[New National Standard Special] ST109B1 Intelligent Food 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

The new national standard for sulfur dioxide in food (determination of sulfur dioxide in traditional Chinese medicine according to the Chinese Pharmacopoeia method) is supported by dedicated instruments: ST109A, ST109B1, ST109C, and ST109D series are all equipped with automatic reagent addition and automatic nitrogen blowing control functions (a first in China)!!!


Research and Development Background:


With the promulgation of the new national standard GB5009.34-2022 "Determination of Sulfur Dioxide in Food" , the detection methods for sulfur dioxide in food and Chinese medicinal materials in the Chinese Pharmacopoeia are now largely the same. Based on the new national standard and pharmacopoeia methods, Jinan Shengteng Technology has developed four dedicated testing instruments: ST109A, ST109B1, ST109C, and ST109D .


Features:

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

* Cooling method: The main unit has an integrated compressor design that automatically completes the internal circulation of cooling water, eliminating the need for an external chiller;

* Condenser design: National standard dedicated reflux condenser;

* Control system: Automatic heating technology, with selectable simmering and full-boiling heating modes; automatic timer from 0-999 minutes;

* Reagent addition: Reagents can be added automatically via a high-precision reagent dispensing pump, eliminating the need for manual operation;

* Nitrogen control: controlled by a rotor flow meter, range: 200-2000 ml/min;


Comparison of New and Old National Standard Testing Methods for Determining Sulfur Dioxide in Food (First Method)

GB5009.34-2016 GB5009.34-2022 (New National Standard)
Testing MethodsTitration MethodTitration Method Changed to: Acid-Base Titration Method, Added Second Method Spectrophotometry and Third Method Ion Chromatography.
Detection RangeThis standard specifies the method for determining total sulfur dioxide in foods such as fruits, dried vegetables, rice flour, noodles, granulated sugar, edible fungi, and grape wine.The first method is the acid-base titration method, suitable for the determination of sulfur dioxide in food;
The second method is the spectrophotometry, direct extraction method applicable to white sugar and sugar products, starch and starch products, fresh wet noodle products, etc., for samples without oil and fat and colorless interference in the extraction solution, while nitrogen steam distillation extraction method is suitable for colored samples such as grape wine and brown sugar for the determination of sulfur dioxide;
The third method is the ion chromatography method, suitable for the determination of sulfur dioxide in food.
Sample Preparation5g homogeneous sample (accurate to 0.001g, sampling amount can be adjusted based on content level), liquid samples can directly absorb 5.00mL~10.00mL sample; add water to 250ml; add 10ml of hydrochloric acid.Take 20 g~100 g of solid or semi-solid sample (accurate to 0.01 g, sampling amount can be adjusted based on content level); take 20 mL (g)~200 mL (g) of liquid sample; add water to 20-500ml; add 10ml of 6mol/L hydrochloric acid.
Whether to Perform Nitrogen DistillationNoNitrogen Distillation, Flow Rate: 1.0-2.0L/min
Absorption Solution25mL Lead Acetate Absorption Solution50mL of 3% Hydrogen Peroxide Solution (First Method)
Distillation MethodCollect 200ml of distillate, then distill for 1 minute, rinse the device inserted into the absorption solution with a small amount of distilled water.Heat the solution in the flask to boiling and maintain a gentle boil for 1.5h.
Titration MethodAdd 10mL of hydrochloric acid and 1mL of starch indicator solution to the receiving flask in sequence, shake well, then titrate with iodine standard solution until the solution turns blue and remains unchanged for 30s. Perform a blank test simultaneously.Cool the absorption solution and shake well, add 3 drops of 2.5 mg/mL methyl red ethanol indicator solution to the absorption solution, titrate with sodium hydroxide standard solution (0.01 mol/L) until the solution turns yellow and remains unchanged for 20 seconds, and perform a blank test simultaneously.
Detection Limit and Quantification LimitWhen taking 5g of solid sample, the method's detection limit (LOD) is 3.0mg/kg, and the quantification limit is 10.0mg/kg; when taking 10mL of liquid sample, the method's detection limit (LOD) is 1.5mg/L, and the quantification limit is 5.0mg/L.When using 0.01mol/L sodium hydroxide titration solution, for solid or semi-solid samples weighing 35g, the detection limit is 1mg/kg, and the quantification limit is 10mg/kg; for liquid samples taking 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 Pre-treatment), ST106K2 (Fully Automatic, Can Directly Output Test Results.)ST109 Full Series (A is six-position, fully automatic model, directly outputs test results; B is six-position; C is eight-position, high cost-performance model; D is ion chromatography method, dedicated to water vapor distillation), all models are equipped with automatic acid addition and nitrogen control devices (A uses digital imported nitrogen controller, other models use rotor flow meters). The full series is compatible with testing sulfur dioxide in traditional Chinese medicine and herbal materials.


◉ Specifications

Jinan Shengtai Technology ST109 Series Intelligent Sulfur Dioxide Tester Product Parameter Comparison Table
ModelST109AST109BST109CST109D
Based on StandardsGB5009.34-2022 'Method for Determination of Sulfur Dioxide in Food', 2015 Edition and 2020 Edition 'Chinese Pharmacopoeia' methods for testing sulfur dioxide in traditional Chinese medicine and herbal materials;
Corresponding StandardsGB5009.34-2022 First Method, Second MethodGB5009.34-2022 First Method, Second MethodGB5009.34-2022 First Method, Second MethodGB5009.34-2022 Third Method
Product PositioningHigh-end, Fully AutomaticStandard EditionCost-performance ModelDedicated Machine for Water Vapor Distillation
Number of Samples6686
Flask CapacityConventional Double-neck 1000ml FlaskCustom Double-neck 1000ml FlaskConventional Double-neck 1000ml FlaskConventional Double-neck 500ml Flask
Heating MethodFar-infrared Ceramic HeatingFar-infrared Ceramic HeatingFar-infrared Ceramic HeatingBuilt-in Steam Source Water Vapor Heating
Condenser StructureReflux, Semi-hidden StructureReflux CondenserReflux, Semi-hidden StructureSnake-shaped Condenser
Automatic Acid AdditionAutomatic Acid AdditionAutomatic Acid AdditionAutomatic Acid AdditionAutomatic Acid Addition
Nitrogen ControlDigitally Adjustable Nitrogen Average Distribution SystemRotor Flow Meter (200-2000ml/min)Rotor Flow Meter (200-2000ml/min)Rotor Flow Meter (200-2000ml/min)
Cooling MethodExternal Circulating Water Cooling MachineBuilt-in Compressor Self-circulating Cooling SystemExternal Circulating Water Cooling MachineExternal Circulating Water Cooling Machine
Control MethodDesktop ComputerLCD Touch ScreenLCD Touch ScreenLCD Touch Screen
Automatic TitrationHigh-precision Injection Pump Automatic TitrationNoneNone——
Endpoint RecognitionHigh-precision Visual Sensor, Fully Simulating Human Eye, Automatically Recognizes Titration EndpointNoneNoneNone
Rated Power3500W3600W4500W3000W
External Dimensions (mm)735×650×670960×575×410940×650×680960×500×730


◉ Success Stories

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