Description

 

Atomfair-Cd-516 High Sensitivity Rapid Cadmium Analyzer (Flame Atomic Fluorescence Spectrometer)

I. Product Overview

Atomfair-Cd-516 High Sensitivity Rapid Cadmium Analyzer is a special instrument designed for disease control, food and drug, grain and oil, agriculture, quality inspection and other industries, focusing on the accurate determination of cadmium element in food, grain and other samples, especially suitable for the rapid detection of cadmium element in rice. Based on flame atomic fluorescence spectrometry technology, the instrument breaks through the limitations of traditional detection methods, with core advantages of high sensitivity, good stability, fast testing speed, low use cost and simple pretreatment, providing an efficient and reliable solution for cadmium element detection.

II. R&D Background and Detection Principle

(I) R&D Background

In recent years, food safety problems caused by cadmium pollution have occurred frequently. Cadmium enters the environment through wastewater discharge and invades crops through irrigation, and rice is the most typical crop affected. Long-term consumption of cadmium-containing food by the human body can cause itai-itai disease (osteocarcinoma), which is extremely harmful. Traditional cadmium element detection methods have problems such as long pretreatment time and general instrument stability, which are difficult to meet the needs of emergency detection and batch sample detection. Atomfair-Cd-516 High Sensitivity Rapid Cadmium Analyzer came into being under this background.

(II) Detection Principle

Liquid samples are atomized by a high-efficiency atomizer to form aerosols, which are fully mixed with fuel gas in a premixed atomization chamber. Then the samples entering the flame are evaporated, melted and decomposed into ground-state atoms by the heat of combustion. The ground-state atoms are excited to high-energy state by high-performance hollow cathode lamp. The atoms in high-energy state are unstable and emit atomic fluorescence in the form of light radiation during the de-excitation process. The intensity of atomic fluorescence is directly proportional to the content of the measured element in the sample, and the content of cadmium in the sample can be accurately determined according to this.

The product complies with the international standard T/CAIA/S11-2018 (Cereals-Determination of cadmium-Dilute acid extraction with flame atomic fluorescence spectrometry), ensuring the professionalism and universality of detection results.

III. Core Technical Indicators

1. Sensitivity: 0.002ng/mL, the detection accuracy is far higher than traditional methods, which can accurately capture trace cadmium elements
2. Stability: Relative Standard Deviation (RSD) < 0.6%, the detection results have strong consistency
3. Testing speed: It only takes 10 seconds to test a single sample, which efficiently adapts to the needs of batch detection
4. Use cost: The test cost of a single sample is only 0.1 USD, which greatly reduces the long-term detection expenditure
5. Pretreatment efficiency: The pretreatment process only takes about 5 minutes, with simple and fast operation

IV. Simplified Pretreatment Process

The whole pretreatment process does not require complex operations and can be completed in only three steps:

1. Sampling: Select representative samples
2. Extraction: Add dilute acid for extraction
3. Separation: Shake well and centrifuge for 5 minutes, take the supernatant for direct testing

V. Instrument System Composition

(I) Sampling System

Adopt customized high-efficiency atomizer to realize continuous sampling through air negative pressure lifting, equipped with water seal module pressure self-balanced waste liquid discharge design, no additional pump is needed to assist waste discharge, and the operation is more convenient.

(II) Transmission System

An innovative new transmission device is adopted to replace the traditional pipeline transmission, which can fully mix the aerosol formed by atomization and then accurately send it to the atomizer, effectively improving the atomization efficiency and ensuring the detection accuracy.

(III) Atomization System

Equipped with double-layer multi-head quartz atomizer, propane is used as fuel gas for atomization reaction, which significantly improves the atomization efficiency and further enhances the test sensitivity.

VI. Core Functional Characteristics

1. Detection mode: Support single-channel detection and single-channel enhanced detection to adapt to different detection needs
2. Correction function: With standard curve correction function to ensure the accuracy of detection results
3. Interference treatment: With built-in background interference deduction function to effectively eliminate the influence of irrelevant factors
4. Convenient operation: Support automatic ignition, equipped with flame observation window for real-time observation; the three-dimensional adjustment mechanism can adjust the three-dimensional parameters of the atomizer online with flexible operation
5. Waste liquid treatment: Pressure self-balanced waste liquid discharge with automatic alarm function for waste liquid overflow, safe and reliable
6. Software support:
   • Friendly operation interface, can recommend the best instrument test conditions, support graphic display, playback, statistics and query of test data
   • Support page saving, output, backup and printing of graphics and data, the suspended measurement window can display more information such as fluorescence intensity and blank value
   • The test data interface can be flexibly edited, the sample number, conversion coefficient, sample weight and other items can be freely edited before and after the test, and the conversion is completed automatically
   • Audit trail function can be upgraded to meet higher compliance requirements
7. Safety protection: With instrument self-test and gas cut-off early warning protection functions to fully ensure the safety of the detection process

VII. Performance Comparison Advantages

 Comparison of Test Speed

Testing Method	Testing Process	Total Time per Sample (seconds)
ICP-MS Method	Sampling (including rinsing), testing, reading (including sample change)	30
Graphite Furnace Atomic Absorption Method	Drying, ashing, atomization, sampling	63
Flame Atomic Fluorescence Method (This instrument)	Sampling (including sample change), integration	14

VIII. Standard Sample Test Data (Partial)

Standard Sample No.	Standard Value (mg/kg)	Uncertainty (mg/kg)	Test Result (mg/kg)	Relative Error (%)
GBWE(E)100362	0.007	0.003	0.006	-14.3
GBWE(E)100359	0.030	0.004	0.030	0.00
GBWE(E)100361	0.11	0.01	0.11	0.00
GBWE(E)100360	0.22	0.02	0.21	-4.55
GBWE(E)100351	0.42	0.02	0.41	-2.38
GBWE(E)100358	0.62	0.03	0.62	0.00
GBWE(E)100355	0.99	0.03	0.98	-1.01
GBWE(E)100354	1.28	0.03	1.27	-0.78
GBWE(E)100356	1.72	0.06	1.72	0.00
GBWE(E)100357	2.16	0.06	2.18	0.93

 

Note: The test data shows that the deviation between the detection results of the instrument for standard samples with different concentrations and the standard values is small, and the detection accuracy is high.

If you’re interested, have any questions, or have specific customization requirements, please feel free to contact us at inquiry@atomfair.com.