Metrohm TitrIC pro I - Manual (Page 6)

Application Bulletin 353
Installation Instructions of TitrIC pro I
Page 6 of 14
 Port 1 is used for transferring the sample to the
external titration vessel using FEP-tubing 6.1805.110
(80 cm, supplied by the 815 Sample Processor)
 Port 2 is used for aspirating the sample via conductivity
flow through cell which is connected to the titration arm.
The FEP-tubing 6.1805.110 is used here (80 cm, again
supplied by the 815 Sample Processor).
 Port 3 is used by for sample transfer to the IC system.
The transition from M6 to the IC screw size (1/16 in.) is
achieved with the 6.2744.080 adapter. A PTFE-capillary
(0.75 mm ID) is used to aspirate the sample from the T
piece at the swing arm through the anion injection valve
into the 50 mL Dosino. At the T piece the adapter M6
thread to UNF 10/32 (6.2744.080) is used.
 Port 4 requires a coupling between Luer and M6
(6.1808.280): This port is used for emptying the Dosing
Unit into the waste canister. Herefore the FEP-tubing
(6.1805.030) with 150 cm length is used.
Once the tubing connections have been made, the Dosing
Unit is attached to the Dosino holder (6.2057.210) with the
thread adapter 6.1618.020.
4.3 Overview of all the tubing connections
The three 60 cm FEP-tubing connections
(6.1850.060, supplied with the 815) are used to
connect the membrane pump 1 / tower 1 of the 815
and the three rinsing nozzles (6.2740.020, supplied
with 815) to the openings 1,3, and 5 of the external
cell (see chapter 4.1).
The 60 cm M8-PTFE-tubing connection
(6.1805.510) is used to connect the membrane
pump 2 / tower 1 of the 815 and the M8-PTFE-
aspiration tip (6.1543.170) to the opening 7 of the
external cell (see chapter 4.1).
The Robotic Arm (6.1462.040) is equipped with a
PEEK aspiration tube (6.1835.050). The aspiration
tube can be mounted using the screw nut
(6.2629.000) and the needle holder (1/8 in with
tubing connection M6, 6.2833.020). The coupling
piece with two outer M6 connections (6.1808.010)
is used to connect the needle to the T Connector
M6 (6.1808.060).
Two 80-cm-FEP-tubing connections (6.1850.110)
are used to connect the T piece (6.1808.060) at
the robotic arm with the flow through cell
(6.2763.000) for the conductivity measurement and
the flow through cell with the 50 mL Dosino at Port
2. The third 80-cm-FEP-tubing (6.1850.110,
supplied with the 815) is used to connect the 50
mL Dosino Port 1 to the external titration vessel at
the left of the 815.
The 40-cm-FEP-tubing connection (6.1805.100,
supplied with the Dosing Unit) is used to connect
port 1 of the 20 mL Dosing Unit (0.1 mol/L HCl)
with the 3-way stopper in the external cell (opening
6 in chapter 4.1)
The 150-cm-FEP-tubing connection (6.1805.030)
is used to connect port 4 of the 50 mL Dosing Unit
to the 10 L PE waste canister (6.1621.000,
supplied with the 815).
The 60-cm-FEP-tubing connection (6.1805.060) is
used to connect port 1 of the 10 mL Dosing Unit
(0.05 mol/L Na
2
EDTA) the external cell (opening 6
in chapter 4.1).
The 60-cm-FEP-tubing connection (6.1805.060) is
used to connect port 1 of the 20 mL Dosing Unit
(0.2 mol/L TRIS / 0.1 mol/L acetylacetone) with the
external cell (opening 2 in chapter 4.1).
Suitable lengths of the 0.97 mm PTFE capillary
(6.1803.020, supplied with the 881) are used to
connect port 3 of the 50 mL Dosing Unit (using the
screws 6.2744.080 and 6.2744.070) and the
injection valve of the 881 Compact IC pro
instrument that is again connected to the T-piece
(6.1808.060) at the robotic arm (using the screws
6.2744.080 and 6.2744.070). In this setup and
methods the following sequential arrangement was
implemented: T-piece – anion injection valve – 50
mL Dosino.
5 Miscellaneous
5.1 Membrane Pumps of the 815
The membrane pump 1 at tower 1 is used to supply the DI
water for rinsing of the external vessel; the membrane pump
2 is used for emptying the external vessel.
Connect the membrane pump 2/tower 1 to the left connector
of the Distributor leading to the M8 aspiration tip for
emptying the external vessel. The upper part of the
membrane pump 2 is connected to the waste canister.
The upper part of membrane pump 1 is connected to the
right connector of the Distributor leading to the three M6
rinsing nozzles to rinse the external vessel. The lower part
of the membrane pump 1 is connected to the DI-water
canister.
5.2 Stirrer
The 802 Rod Stirrer is inserted through opening 9 of the
external cell and connected to the tower 1 of the 815. The
propeller (6.1909.050) is pushed on from below.