Second hand ICP-MS inductively coupled plasma mass spectrometer

NegotiableUpdate on 01/22

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Overview

ICP-MS ， The full name is Inductively coupled plasma mass spectrometry, which refers to inductively coupled plasma mass spectrometry. Composed of ICP torch, interface device, and mass spectrometer. The ionization source used in ICP-MS is inductively coupled plasma (ICP), which is the same as the ICP n used in atomic emission spectrometers. Its main body is a torch tube composed of three layers of quartz sleeves. The upper end of the torch tube is wound with a load coil, and the three layers of tubes are respectively supplied with carrier gas, auxiliary gas, and cooling gas from inside to outside. The load coil is coupled by a high-frequency power supply

Product Details

Second hand ICP-MS inductively coupled plasma mass spectrometerThe ionization source used is inductively coupled plasma (ICP), which is used in conjunction with the ICP used in atomic emission spectrometers

working conditions

Folding ICP

Mainly including ICP power, carrier gas, auxiliary gas, and cooling gas flow rate. The sample lifting amount, etc., the ICP power is generally around 1KW, the cooling gas flow rate is 15L/min, and the auxiliary gas flow rate and carrier gas flow rate are about 1L/min. Adjusting the carrier gas flow rate will affect the measurement sensitivity. The sample lifting amount is 1ml/min.

interface device

The ions generated by ICP enter the mass spectrometer through an interface device. The main parameter of the interface device is the sampling depth, which is the distance between the sampling cone and the flame torch. The distance and alignment of the two cone holes need to be adjusted, and the lens voltage needs to be adjusted to ensure good focusing of the ions.

Folding mass spectrometer

Mainly to set the scanning range. In order to reduce the interference of air components, it is generally necessary to avoid collecting N2, O2, Ar plasma. When conducting quantitative analysis, mass spectrometry scanning should select a mass without interference from other elements and oxides.

At the same time, there should be a suitable multiplier voltage.

working conditions

Folding ICP

Folding interface device

Folding mass spectrometer

At the same time, there should be a suitable multiplier voltage.

In fact, before each analysis, it is necessary to test the overall performance of the instrument with a multi-element standard solution. If the sensitivity of the instrument can reach the expected level, the instrument no longer needs to be adjusted. If the sensitivity is low, parameters such as carrier gas flow rate, cone hole position, and lens voltage need to be adjusted.

It is the same. Its main body is a torch tube composed of three layers of quartz sleeves. The upper end of the torch tube is wound with a load coil, and the three layers of tubes are respectively supplied with carrier gas, auxiliary gas, and cooling gas from inside to outside. The load coil is powered by a high-frequency power supply coupled to generate a magnetic field perpendicular to the plane of the coil. If argon gas is ionized by a high-frequency device, argon ions and electrons will collide with other argon atoms under the action of an electromagnetic field, producing more ions and electrons and forming eddy currents. The strong current generates high temperature, instantly causing argon gas to form a plasma torch with a temperature of up to 10000k. The sample brought into the plasma torch by the carrier gas undergoes evaporation, decomposition, excitation, and ionization. The auxiliary gas is used to maintain the plasma, requiring approximately 1 L/min. The cooling air is introduced into the outer tube in a tangential direction, generating a spiral airflow that cools the inner wall of the outer tube at the load coil. The cooling air flow rate is 10-15 L/min.

　Second hand ICP-MS inductively coupled plasma mass spectrometerThe injection method is to use a concentric or right angled pneumatic atomizer to generate aerosols, which are then sprayed into a flame under a carrier gas belt. The sample injection rate is approximately 1 mL/min, and it is pumped into the atomizer by a peristaltic pump.

At a distance of about 10 mm above the load coil, the flame temperature is approximately 8000 K. At such high temperatures, elements with ionization energies below 7 eV undergo ionization, while elements with ionization energies below 10.5 eV have ionization degrees greater than 20%. Due to the ionization energy of most important elements being below 10.5 eV, they have high sensitivity, while a few elements with higher ionization energy, such as C, O, Cl, Br, can also be detected, but with lower sensitivity.

ICP-MS consists of three parts: an ICP torch, an interface device, and a mass spectrometer; If it is to have a good working condition, the working conditions of each part must be set.