ST109A Fully Automatic Food and Chinese Medicine Sulfur Dioxide Tester

Supported by technological innovation and quality management, with the concept of developing domestically-original instruments and equipment, and adhering to the principle of putting ourselves first, we have developed and manufactured a series of intelligent laboratory instruments and equipment, online atmospheric monitoring equipment, etc. with leading performance and reliable quality.

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◉ Product Introduction

Special instruments for the new national standard food sulfur dioxide (Chinese Pharmacopoeia method for testing sulfur dioxide in traditional Chinese medicine): ST109AST109BBST109CST109D are equipped with automatic reagent addition and automatic nitrogen blowing control functions (the first in China)!!!


R&D Background:


With the promulgation of the new national standard GB5009.34-2022 "Determination of sulfur dioxide in food" , the determination methods of sulfur dioxide in food and sulfur dioxide in traditional Chinese medicine in the "Chinese Pharmacopoeia" are roughly the same. Jinan Shengtai Technology has developed four special testing instruments, ST109A, ST109B, ST109C, and ST109D, based on the new national standard and pharmacopoeia methods. Among them, ST109A is the first fully automatic detection instrument in China.

It fully complies with the new national standard for food sulfur dioxide and the methods of the 2016 and 2020 editions of the "Chinese Pharmacopoeia".


Features:

* Heating method: automatic far-infrared ceramic heating management system, automatic anti-dry burning technology;

* Cooling method: compressor cooling cycle cooling, fast cooling speed;

* Condenser design: semi-hidden fixture-free national standard special reflux condenser;

* Control system: automatic heating technology, can set micro-boiling and full-boiling heating modes; automatic timing 0-999min;

* Reagent addition: Reagent addition can be completed automatically through a high-precision reagent filling pump without manual operation;

* Nitrogen control: high-quality nitrogen average distribution system, automatic adjustment of nitrogen flow, non-ordinary rotor flowmeter;

* Titration system: Automatically titrate with sodium hydroxide standard solution;

* End point recognition: Automatically recognize the titration endpoint and automatically calculate the test results.


Comparison of the new and old national standard test methods for the determination of sulfur dioxide in food (method 1)


GB5009.34-2016GB5009.34-2022 (new national standard)
Detection MethodsTitrationThe titration method was changed to acid-base titration method, and the second method spectrophotometry and the third method ion chromatography were added.
Detection rangeThis standard specifies the determination method for total sulfur dioxide in foods such as preserved fruits, dried vegetables, rice noodles, vermicelli, sugar, edible fungi and wine.The first method is acid-base titration, which is applicable to the determination of sulfur dioxide in food;
The second method is spectrophotometry. The direct extraction method is applicable to the determination of sulfur dioxide in samples without oil and fat, such as white sugar and white sugar products, starch and starch products, and raw wet noodle products, and the extract has no color interference. The nitrogen-filled distillation extraction method is applicable to the determination of sulfur dioxide in colored samples such as wine and brown sugar.
The third method is ion chromatography, which is suitable for the determination of sulfur dioxide in food.
Sample preparation5g uniform sample (accurate to 0.001g, the sampling amount can be determined according to the content), liquid sample can directly absorb 5.00mL~10.00mL sample; add 250ml of water; add 10ml of hydrochloric acid.Take 20 g to 100 g of solid or semi-fluid sample (accurate to 0.01 g, the sampling amount can be determined according to the content); take 20 mL (g) to 200 mL (g) of liquid sample; add 20-500 ml of water; add 10 ml of 6 mol/L hydrochloric acid.
Whether to distill with nitrogennoNitrogen distillation, flow rate: 1.0-2.0L/min
Absorption liquid25mL lead acetate absorption solution3% hydrogen peroxide solution 50mL (method 1)
Distillation methodCollect 200 ml of distillate, distill for another minute, and rinse the device inserted into the absorption liquid with a small amount of distilled water.Heat the solution in the flask to boiling and keep it at a slight boil for 1.5 hours.
Titration methodAdd 10 mL of hydrochloric acid and 1 mL of starch indicator solution to the removed iodine volumetric flask, shake well, and titrate with iodine standard solution until the solution turns blue and does not fade within 30 seconds. Perform a blank test at the same time.Cool the absorption liquid and shake it evenly. Add 3 drops of 2.5 mg/mL methyl red ethanol solution as indicator to the absorption liquid. Titrate with sodium hydroxide standard solution (0.01 mol/L) until it turns yellow and does not fade within 20 seconds. Perform a blank test at the same time.
Limit of Detection and Limit of QuantitationWhen taking 5g solid sample, the detection limit (LOD) of the method is 3.0mg/kg, and the quantification limit is 10.0mg/kg; when taking 10mL liquid sample, the detection limit (LOD) of the method is 1.5mg/L, and the quantification limit is 5.0mg/L.When using 0.01mol/L sodium hydroxide titration solution, when the solid or semi-fluid sample weight is 35g, the detection limit is 1mg/kg and the quantification limit is 10mg/kg; when the liquid sampling volume is 50mL (g), the detection limit is 1mg/L (mg/kg) and the quantification limit is 6 mg/L (mg/kg).
Recommended product modelsST106-1RW (distillation pretreatment), ST106K2 (fully automatic, can directly output test results.)The entire ST109 series (A is a six-digit, fully automatic model that directly outputs test results; B is a six-digit; C is an eight-digit, cost-effective model; D is a special machine for ion chromatography steam distillation) is equipped with automatic acid addition and nitrogen control devices as standard (A uses a digital imported nitrogen controller, and other models use rotor flow meters). The entire series is compatible with the detection of sulfur dioxide in traditional Chinese medicine and Chinese medicinal materials.


◉ Specifications


Jinan Shengtai Technology ST109 Series Intelligent Sulfur Dioxide Analyzer Product Parameter Comparison Table
modelST109AST109BST109CST109D
According to the standardGB5009.34-2022 "Determination of sulfur dioxide in food", 2015 edition, 2020 edition "Chinese Pharmacopoeia" determination of sulfur dioxide in traditional Chinese medicine and Chinese medicinal materials;
Corresponding standardsGB5009.34-2022 Method 1 and Method 2GB5009.34-2022 Method 1 and Method 2GB5009.34-2022 Method 1 and Method 2GB5009.34-2022 Third Law
Product PositioningHigh-end, fully automaticStandard versionCost-effective modelSteam distillation machine
Sample quantity6686
Flask capacityConventional double-mouth 1000ml flaskDouble mouth 1000ml custom flaskConventional double-mouth 1000ml flaskConventional double-mouth 500ml flask
Heating methodFar infrared ceramic heatingFar infrared ceramic heatingFar infrared ceramic heatingBuilt-in steam source water vapor heating
Condenser tube structureBackflow, semi-hidden structureReflux condenserBackflow, semi-hidden structureSerpentine condenser
Automatic acid additionAutomatic acid additionAutomatic acid additionAutomatic acid additionAutomatic acid addition
Nitrogen controlDigitally adjustable nitrogen even distribution systemRotor flow meter (200-2000ml/min)Rotor flow meter (200-2000ml/min)Rotor flow meter (200-2000ml/min)
Cooling methodExternal cooling water circulation machineBuilt-in compressor self-circulating cooling systemExternal cooling water circulation machineExternal cooling water circulation machine
Control methoddesktop computerLCD touch screenLCD touch screenLCD touch screen
Automatic titrationHigh-precision syringe pump for automatic titrationnonenone——
End point identificationHigh-precision visual sensor, fully simulating the human eye, automatically identifies the titration endpointnonenonenone
Rated Power3500W3600W4500W3000W
Dimensions (mm)

775×690×765

960×575×410940×650×680960×500×730


◉ Success Stories

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