CN110118677A - The detection method of Cr VI in a kind of pair of leather trunk - Google Patents
The detection method of Cr VI in a kind of pair of leather trunk Download PDFInfo
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- CN110118677A CN110118677A CN201810109201.3A CN201810109201A CN110118677A CN 110118677 A CN110118677 A CN 110118677A CN 201810109201 A CN201810109201 A CN 201810109201A CN 110118677 A CN110118677 A CN 110118677A
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- cabinet
- leather trunk
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/44—Sample treatment involving radiation, e.g. heat
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
The present invention relates to the detection methods of Cr VI in a kind of pair of leather trunk.This method comprises the following steps: the leather sample in leather trunk being placed in aging in a cabinet, the intracorporal temperature of regulating box is 40 DEG C~80 DEG C, and air humidity is 10%~20%, and ageing time is for 24 hours~72h;The good sample of aging is put into the content that Cr VI is detected in Cr VI detection device.The present invention carries out aging by the way that sample to be first placed in cabinet, simulate ageing environment leather trunk being placed in container, sample is subjected to aging, then the Cr VI in sample is detected again, improve the accuracy of content of 6-valence Cr ions detection when leather trunk reaches, the Cr VI for avoiding sample before appearing in factory is up to standard, and the problem that the Cr VI after dispatching from the factory in sample is not up to standard.
Description
Technical field
The present invention relates to a kind of detection method of Cr VI, in particular to the detection method of Cr VI in a kind of pair of leather trunk.
Background technique
Cr VI is carcinogen, it endangers people's health there are serious, thus the U.S. and some European Union member countries
It is made that specific regulation, general resultant Leather Cr (VI) content is in 5mg/kg hereinafter, the highest of Cr (VI) limits in glove leather
Amount is set to 2mg/kg.Chromium in leather trunk is to adopt in the Chrome Tanning Process of leather trunk in leather trunk process using caused by chrome tanning agent
Trivalent chromium, and in leather trunk organic matter (generally having reproducibility) content it is very high, and pH value is low, therefore such
Under the conditions of, it is theoretically to be difficult to have existing for Cr VI in leather trunk.But during atual detection, it usually will detect that sexavalence
The presence of chromium, in leather trunk the generation of Cr VI mainly by the following aspects the reason of it is caused: (1) used reduction not thorough
The chromium powder at bottom;(2) chromate pigment has been used;(3) other greases in use and leather trunk containing unsaturated bond fatting agent;
(4) in leather making process bath foam high pH value;(5) ultraviolet light irradiates;(6) heating or the influence of high temperature;(7) air when leather trunk stores
The influence of relative humidity etc..First four factor is to generate in leather trunk production process, and three factors are in skin below
It is generated in the transport of case, storage and use process.
China is leather trunk big producer, and many leather trunks will be placed in container to be arrived by marine, land or air transport
Domestic and international various regions, transport take a long time, and container is a closed space, it will usually because sunlight is exposed to the sun, and make packaging
Temperature in case than cabinet outside temperature it is much higher, simultaneously because the breeding of microorganism can make the intracorporal humidity of case in container
Want low compared to the humidity before vanning.And the higher trivalent chromium of temperature is more easily oxidized to Cr VI, the reduction of humidity, and reduce
Organic matter in leather trunk is by hexavalent chrome reduction at the ability of trivalent chromium.So Cr VI of the leather trunk when reaching farther away destination
The content of 6-valence Cr ions that content compares before factory vanning wants high, usually problem that may arise is that, the Cr VI detected before factory
Content does not have exceeded leather trunk but to occur the exceeded problem of chromium content after factory.So directly detecting leather trunk before leather trunk factory
In content of 6-valence Cr ions be inaccurate.
Summary of the invention
The object of the invention is to of the existing technology in order to solve the problems, such as, propose in a kind of a kind of pair of new leather trunk
The detection method of Cr VI.
The specific technical solution of the present invention is as follows:
The present invention provides the detection method of Cr VI in a kind of pair of leather trunk, which is characterized in that this method comprises the following steps:
Sample in leather trunk is placed in aging in a cabinet, the intracorporal temperature of regulating box is 40 DEG C~80 DEG C, and air humidity is
10%~20%, ageing time is for 24 hours~72h;
The good sample of aging is put into the content that Cr VI is detected in Cr VI detection device.
This method further comprises following steps:
The intracorporal oxygen concentration of regulating box is that 18%~21% pair of sample carries out aging.
This method further comprises following steps:
It is stepped up the intracorporal temperature of case, is gradually increased to constant maximum temperature by room temperature, maximum temperature range is 40 DEG C~
80℃。
This method further comprises following steps: gradually reduce cabinet in oxygen concentration, by oxygen concentration reduce by 0~
3 percentage points.
It is 10%~95% that the volume of the sample, which accounts for box volume,.
The volume of the cabinet is 0. 001~1 cubic metre.
Heating device is provided in the cabinet, while cabinet is connected to a gas pipeline, the gas pipeline and gas supply fill
Connection is set, the feeder is used to adjust the oxygen concentration in the air provided into cabinet, and the feeder is also used to
The humidity of the air provided into cabinet is provided.
Heating device is provided in the cabinet, the heating device is infrared lamp, also sets up temperature in the cabinet
Sensor.It is additionally provided with oxygen consumable unit, the oxygen concentration detection module of air, air humidity in the cabinet and adjusts unit
And air humidity detection module.It is additionally provided with display device outside the cabinet, is used for the intracorporal temperature of show case, oxygen concentration
And air humidity data.
The present invention is beneficial to be had the technical effect that
The present invention carries out aging by the way that sample to be first placed in cabinet, and the leather sample of leather trunk is placed in container by simulation
Ageing environment, sample is subjected to aging, then the Cr VI in sample is detected again, improve leather trunk reach when six
The accuracy of valence chromium content detection, the Cr VI for avoiding sample before appearing in factory is up to standard, and the sexavalence after dispatching from the factory in sample
Chromium problem not up to standard.
Detailed description of the invention
Fig. 1 is the schematic perspective view of the cabinet in Example 1 and Example 2 of the present invention.
Fig. 2 is the structural block diagram of the cabinet in the embodiment of the present invention 3.
Specific embodiment
In order to which the objects, technical solutions and advantages of invention are more clearly understood, with reference to the accompanying drawings and embodiments, to this
Invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, and does not have to
To limit the present invention.
Embodiment 1
The present embodiment provides the detection methods of Cr VI in a kind of pair of leather trunk, and this method comprises the following steps:
(1) several block leathers in leather trunk to be dispatched from the factory are taken to be placed in the cabinet that volume is 10cm*10cm*10cm, the skin
The percent by volume that the volume of case accounts for cabinet is 50%, is then sealed to cabinet;
As shown in Figure 1, heating device is provided in the cabinet 11, while cabinet is connected to a gas pipeline 12, the flue
Road is connected to feeder 13, and the feeder is used to adjust the oxygen concentration in the air provided into cabinet, the confession
Device of air is also used to adjust the humidity of the air provided into cabinet；The heating device is infrared lamp 111, in the cabinet
Also set up temperature sensor 112；Oxygen concentration detection module, the sky of oxygen consumable unit, air are set in the feeder
Gas humidity adjustment unit and air humidity detection module.It includes humidification subelement and dehumidifier that the air humidity, which adjusts unit to be,
Subelement；It is additionally provided with display device 113 outside the cabinet 11, is used for the intracorporal temperature of show case, oxygen concentration and air
Humidity data；
(2) the intracorporal leather trunk sample of case is heated by heating device, and detects the temperature of leather trunk sample, gradually risen
The temperature of high leather trunk sample is stepped up to 40 DEG C from room temperature, and temperature is stabilized to 40 DEG C;
(3) oxygen concentration is provided into cabinet by feeder is 21%, the air that humidity is 20%;
(4) leather trunk sample aging 72h in above-mentioned cabinet is allowed;
(5) content of 6-valence Cr ions in the leather trunk sample after aging is detected using Cr VI detection device.
Embodiment 2
The present embodiment provides another detection methods to Cr VI in leather trunk, and this method comprises the following steps:
(1) several block leathers in leather trunk to be dispatched from the factory are taken to be placed in the cabinet that volume is 4cm*4cm*8cm, leather trunk volume
The percentage for accounting for box volume is 90%, is then sealed to cabinet;As shown in Figure 1, being provided with heating dress in the cabinet 11
It sets, while cabinet is connected to a gas pipeline 12, which is connected to feeder 13, and the feeder 13 is for adjusting
The oxygen concentration in the air provided into cabinet is saved, the feeder is also used to adjust the wet of the air provided into cabinet
Degree；The heating device is infrared lamp 111, also sets up temperature sensor 112 in the cabinet；
In the feeder setting oxygen consumable unit, the oxygen concentration detection module of air, air humidity adjust unit with
And air humidity detection module.It includes humidification subelement and dehumidifier subelement that the air humidity, which adjusts unit to be,；
It is additionally provided with display device 113 outside the cabinet 11, is used for the intracorporal temperature of show case, oxygen concentration and air humidity
Data；
(2) the intracorporal leather trunk sample of case is heated by heating device, and detects the temperature of leather trunk sample, gradually risen
The temperature of high leather trunk sample is stepped up to 60 DEG C from room temperature, and temperature is stabilized to 60 DEG C;
(3) oxygen concentration is provided into cabinet by feeder is 21%, the air that humidity is 15%;
(4) the intracorporal oxygen concentration of case was reduced by 1 percentage point in every 12 hours, it is after 36 hours, the intracorporal oxygen of case is dense
Degree is stablized 18%;
(5) allowing leather trunk sample again, aging is for 24 hours in above-mentioned cabinet;
(6) content of 6-valence Cr ions in the leather trunk sample after aging is detected using Cr VI detection device.
Embodiment 3
The present embodiment provides another detection methods to Cr VI in leather trunk, and this method comprises the following steps:
(1) several block leathers in leather trunk to be dispatched from the factory are taken to be placed in the cabinet that volume is 10cm*10cm*10cm, leather suitcase body
The percentage that product accounts for box volume is 10%, is then sealed to cabinet;As shown in Fig. 2, being provided with heating dress in the cabinet
It sets, the heating device is infrared lamp, also sets up temperature sensor in the cabinet.Oxygen is additionally provided in the cabinet to disappear
It consumes unit, the oxygen concentration detection module of air, air humidity and adjusts unit and air humidity detection module.The air is wet
It includes humidification subelement and dehumidifier subelement that degree, which adjusts unit to be, is additionally provided with display device outside the cabinet, is used for show case
Intracorporal temperature, oxygen concentration and air humidity data, the oxygen concentration detection module, air humidity detection module and
The intracorporal oxygen concentration of case, air humidity and the intracorporal temperature of case are sent to display device and shown by temperature sensor；
(2) the intracorporal leather trunk sample of case is heated by heating device, and detects the temperature of leather trunk sample, gradually risen
The temperature of high leather trunk sample is stepped up to 80 DEG C from room temperature, and temperature is stabilized to 80 DEG C;
(3) oxygen concentration is provided into cabinet by feeder is 21%, the air that humidity is 10%;
(4) as a child 12, the intracorporal oxygen concentration of case is reduced to 20%;
(5) leather trunk sample aging 12h in above-mentioned cabinet is allowed again;
(6) content of 6-valence Cr ions in the leather trunk sample after aging is detected using Cr VI detection device.
It should be noted that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to preferable
Embodiment describes the invention in detail, those skilled in the art should understand that, it can be to technology of the invention
Scheme is modified or replaced equivalently, and without departing from the spirit and scope of the technical solution of the present invention, should all be covered in this hair
In bright scope of the claims.
Claims (5)
1. the detection method of Cr VI in a kind of pair of leather trunk, which is characterized in that this method comprises the following steps:
(1) sample in leather trunk is placed in aging in a cabinet, the intracorporal temperature of regulating box is 40 DEG C~80 DEG C, and air is wet
Degree is 10%~20%, and ageing time is for 24 hours~72h;The good sample of aging is put into Cr VI detection device and detects Cr VI
Content；
(2) the intracorporal oxygen concentration of regulating box is that 18%~21% pair of sample carries out aging；
(3) it is stepped up the intracorporal temperature of case, constant maximum temperature is gradually increased to by room temperature, maximum temperature range is 40 DEG C
~80 DEG C；
(4) oxygen concentration is reduced by 0~3 percentage point by the concentration for reducing oxygen in cabinet gradually.
2. the detection method of Cr VI in a kind of pair of leather trunk according to claim 1, which is characterized in that the body of the sample
It is 10%~95% that product, which accounts for box volume,.
3. the detection method of Cr VI in a kind of pair of leather trunk according to claim 2, which is characterized in that the body of the cabinet
Product is 0. 001~1 cubic metre.
4. the detection method of Cr VI in a kind of pair of leather trunk according to claim 3, which is characterized in that set in the cabinet
It is equipped with heating device, while cabinet is connected to a gas pipeline, which is connected to feeder, and the feeder is used
In adjusting the oxygen concentration in the air provided into cabinet, the feeder is also used to adjust the air provided into cabinet
Humidity.
5. the detection method of Cr VI in a kind of pair of leather trunk according to claim 3, which is characterized in that set in the cabinet
It is equipped with heating device, the heating device is infrared lamp, also sets up temperature sensor in the cabinet；It is also set in the cabinet
It is equipped with oxygen consumable unit, the oxygen concentration detection module of air, air humidity and adjusts unit and air humidity detection module；
It is additionally provided with display device outside the cabinet, is used for the intracorporal temperature of show case, oxygen concentration and air humidity data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810109201.3A CN110118677A (en) | 2018-02-05 | 2018-02-05 | The detection method of Cr VI in a kind of pair of leather trunk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810109201.3A CN110118677A (en) | 2018-02-05 | 2018-02-05 | The detection method of Cr VI in a kind of pair of leather trunk |
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| Publication Number | Publication Date |
|---|---|
| CN110118677A true CN110118677A (en) | 2019-08-13 |
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ID=67519153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810109201.3A Pending CN110118677A (en) | 2018-02-05 | 2018-02-05 | The detection method of Cr VI in a kind of pair of leather trunk |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202693505U (en) * | 2012-07-25 | 2013-01-23 | 莆田出入境检验检疫局综合技术服务中心 | Leather aging box |
| CN103091139A (en) * | 2012-08-06 | 2013-05-08 | 莆田出入境检验检疫局综合技术服务中心 | Method for detecting hexavalent chromium in export leather |
| CN105296687A (en) * | 2015-11-27 | 2016-02-03 | 峰安皮业股份有限公司 | Method for preventing generation of hexavalent chromium in leather ageing process |
-
2018
- 2018-02-05 CN CN201810109201.3A patent/CN110118677A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202693505U (en) * | 2012-07-25 | 2013-01-23 | 莆田出入境检验检疫局综合技术服务中心 | Leather aging box |
| CN103091139A (en) * | 2012-08-06 | 2013-05-08 | 莆田出入境检验检疫局综合技术服务中心 | Method for detecting hexavalent chromium in export leather |
| CN105296687A (en) * | 2015-11-27 | 2016-02-03 | 峰安皮业股份有限公司 | Method for preventing generation of hexavalent chromium in leather ageing process |
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Application publication date: 20190813 |