Key words: ST109C food sulfur dioxide analyzer; ST109C food sulfur dioxide analyzer; ST109C traditional Chinese medicine sulfur dioxide analyzer; ST109C traditional Chinese medicine sulfur dioxide analyzer
New national standard food sulfur dioxide ("Chinese Pharmacopoeia" method to detect sulfur dioxide in traditional Chinese medicine) supporting special equipment: ST109A, ST109B, ST109C, ST109D are all standard equipped with automatic reagent addition and automatic nitrogen blowing control function (the first in the country)! ! !
Completely faithful to GB5009.34-2022 "Determination of Sulfur Dioxide in Food"; 2015 and 2020 editions of "Chinese Pharmacopoeia" statutory testing methods,
It can batch 8 samples at a time, automatic timing reflux, automatic acid addition, automatic nitrogen blowing, high cost performance! It is suitable for all levels of food, traditional Chinese medicine inspection and testing, customs, food and traditional Chinese medicine processing enterprises, scientific research institutes of colleges and universities, etc.
?Instructions for use
GB5009.34-2022 "Determination of sulfur dioxide in food"; 2015 and 2020 editions of "Chinese Pharmacopoeia" detect sulfur dioxide residues in Chinese medicinal materials and decoction pieces
GB5009.34 and the 2015 edition of "Chinese Pharmacopoeia" stipulate three detection methods for sulfur dioxide: acid-base titration, spectrophotometry (food)/gas chromatography (traditional Chinese medicine), ion chromatography, etc. Spectroscopic/gas phase and ion chromatography have the advantages of high sensitivity and strong specificity, but the equipment is expensive, which is not conducive to the popularization and use of grass-roots food and drug inspection systems;
The acid-base titration method has the advantages of simple device and low cost, and is the legal detection method stipulated by the national food standard and pharmacopoeia. However, since they are all glass instrument devices that only describe the method, the purchase, assembly and implementation of the entire set of devices still need to be continuously improved. For example: (1) In addition to the glass instrument device, magnetic stirring, electric heating mantle, titration platform, nitrogen device with flow meter, etc. should be equipped and assembled. Many units feel that the purchase of equipment is cumbersome and difficult to assemble and implement, so they cannot carry out this detection method; (2) The assembled devices are varied, and there are unstable nitrogen flow rates, uneven heating, easy gas leakage, and easy bumping during use. , easily affected by the cooling water source, etc., which lead to the phenomenon of poor parallelism and low recovery rate that directly affect the test results; (3) The work efficiency is low, the current equipment adopts a single device, which is difficult to process multiple samples at the same time. The simultaneous testing of secondary medicinal materials is time-consuming and labor-intensive.
Instrument innovation (1) Heating, distillation reflux, automatic acid addition, cooling, nitrogen blowing control, magnetic stirring, receiving seven integrated design; (2) The far-infrared ceramic heating device is used to replace the ordinary electric heating furnace or electric heating mantle, which is more energy-saving, has good waterproof effect and is resistant to acid and alkali corrosion; (3) Through the front LCD touch screen, the functions of nitrogen blowing before acid addition, automatic acid addition, and automatic nitrogen start control can be realized;
(4) 8 samples can be made at one time, and the heating power can be adjusted per hole;
(5) Automatic nitrogen control function, nitrogen flow can be adjusted independently per hole (60-600ml/min);
(6) The design of the reflux condenser according to the national food standard and the original drawing of "Chinese Pharmacopoeia"
(7) There is a built-in magnetic stirrer at the bottom of the receiving bottle, and the stirring speed can be monotonous in a single group;
(8) Can be used with our company's nitrogen generator.