Shimadzu LCMS-8045 User Manual

2 Installation Conditions
LCMS-8045/8050 Pre-Installation Requirements
10
2.9 Gas
A nitrogen gas is used as the nebulizer/drying gas, a dry air is used as the heating gas and Ar (Argon) is used as the CID gas.
As for the gas source of supply of the nitrogen/dry air, use of a nitrogen/dry air gas generator is recommended (*1,2).
Please consult us when using a customer's facility (e.g. a centralized piping, a liquid nitrogen, a gas cylinder and so on).
Note that the argon gas is supplied from a gas cylinder only.
*1 Use of gas generators is recommended because of avoiding extra work such as replacing cylinders for daily
maintenance.
*2 Some nitrogen generator support a function which generates a dry air. The nitrogen generator that we recommend has
supported the function(see 2.9.1.1). When using customer's gas generator, confirm that the function of generating the
dry air is available.
* Precautions When Using APCI and DUIS
When using high-purity nitrogen gas (e.g. gas cylinder or liquid nitrogen) and acetonitrile for mobile phase, polymers
derived from carbon are sometimes formed on the needle tip and might cause sensitivity to become unstable. (This does
not necessarily happen when a nitrogen gas generator is used or methanol is used for the mobile phase.)
If this happens, polymer formation can be prevented by using a dry air (or a synthetic air) as the nebulizer gas.
Gas
Supply
Pressure
Gas Flow Rate (*4)
Type
Purity
Max. Value
(Reference)
At normal use
ESI
APCI
DUIS
Micro
ESI
Nitrogen
gas
N2
In case of nitrogen gas generator
97.0 % or more
other than those above(gas
cylinder, liquid nitrogen,etc )
99.5 % or more
(*1)
690 to 800
(kPa)
(*4)
Nebulizer gas (L/min)
(ESI/DUIS/MicroESI) 3.0
(APCI) 4.4
3.0
3.0
2.0
1.5
Drying gas (L/min)
20.0
(*5)
10.0
5.0
10.0
OFF
Dry air
(*2)
Water‐free,Oil-free
(In case of gas generator)
(*3)
690 to 800
(kPa)
(*4)
Heating gas (L/min)
20.0
(*5)
10.0
-
10.0
3.0
Argon
gas
99.99 % or more
500 to 800
(kPa)
CID gas
450 (kPa)
LCMS-8045: 230 (kPa)
LCMS-8050: 270 (kPa)
See * 2.9.2
*1 Organic-free nitrogen gas
*2 Use of a hydrocarbon trap is recommended.
*3 When using a gas cylinder for synthetic air, 690〜800(kpa) is required for the supply pressure where an
atmospheric composition needs CO:less than 1ppm, CO2:less than 1ppm, HC:less than 1ppm,
H2O:-50℃(dew point).
*4 When supplying gas to other equipment as well, sufficient care must be paid to equipment used and
amounts of gas used since drops in the supply pressure can cause the flow rate to drop.
*5 The maximum flow reaches 20L/min in total as the default setting, whose value is disable and variable,
where the flow is the sum of the drying gas and the heating gas.
e.g. When setting 10L/min as the drying gas, the heating gas is available for 10L/min or less. Moreover
when turning off the drying gas, the heating gas is available for 20L/min or less.

Shimadzu LCMS-8045 Specifications

General

Brand	Shimadzu
Model	LCMS-8045
Category	Laboratory Equipment
Language	English