours is simple and with fewer parts.We offer two different kits for the 2111LL reagent bottle adaptor. One is for retrofitting to the new reagent bottle adaptor, and one for a yearly change-out supply. This version of diffusion tubing from Thermo is on a recommended
monthly changeout cycle. Then why is DIPA packaged with only six?
We offer the six pack with a full compliment of barb adaptors as a direct cross reference to the Thermo product. And we offer a true annual
maintenance pack for quick monthly change-out. We sell the DIPA separately so you can choose the right diffusion tubing kit(s) for your operation.
According to Thermo Orion in this ThermDTpdf the diffusion tubing should be changed out monthly; yet only Six(6) DT kits are included with their DIPA.
Those white polypropylene plastic caps give it a nice clean look but impairs visual inspection of the connection. Since the diameters of the "cinch" and cap are much different, there is no additional holding action. The result is one ends up with extra caps, extra polyethylene barb adaptors, extra white polypropylene connectors, and not enough 4-inch diffusion tubing.
It's this?  .... versus the above Whatever happened to KISS? TO's down to 7 parts from
what, 14? They are still selling you too many parts.
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