TorchIt is composed of three concentric quartz tubes, each with three inlet pipes that respectively introduce three streams of air: cooling gas, auxiliary gas, and carrier gas. Cooling gas is also known as plasma gas. Carrier gas, also known as injection gas or atomization gas, atomizes the test solution and sends the aerosol into the ICP light source. The ideal ICP torch tube should be easy to ignite, saving working gas and ensuring flame stability. The drawback of a universal ICP is its gas consumption, which can easily burn out if the cooling air flow rate is reduced. Only by maintaining a balance between high-frequency input power and plasma energy consumption can the ICP torch flame be stable. The input power of plasma is generally around 1000W. Plasma gas is generally 750L/h.

Quartz cleaning

The cleaning method is to use acid soaking treatment. Inorganic can be soaked in 20-40% nitric acid. Organic hot soap solution soaked in water or organic solvent (kerosene). Be careful to remove the upper trachea before adding acid to prevent tracheal corrosion.

install

Install gas pipeline pipe a Loosen the tightening nut; b. Insert vertically, with the middle tube opening about 3-5mm away from the lower edge of the RF coil; c. Lock the nut tightly.

maintain

Under high-power conditions, there should be auxiliary gas to avoid burning the central tube.

2. If the flame cannot escape from the tube during ignition, the fire should be immediately stopped and checked for water or insufficient power inside.

When injecting fluorine-containing samples, apply.

When applied to different samples, different central tubes should be selected.

5. For alkaline high salt samples (such as chlor alkali industry pH 9-10), the lifespan should be reduced by increasing the carrier gas pressure (flow rate) and regularly cleaning the outer tube.

clean

Firstly, open the fume hood to avoid choking on concentrated acid; Open the electric heating plate and set the temperature.

Secondly, place the heart in an empty PTFE beaker (it is recommended not to use too much, as it may not be easy to remove the boiled one; nor too much, as the heated area and temperature may not rise), with the plasma generation point facing upwards. As it is very brittle and expensive, costing tens of thousands of yuan each, it must be handled with care.

Then, add aqua regia to the beaker and let it pass. Cook on an electric heating plate at 120 ℃ -150 ℃ for at least 12 hours. Remember: Ensure that the acid solution does not boil or splash out, which can corrode the electric heating plate and pose a danger. I usually cook for 24 hours or more.

Then, put on gloves and take it out, put it in a plastic container containing cold water (tap water is sufficient) (the container should be able to hold it at least, not too much).

Take off your gloves, because wearing them feels slippery, and if you're not careful, you'll sell the carefully cared for ones. Directly hold the water that has been soaked in cooling water and rinse it under tap water. Sometimes, the yellow layer is directly washed away by water.

Rinse with MQ-H2O, dry with high-purity argon gas, wrap in dust-free paper for storage, and set aside for later use.

Afterwards, pour the aqua regia from the beaker into the stored jar to avoid splashing and causing trouble or injury. Turn off the fume hood and electric heating plate.

Application scope

1. Analysis of steel and its alloys: including carbon steel, cast iron, alloy steel, high-purity iron, ferroalloys, etc.

2. Analysis of non-ferrous metals and their alloys: including non-ferrous metals and their alloys, rare metals and their alloys, precious metals, rare earth elements and their compounds.

3. Analysis of water quality samples: including drinking water, surface water, mineral water, high-purity water, and wastewater.

4. Analysis of environmental samples: including solid waste, soil, fly ash, airborne dust, etc.

5. Analysis of geological and mineral samples: including geological samples, ores, and minerals.

6. Analysis of animal, plant and biochemical samples: including plants, traditional Chinese medicine and animal tissues, biochemical samples, etc.

7. Analysis of nuclear industry products: including nuclear fuel, nuclear materials, etc.

8. Analysis of food and beverages: including food, beverages, etc.

9. Analysis of chemical products: including chemical reagents, chemical products, inorganic materials, cosmetics, oils, etc.