Lab chemical instruments
Lab chemical instruments refer to specialized equipment, devices, or tools used in chemical experiments, analytical testing, and scientific research for the preparation, separation, purification, reaction, analysis, measurement, and data processing of substances. They form the fundamental infrastructure of a chemistry lab and are essential for conducting qualitative and quantitative studies, validating chemical theories, and discovering new substances.
We offer a wide range of laboratory chemical instruments, including equipment for nutritional component analysis (Total Nitrogen, Fat), soil fertility and property analysis (CEC), sulfide analysis, spectroscopic analysis, as well as auxiliary devices such as gas generators , exhaust treatment units and Digestion Furnaces
Major Application Areas
| Food & Feed | Protein content (core application); other nitrogen-containing components |
| Agriculture & Environment | Nitrogen content in soil/fertilizers (for fertilization guidance); Kjeldahl nitrogen in water bodies |
TKN VS TN
Kjeldahl Nitrogen (TKN) = Organic nitrogen + Ammonia nitrogen.
Total Nitrogen (TN) = Kjeldahl nitrogen (organic N + ammonia N) + Nitrate nitrogen + Nitrite nitrogen.
Meaning:
TKN mainly reflects organic nitrogen and ammonia nitrogen in water bodies, originating from biological metabolism and wastewater discharge. It is an important parameter for assessing organic pollution from domestic sewage and agricultural runoff. TN, on the other hand, is a comprehensive indicator used to evaluate water eutrophication.
Primarily used to extract fat from solid or semi-solid samples using solvent extraction. The results are accurate and authoritative, making it a reference method in many standards.
A precision instrument specifically designed for the automated and standardized determination of soil CEC values.
Soil Cation Exchange Capacity (CEC)
CEC is a key indicator of soil fertility and buffering capacity. It refers to the total amount of exchangeable soluble cations that a unit mass of soil can adsorb and exchange under specified pH conditions.
Used to determine the sulfide content in water, wastewater, soil, or industrial samples for environmental and chemical analysis. It accurately measures the total volatile sulfides in the sample, expressed in the form of sulfur dioxide.
Spectral Analyzers
Measures the absorbance of molecules or ions in a solution at specific wavelengths. The signal originates from electronic, vibrational, or rotational transitions of the molecules.
Measures the absorption of light at element-specific wavelengths, emitted by a hollow cathode lamp, by ground-state free atoms generated at high temperatures.
Measures the intensity of fluorescent photons emitted by excited atoms as they return to the ground state after being excited by a characteristic light source. The signal is related to the excitation light intensity and the atomic concentration.
Measures the intensity of full-spectrum characteristic light emitted by atoms/ions excited in the high-temperature ICP plasma.
Measures the ions generated in the ICP source, which are separated by mass-to-charge ratio in a mass analyzer, with the signal recorded as ion counts (intensity).
| Instrument | Core Measurement | Quantitative Analysis Capability | Qualitative Analysis Capability |
| Spectrophotometer | Absorbance of molecules at specific wavelengths | Excellent. Based on the Beer–Lambert law, a classic quantitative tool. | Limited. |
| Atomic Absorption Spectrometer (AAS) | Absorption of characteristic spectral lines by ground-state atoms | Very excellent. High sensitivity and accuracy; a classic method for elemental quantification. | Almost none. |
| Atomic Fluorescence Spectrometer (AFS) | Fluorescence intensity emitted by excited atoms during de-excitation | Outstanding. Ultra-high sensitivity for specific elements (e.g., As, Hg, Se) with a wide linear range. | Almost none. |
| Inductively Coupled Plasma Optical Emission Spectrometer (ICP-OES) | Intensity of characteristic light emitted by excited atoms/ions | Excellent. Can measure multiple elements simultaneously or sequentially, with wide dynamic range and fast speed. | Excellent. Full-spectrum scanning allows qualitative screening of elements in samples. |
| Inductively Coupled Plasma Mass Spectrometer (ICP-MS) | Mass-to-charge ratio and signal intensity of ionized atoms | Top-tier. Lowest detection limits, extremely wide linear range, capable of isotope analysis. | Excellent. Elements and isotopes can be identified via mass-to-charge ratios, including unknown elements. |
Auxiliary Laboratory Chemical Instruments
Used in sample pretreatment to provide a stable gas environment.
Treat the waste gases generated during experiments.
The core function is to use strong acids and high temperatures to convert target substances in complex samples into a homogeneous solution suitable for analysis.
| Analysis / Instrument Type | Nitrogen Generator (N₂) | Hydrogen Generator (H₂) | Oxygen Generator (O₂) | Oil-Free Compressed Air | Exhaust Treatment System | Digestion Furnace (Digestion Block) |
| Kjeldahl Nitrogen Analyzer | — | — | — | — | Treats acidic exhaust gases from Kjeldahl digestion | Sample digestion for Total Nitrogen (Kjeldahl) |
| CEC Analyzer | — | — | — | — | Neutralizes acidic gases from soil digestion | Acid digestion of soil samples (for metal/CEC pretreatment) |
| Sulfide Analyzer | — | — | — | — | Treats H₂S and acidic/irritant gases | Suitable for pre-oxidation treatment of certain sulfides |
| Spectral Analysis (AAS, ICP, FTIR) | ICP purge/carrier gas; FTIR purge | — | Some ICP processes require auxiliary oxygen | AAS nebulizer compressed air; FTIR purge | Neutralizes acidic exhaust from ICP/AAS | Acid digestion of ICP/AAS samples |
| Chromatography (GC, LC-MS) | GC carrier/purge gas; LC-MS nitrogen source | GC-FID combustion gas | — | Some GC systems require clean air | — | — |
| Electrochemical Analyzer | Can be used under inert atmosphere | — | — | — | — | — |
| Water Quality Analyzer (COD, TN, TP, etc.) | — | — | — | — | Treats exhaust from COD/TN/TP digestion | Used for digestion of COD, TN, TP |
