[Special for the new national standard] ST109A automatic food and drug sulfur dioxide analyzer

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  • New national standard food sulfur dioxide ("Chinese Pharmacopoeia" method to detect sulfur dioxide in traditional Chinese medicine) supporting special instruments: ST109AST109BBST109CST109D are equipped with automatic reagent addition and automatic nitrogen blowing control functions (the first in the country)! ! !

    R & D background:

    With the promulgation of the new national standard GB5009.34-2022 "Determination of Sulfur Dioxide in Food" , the determination and detection methods of sulfur dioxide in food and Chinese herbal medicines in "Chinese Pharmacopoeia" are roughly the same. According to the new national standard and pharmacopoeia methods, Jinan Shengtai Technology has developed four special testing instruments : ST109A, ST109B, ST109C, and ST109D . Among them, ST109A is the first special instrument for automatic detection in China.

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


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

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

    * Condenser tube design: semi-hidden non-clamp national standard special reflux condenser tube;

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

    * Reagent addition: The addition of reagents can be completed automatically through the high-precision reagent filling pump without manual operation;

    * Nitrogen control: high-quality nitrogen uniform distribution system, automatic adjustment of nitrogen flow, non-ordinary rotameter;

    * Titration system: automatic titration with sodium hydroxide standard solution;

    * End point identification: Automatically identify the titration end point and automatically calculate the detection result.

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

    GB5009.34-2016 GB5009.34-2022 (new national standard)
    Detection methodtitrationThe titration method is changed to: acid-base titration method, and the second method spectrophotometry and the third method ion chromatography are added.
    examination rangeThis standard specifies the determination method of total sulfur dioxide in foods such as preserved fruits, dried vegetables, rice noodles, vermicelli, granulated sugar, edible fungi and wine.The first method is the acid-base titration method, which is suitable for the determination of sulfur dioxide in food;
    The second method is the spectrophotometric method. The direct extraction method is suitable for the determination of sulfur dioxide in samples such as white sugar and white sugar products, starch and starch products, raw wet noodle products, etc. 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 homogeneous sample (accurate to 0.001g, the sampling volume depends on the level of content), liquid samples can be directly absorbed 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 depends on the content); take 20 mL (g) to 200 mL (g) of liquid sample; add 20-500 ml of water; Add 10ml of 6mol/L hydrochloric acid.
    Whether to nitrogen distillationnoNitrogen-filled distillation, flow rate: 1.0-2.0L/min
    Absorbent25mL lead acetate absorption solution3% hydrogen peroxide solution 50mL (first method)
    Distillation methodCollect 200ml of distillate, distill for 1 minute, and rinse the device inserted into the absorption solution with a small amount of distilled water.The solution in the flask was heated to boiling and kept boiling slightly for 1.5h.
    Titration methodAdd 10mL of hydrochloric acid and 1mL of starch indicator solution to the removed iodine bottle in turn, shake well and titrate with iodine standard solution until the color of the solution turns blue and does not fade within 30s. At the same time do a blank test.Let the absorption liquid cool and shake well, add 3 drops of 2.5 mg/mL methyl red ethanol solution indicator to the absorption liquid, titrate with sodium hydroxide standard solution (0.01 mol/L) until the yellow color does not fade in 20 seconds, and Simultaneously conduct a blank test.
    Limit of detection and limit of quantitationWhen taking 5g solid sample, the detection limit (LOD) of the method is 3.0mg/kg, the limit of quantification is 10.0mg/kg; when taking 10mL liquid sample, the detection limit (LOD) of the method is 1.5mg/L, The limit of quantification is 5.0mg/L.When using 0.01mol/L sodium hydroxide titration solution, when the solid or semi-fluid sample volume 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 The output limit is 1 mg/L (mg/kg), and the limit of quantification is 6 mg/L (mg/kg).
    Product recommended modelST106-1RW (distillation pretreatment), ST106K2 (automatic, can directly output the test results.)The whole series of ST109 (A is a six-digit, automatic model, which can directly output the test result; B is a six-digit; C is an eight-digit, cost-effective model; D is a special machine for ion chromatography and steam distillation), and the whole series is equipped with automatic heating as standard. Acid and nitrogen control device (A adopts digital imported nitrogen controller, other models use rotameter). The whole series is compatible with the detection of sulfur dioxide in Chinese medicine and Chinese medicinal materials.

  • Jinan Shengtai Technology ST109 Series Intelligent Sulfur Dioxide Meter Product Parameter Comparison Table
    According to the standardGB5009.34-2022 "Determination of Sulfur Dioxide in Food", 2015 Edition, 2020 Edition "Chinese Pharmacopoeia" Determination of Sulfur Dioxide in Chinese Medicines and Chinese Medicinal Materials;
    corresponding standardGB5009.34-2022 first method, second methodGB5009.34-2022 first method, second methodGB5009.34-2022 first method, second methodThe third method of GB5009.34-2022
    Product Positioninghigh-end, fully automaticStandard EditionValue for moneySteam Distillation Machine
    Number of samples6686
    Flask volumeConventional 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 steam heating
    Condenser structureBackflow, semi-hidden structureReflux condenserBackflow, semi-hidden structureSerpentine condenser
    Automatic acid additionAutomatic acid additionAutomatic acid additionAutomatic acid additionAutomatic acid addition
    nitrogen controlDigital adjustable nitrogen average distribution systemRotameter (200-2000ml/min)Rotameter (200-2000ml/min)Rotameter (200-2000ml/min)
    cooling methodExternal cooling water circulation machineBuilt-in compressor self-circulation cooling systemExternal cooling water circulation machineExternal cooling water circulation machine
    control methodDesktop PCLCD touch screenLCD touch screenLCD touch screen
    automatic titrationHigh-precision syringe pump automatic titrationnonenone——
    endpoint identificationHigh-precision visual sensor, fully simulates the human eye, and automatically recognizes the titration end pointnonenonenone
    rated power3500W3600W4500W3000W
    Dimensions (mm)735×650×670960×575×410940×650×680960×500×730

  • 盛泰ST109系列仪器业绩表_00.jpg









keywords: the new laboratory analytical instruments, intelligent pre-processing equipment