KHSN-3000TypeIsState-of-the-art sulfur-nitrogen analyzer, widely used for testing liquid, solid, or gas samples for sulfur content/Nitrogen content.

The instrument features include: one or two detection systems; based onWindows XP（7/VistaOperation software system; computer-controlled data collection, processing, and storage system; automatic sample loading system; etc.

Upon introducing the sample into the high-temperature pyrolysis furnace, an oxidation reaction occurs, the process of which is as follows:1As shown in the style illustration. In excess of1000At high temperatures of °C, the sample is completely vaporized and oxidatively cracked, resulting in reaction products including:CO₂，H₂O，·NO，SO₂and other oxidized products (hereinafter referred to as)MO_XQuantitatively converted in the samples.NOQuantitatively converted to sulfidesSO₂ The reaction gas is carried by the carrier gas, dried of its moisture in a desiccant, and then enters the reaction chamber.

⑴  R-N + R-S + O₂ ————> CO₂ + H₂O + ·NO + SO₂ +MO_X

By2) As can be seen, ·NOIn the reaction chamber with ozone generators fromO₃Gases react, transforming into an excited state.NO₂^*When the excited stateNO₂^*Photons are emitted when transitioning to the ground state, and the light signal is detected by a photomultiplier tube at a specific wavelength. Since the intensity of this chemiluminescence is proportional to the total nitrogen content in the original sample, the total nitrogen content can be determined by measuring the intensity of the chemiluminescence. This method can only detect nitrogen in a combined state, whereas atmospheric nitrogen, which is diatomic nitrogen,N₂Cannot be detected.

⑵ ·NO + O₃ ————> NO₂^* + O₂————> NO₂+hγ

SO₂Under the illumination of ultraviolet light at a specific wavelength, it is converted into an excited state.SO₂^*By (no Chinese content provided)3It can be seen that when in an excited state,SO₂^*Photoelectrons are emitted when transitioning to the ground state, and the light signal is detected by a photo multiplier tube at a specific wavelength. As the intensity of this fluorescence emission is proportional to the total sulfur content in the original sample, the total sulfur content can be determined by measuring the intensity of the fluorescence emission.

⑶  SO₂ + hγ^，————> SO₂^*————> SO₂ + hγ^，，

When using this instrument to analyze samples, first use sulfur.../A standard curve is prepared for nitrogen based on the standard sample. By referencing this curve, the sulfur content of an unknown sample can be determined./Nitrogen concentration.

 Measurement Range

Liquid:0.1mg/L-10000mg/L

Solid:1.0mg/kg-10000mg/kg

Gases:0.5mg/m³-10000mg/ m³

For concentrations greater than10000mg/LThe samples can be analyzed using the dilution method.

Lower Detection Limit

Detection limit for sulfur concentration:0.1mg/L

Detection Limit for Nitrogen Concentration:0.2mg/L

Linear Error Limit

1) 0.2mg/L≤Sample Concentration≤1.0mg/L At the time, ±0.2mg/L

2) 1.0mg/L＜Sample Concentration ≤100mg/L At the time, ±10％

3) 100mg/L＜Sample Concentration ≤6000mg/L At the time, it is ±5％

Repetitive Error Limit

1) 0.2mg/L≤Sample Concentration≤1.0mg/L At that time,cv Please provide the Chinese content you would like translated into American English. 0.35

2) 1.0mg/L＜Sample Concentration ≤100mg/L At that time,cv Please provide the Chinese content you would like translated into American English. 0.10

3) 100mg/L＜Sample Concentration ≤6000mg/L At that time,cv Please provide the Chinese content to be translated. 0.08