CN103499597B - Based on the detection method of sodium formaldehyde sulfoxylate in the flour of toxic gas detection - Google Patents
Based on the detection method of sodium formaldehyde sulfoxylate in the flour of toxic gas detection Download PDFInfo
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Abstract
Field of food detection is belonged to based on the pick-up unit of sodium formaldehyde sulfoxylate in the flour of toxic gas detection and method, being specifically related to one utilizes sodium formaldehyde sulfoxylate to produce toxic gas at high operating temperatures, judges whether to contain in flour the apparatus and method of sodium formaldehyde sulfoxylate by detecting corresponding concentration of toxic gases; This device is provided with the pressure cooker that water can be heated to more than 130 DEG C, and is provided with and discharges the corresponding formaldehyde sensor of harmful gas with sodium formaldehyde sulfoxylate at 120 DEG C, hydrogen sulfide sensor and SO 2 sensor; The method is by between contrast flour aqueous solution 110 DEG C and 130 DEG C, and whether the change of concentration of toxic gases, judge in flour containing sodium formaldehyde sulfoxylate; Adopt apparatus of the present invention and method to detect in flour whether contain sodium formaldehyde sulfoxylate, not only can realize quick detection, and without any need for medicine, safety and environmental protection, reduces testing cost.
Description
Technical field
Field of food detection is belonged to based on the pick-up unit of sodium formaldehyde sulfoxylate in the flour of toxic gas detection and method, being specifically related to one utilizes sodium formaldehyde sulfoxylate to produce toxic gas at high operating temperatures, judges whether to contain in flour the apparatus and method of sodium formaldehyde sulfoxylate by detecting corresponding concentration of toxic gases.
Background technology
Sodium formaldehyde sulfoxylate is being commonly called as of sodium formaldehyde sulphoxylate, is usually used in industrial bleaching agent, reductive agent etc.It is the explicitly provided violated food additives of China.But, still have illegal retailer merely in order to economic interests, ignore state's laws, sodium formaldehyde sulfoxylate is added in food.Wherein, modal is add in flour by sodium formaldehyde sulfoxylate, makes it whiter.Because sodium formaldehyde sulfoxylate is a kind of strong carcinogen, to the lung of human body, the damage of kidney and liver is very big, therefore, is necessary whether detect containing sodium formaldehyde sulfoxylate in flour.
The patent of invention of the people such as Lu Xin application (application number: 200510037413.8) detector tube of sodium formaldehyde sulfoxylate (sodium bisulphite formaldehyde) " in the food ", discloses a kind of pick-up unit designed according to chemical detection principle.
(application number: 200510057262.2) " method for rapid detecting sodium sulfoxylate formaldehyde in foodstuff " discloses a kind of chemical detection method of sodium formaldehyde sulfoxylate to the patent of invention of people's applications such as Zhang Xiaofeng.
The shortcoming of chemical detection devices and method is to need, with chemical reagent, be therefore not easy to accomplish safety and environmental protection, and chemical reagent also can increase testing cost.
Summary of the invention
In order to solve the problem, the present invention devises a kind of pick-up unit based on sodium formaldehyde sulfoxylate in the flour of toxic gas detection and method, and this pick-up unit and method not only can realize quick detection, and without any need for medicine, safety and environmental protection, reduces testing cost.
The object of the present invention is achieved like this:
Based on the pick-up unit of sodium formaldehyde sulfoxylate in the flour of toxic gas detection, comprise pressure cooker, the air outlet valve be arranged on pressure cooker, gas admittance valve, described gas admittance valve connects air feeder; Be arranged on the pressure transducer of pressure cooker inside, temperature sensor, formaldehyde sensor, hydrogen sulfide sensor and SO 2 sensor; Be arranged on the heating arrangement bottom pressure cooker; Described air outlet valve, gas admittance valve, pressure transducer, temperature sensor, formaldehyde sensor, hydrogen sulfide sensor, SO 2 sensor is all connected computing machine with heating arrangement.
The above-mentioned pick-up unit based on sodium formaldehyde sulfoxylate in the flour of toxic gas detection, described heating arrangement is electric furnace or gas stove.
Based on the detection method of sodium formaldehyde sulfoxylate in the flour of toxic gas detection, comprise the following steps:
Step a, configuration plane amidin;
Be the ratio of 1:10 according to the volume ratio of flour and water, configuration plane amidin;
Step b, normal temperature state are gone down except toxic gas;
Heating arrangement is not utilized to heat pressure cooker, keep pressure cooker inside to be normal temperature, utilize formaldehyde sensor, hydrogen sulfide sensor and SO 2 sensor carry out harmful gas inspection to pressure cooker, if not containing formaldehyde, sulfuretted hydrogen and sulphuric dioxide, then this step terminates; If containing any one in formaldehyde, sulfuretted hydrogen and sulphuric dioxide, open air outlet valve and gas admittance valve simultaneously, air feeder by gas admittance valve to pressure cooker air supply, until pressure cooker not containing till formaldehyde, sulfuretted hydrogen and sulphuric dioxide;
Harmful gas concentration at step c, detection 110 DEG C;
Close air outlet valve and gas admittance valve, heating arrangement is utilized to heat pressure cooker, the water vapor of evaporation makes pressure cooker internal pressure increase, the boiling point of water increases, when temperature sensor monitors is 110 DEG C to pressure cooker internal temperature, utilize formaldehyde sensor, hydrogen sulfide sensor and SO 2 sensor carry out harmful gas inspection to pressure cooker, if testing result is simultaneously containing formaldehyde, sulfuretted hydrogen and sulphuric dioxide, illustrate in flour containing sodium formaldehyde sulfoxylate; If not containing formaldehyde, sulfuretted hydrogen and sulphuric dioxide, enter steps d;
Harmful gas concentration at steps d, detection 130 DEG C;
Heating arrangement is utilized to continue to heat pressure cooker, the water vapor of evaporation makes pressure cooker internal pressure continue to increase, the boiling point of water continues to increase, when temperature sensor monitors is 310 DEG C to pressure cooker internal temperature, utilize formaldehyde sensor, hydrogen sulfide sensor and SO 2 sensor carry out harmful gas inspection to pressure cooker, obtain the concentration of formaldehyde, sulfuretted hydrogen and sulphuric dioxide;
Step e, to judge in flour whether containing sodium formaldehyde sulfoxylate;
If the concentration of the formaldehyde that step e obtains, sulfuretted hydrogen and sulphuric dioxide all exceedes the concentration more than 2 times of formaldehyde, sulfuretted hydrogen and the sulphuric dioxide that steps d obtains, illustrate in flour containing sodium formaldehyde sulfoxylate.
The above-mentioned detection method based on sodium formaldehyde sulfoxylate in the flour of toxic gas detection, step e is:
If the concentration of the formaldehyde that step e obtains, sulfuretted hydrogen and sulphuric dioxide all exceedes the concentration more than 1.5 times of formaldehyde, sulfuretted hydrogen and the sulphuric dioxide that steps d obtains, illustrate in flour containing sodium formaldehyde sulfoxylate.
Because apparatus of the present invention are provided with the pressure cooker that water can be heated to more than 130 DEG C, and be provided with and discharge the corresponding formaldehyde sensor of harmful gas with sodium formaldehyde sulfoxylate at 120 DEG C, hydrogen sulfide sensor and SO 2 sensor; Method is by between contrast flour aqueous solution 110 DEG C and 130 DEG C, and whether the change of concentration of toxic gases, judge in flour containing sodium formaldehyde sulfoxylate; Adopt apparatus of the present invention and method to detect in flour whether contain sodium formaldehyde sulfoxylate, not only can realize quick detection, and without any need for medicine, safety and environmental protection, reduces testing cost.
Accompanying drawing explanation
Fig. 1 is the structure of the detecting device schematic diagram of sodium formaldehyde sulfoxylate in the flour that the present invention is based on toxic gas detection.
Fig. 2 is the detection method process flow diagram of sodium formaldehyde sulfoxylate in the flour that the present invention is based on toxic gas detection.
In figure: 1 pressure cooker, 2 air outlet valves, 3 gas admittance valves, 4 pressure transducers, 5 temperature sensors, 6 air feeders, 7 formaldehyde sensors, 8 hydrogen sulfide sensors, 9 SO 2 sensor, 10 heating arrangements, 11 computing machines.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the invention is described in further detail.
Specific embodiment one
The pick-up unit based on sodium formaldehyde sulfoxylate in the flour of toxic gas detection of the present embodiment, structural representation as shown in Figure 1.This device comprises pressure cooker 1, the air outlet valve 2 be arranged on pressure cooker 1, gas admittance valve 3, and described gas admittance valve 3 connects air feeder 6; Be arranged on the pressure transducer 4 of pressure cooker 1 inside, temperature sensor 5, formaldehyde sensor 7, hydrogen sulfide sensor 8 and SO 2 sensor 9; Be arranged on the heating arrangement 10 bottom pressure cooker 1; Described air outlet valve 2, gas admittance valve 3, pressure transducer 4, temperature sensor 5, formaldehyde sensor 7, hydrogen sulfide sensor 8, SO 2 sensor 9 is all connected computing machine 11 with heating arrangement 10.
The above-mentioned pick-up unit based on sodium formaldehyde sulfoxylate in the flour of toxic gas detection, described heating arrangement 10 is electric furnace or gas stove.
The detection method based on sodium formaldehyde sulfoxylate in the flour of toxic gas detection of the present embodiment, process flow diagram as shown in Figure 2.The method comprises the following steps:
Step a, configuration plane amidin;
Be the ratio of 1:10 according to the volume ratio of flour and water, configuration plane amidin;
Step b, normal temperature state are gone down except toxic gas;
Heating arrangement 10 pairs of pressure cookers 1 are not utilized to heat, keep pressure cooker 1 inside to be normal temperature, utilize formaldehyde sensor 7, hydrogen sulfide sensor 8 and SO 2 sensor 9 pairs of pressure cookers 1 carry out harmful gas inspection, if not containing formaldehyde, sulfuretted hydrogen and sulphuric dioxide, then this step terminates; If containing any one in formaldehyde, sulfuretted hydrogen and sulphuric dioxide, open air outlet valve 2 and gas admittance valve 3, air feeder 6 passes through gas admittance valve 3 to pressure cooker 1 air supply simultaneously, until pressure cooker 1 not containing till formaldehyde, sulfuretted hydrogen and sulphuric dioxide;
Harmful gas concentration at step c, detection 110 DEG C;
Close air outlet valve 2 and gas admittance valve 3, heating arrangement 10 pairs of pressure cookers 1 are utilized to heat, the water vapor of evaporation makes pressure cooker 1 internal pressure increase, the boiling point of water increases, when to monitor pressure cooker 1 internal temperature be 110 DEG C to temperature sensor 5, utilize formaldehyde sensor 7, hydrogen sulfide sensor 8 and SO 2 sensor 9 pairs of pressure cookers 1 carry out harmful gas inspection, if testing result is simultaneously containing formaldehyde, sulfuretted hydrogen and sulphuric dioxide, illustrate in flour containing sodium formaldehyde sulfoxylate; If not containing formaldehyde, sulfuretted hydrogen and sulphuric dioxide, enter steps d;
Harmful gas concentration at steps d, detection 130 DEG C;
Heating arrangement 10 is utilized to continue to heat pressure cooker 1, the water vapor of evaporation makes pressure cooker 1 internal pressure continue to increase, the boiling point of water continues to increase, when to monitor pressure cooker 1 internal temperature be 310 DEG C to temperature sensor 5, utilize formaldehyde sensor 7, hydrogen sulfide sensor 8 and SO 2 sensor 9 pairs of pressure cookers 1 carry out harmful gas inspection, obtain the concentration of formaldehyde, sulfuretted hydrogen and sulphuric dioxide;
Step e, to judge in flour whether containing sodium formaldehyde sulfoxylate;
If the concentration of the formaldehyde that step e obtains, sulfuretted hydrogen and sulphuric dioxide all exceedes the concentration more than 2 times of formaldehyde, sulfuretted hydrogen and the sulphuric dioxide that steps d obtains, illustrate in flour containing sodium formaldehyde sulfoxylate.
The above-mentioned detection method based on sodium formaldehyde sulfoxylate in the flour of toxic gas detection, step e can also be chosen as: if the concentration of formaldehyde, sulfuretted hydrogen and sulphuric dioxide that step e obtains all exceedes the concentration more than 1.5 times of formaldehyde, sulfuretted hydrogen and the sulphuric dioxide that steps d obtains, and illustrates in flour containing sodium formaldehyde sulfoxylate.
Specific embodiment two
The present embodiment is the embodiment of the method whether certain brand flour of detection contains sodium formaldehyde sulfoxylate.
The detection method based on sodium formaldehyde sulfoxylate in the flour of toxic gas detection of the present embodiment, comprises the following steps:
Step a, configuration plane amidin;
Be the ratio of 1:10 according to the volume ratio of flour and water, configuration plane amidin;
Step b, normal temperature state are gone down except toxic gas;
Heating arrangement 10 pairs of pressure cookers 1 are not utilized to heat, keep pressure cooker 1 inside to be normal temperature, utilize formaldehyde sensor 7, hydrogen sulfide sensor 8 and SO 2 sensor 9 pairs of pressure cookers 1 carry out harmful gas inspection, if not containing formaldehyde, sulfuretted hydrogen and sulphuric dioxide, then this step terminates; If containing any one in formaldehyde, sulfuretted hydrogen and sulphuric dioxide, open air outlet valve 2 and gas admittance valve 3, air feeder 6 passes through gas admittance valve 3 to pressure cooker 1 air supply simultaneously, until pressure cooker 1 not containing till formaldehyde, sulfuretted hydrogen and sulphuric dioxide;
Harmful gas concentration at step c, detection 110 DEG C;
Close air outlet valve 2 and gas admittance valve 3, heating arrangement 10 pairs of pressure cookers 1 are utilized to heat, the water vapor of evaporation makes pressure cooker 1 internal pressure increase, the boiling point of water increases, when to monitor pressure cooker 1 internal temperature be 110 DEG C to temperature sensor 5, utilize formaldehyde sensor 7, hydrogen sulfide sensor 8 and SO 2 sensor 9 pairs of pressure cookers 1 carry out harmful gas inspection, and testing result is not containing formaldehyde, sulfuretted hydrogen and sulphuric dioxide;
Harmful gas concentration at steps d, detection 130 DEG C;
Heating arrangement 10 is utilized to continue to heat pressure cooker 1, the water vapor of evaporation makes pressure cooker 1 internal pressure continue to increase, the boiling point of water continues to increase, when to monitor pressure cooker 1 internal temperature be 310 DEG C to temperature sensor 5, utilize formaldehyde sensor 7, hydrogen sulfide sensor 8 and SO 2 sensor 9 pairs of pressure cookers 1 carry out harmful gas inspection, obtain the concentration of formaldehyde, sulfuretted hydrogen and sulphuric dioxide;
Step e, to judge in flour whether containing sodium formaldehyde sulfoxylate;
If the concentration of the formaldehyde that the concentration of the formaldehyde that step e obtains, sulfuretted hydrogen and sulphuric dioxide and steps d obtain, sulfuretted hydrogen and sulphuric dioxide is 0, illustrate in flour not containing sodium formaldehyde sulfoxylate.
Specific embodiment three
The present embodiment is determining specific embodiment two flour used not containing on the basis of sodium formaldehyde sulfoxylate, carrying out the embodiment of the method detected in flour after adding sodium formaldehyde sulfoxylate.
The detection method based on sodium formaldehyde sulfoxylate in the flour of toxic gas detection of the present embodiment, comprises the following steps:
Step a, configuration plane amidin;
Be the ratio of 1:10 according to the volume ratio of flour and water, configuration plane amidin;
Step b, normal temperature state are gone down except toxic gas;
Heating arrangement 10 pairs of pressure cookers 1 are not utilized to heat, keep pressure cooker 1 inside to be normal temperature, utilize formaldehyde sensor 7, hydrogen sulfide sensor 8 and SO 2 sensor 9 pairs of pressure cookers 1 carry out harmful gas inspection, if not containing formaldehyde, sulfuretted hydrogen and sulphuric dioxide, then this step terminates; If containing any one in formaldehyde, sulfuretted hydrogen and sulphuric dioxide, open air outlet valve 2 and gas admittance valve 3, air feeder 6 passes through gas admittance valve 3 to pressure cooker 1 air supply simultaneously, until pressure cooker 1 not containing till formaldehyde, sulfuretted hydrogen and sulphuric dioxide;
Harmful gas concentration at step c, detection 110 DEG C;
Close air outlet valve 2 and gas admittance valve 3, heating arrangement 10 pairs of pressure cookers 1 are utilized to heat, the water vapor of evaporation makes pressure cooker 1 internal pressure increase, the boiling point of water increases, when to monitor pressure cooker 1 internal temperature be 110 DEG C to temperature sensor 5, utilize formaldehyde sensor 7, hydrogen sulfide sensor 8 and SO 2 sensor 9 pairs of pressure cookers 1 carry out harmful gas inspection, testing result contains formaldehyde, sulfuretted hydrogen and sulphuric dioxide, illustrates in flour very possible containing sodium formaldehyde sulfoxylate;
Harmful gas concentration at steps d, detection 130 DEG C;
Heating arrangement 10 is utilized to continue to heat pressure cooker 1, the water vapor of evaporation makes pressure cooker 1 internal pressure continue to increase, the boiling point of water continues to increase, when to monitor pressure cooker 1 internal temperature be 310 DEG C to temperature sensor 5, utilize formaldehyde sensor 7, hydrogen sulfide sensor 8 and SO 2 sensor 9 pairs of pressure cookers 1 carry out harmful gas inspection, obtain the concentration of formaldehyde, sulfuretted hydrogen and sulphuric dioxide;
Step e, to judge in flour whether containing sodium formaldehyde sulfoxylate;
If the concentration that the concentration of the formaldehyde that step e obtains, sulfuretted hydrogen and sulphuric dioxide all exceedes formaldehyde, sulfuretted hydrogen and the sulphuric dioxide that steps d obtains is respectively 17 times, 19 times and 20 times, illustrate in flour and determine containing sodium formaldehyde sulfoxylate, and this testing result and actually to match, demonstrate the correctness of the inventive method.
The present invention is not limited to above-mentioned preferred forms, and anyone should learn the structure change or method improvement made under enlightenment of the present invention, and every have identical or close technical scheme with the present invention, all falls within protection scope of the present invention.
Claims (1)
1., based on the detection method of sodium formaldehyde sulfoxylate in the flour of toxic gas detection, it is characterized in that: comprise the following steps:
Step a, configuration plane amidin;
Be the ratio of 1:10 according to the volume ratio of flour and water, configuration plane amidin;
Step b, normal temperature state are gone down except toxic gas;
Heating arrangement (10) is not utilized to heat pressure cooker (1), pressure cooker (1) inside is kept to be normal temperature, utilize formaldehyde sensor (7), hydrogen sulfide sensor (8) and SO 2 sensor (9) carry out harmful gas inspection to pressure cooker (1), if not containing formaldehyde, sulfuretted hydrogen and sulphuric dioxide, then this step terminates; If containing any one in formaldehyde, sulfuretted hydrogen and sulphuric dioxide, open air outlet valve (2) and gas admittance valve (3) simultaneously, air feeder (6) by gas admittance valve (3) to pressure cooker (1) air supply, until pressure cooker (1) not containing till formaldehyde, sulfuretted hydrogen and sulphuric dioxide;
Harmful gas concentration at step c, detection 110 DEG C;
Close air outlet valve (2) and gas admittance valve (3), heating arrangement (10) is utilized to heat pressure cooker (1), the water vapor of evaporation makes pressure cooker (1) internal pressure increase, the boiling point of water increases, when to monitor pressure cooker (1) internal temperature be 110 DEG C to temperature sensor (5), utilize formaldehyde sensor (7), hydrogen sulfide sensor (8) and SO 2 sensor (9) carry out harmful gas inspection to pressure cooker (1), if testing result is simultaneously containing formaldehyde, sulfuretted hydrogen and sulphuric dioxide, illustrate in flour containing sodium formaldehyde sulfoxylate; If not containing formaldehyde, sulfuretted hydrogen and sulphuric dioxide, enter steps d;
Harmful gas concentration at steps d, detection 130 DEG C;
Heating arrangement (10) is utilized to continue to heat pressure cooker (1), the water vapor of evaporation makes pressure cooker (1) internal pressure continue to increase, the boiling point of water continues to increase, when to monitor pressure cooker (1) internal temperature be 130 DEG C to temperature sensor (5), utilize formaldehyde sensor (7), hydrogen sulfide sensor (8) and SO 2 sensor (9) carry out harmful gas inspection to pressure cooker (1), obtain the concentration of formaldehyde, sulfuretted hydrogen and sulphuric dioxide;
Step e, to judge in flour whether containing sodium formaldehyde sulfoxylate;
If the concentration of the formaldehyde that steps d obtains, sulfuretted hydrogen and sulphuric dioxide all exceedes the concentration more than 1.5 times of formaldehyde, sulfuretted hydrogen and the sulphuric dioxide that step c obtains, illustrate in flour containing sodium formaldehyde sulfoxylate.
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| CN116773758B (en) * | 2023-08-17 | 2023-11-03 | 山东省食品药品检验研究院 | Detection equipment for white cake in flour and application method of detection equipment |
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