CN1088684A - Quick method for checking adulterated peppermint oil - Google Patents
Quick method for checking adulterated peppermint oil Download PDFInfo
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- CN1088684A CN1088684A CN 92114865 CN92114865A CN1088684A CN 1088684 A CN1088684 A CN 1088684A CN 92114865 CN92114865 CN 92114865 CN 92114865 A CN92114865 A CN 92114865A CN 1088684 A CN1088684 A CN 1088684A
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- peppermint oil
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- Fats And Perfumes (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
- Investigating Or Analysing Biological Materials (AREA)
Abstract
The invention discloses a kind of quick method for checking adulterated peppermint oil.Conventional detection needs expensive exact instrument and higher subsidiary conditions, and the time of detecting once is longer.The present invention mixes the congealing point pipe that maybe will fill peppermint oil with the extractant that ethanolic solution or saturated nacl aqueous solution constituted of 60～80% concentration respectively with peppermint oil to place the heat conduction media below 3 ℃ whether to be mixed with mineral oil or alcohol or terebinthina to detect it mutually.This method is simple, and is economical and practical, quick and precisely, not only is applicable to basic unit's purchase spot that a volume is big, also is suitable for producing, the oneself of operating unit checks and accepts.
Description
The present invention is a kind of quick method for checking adulterated peppermint oil, and it belongs to by means of the chemistry of measuring material or physical property is tested or the field of analysis of material, particularly relates to the method that adopts extraction separation method and application testing solidifying point.
Peppermint oil is the high-value goods of extracting voluntarily from the peppermint of its plantation from the peasant, and the existence of some alloys is arranged when finding in purchase.These foreign material can destroy the quality of peppermint oil to some extent, have a strong impact on its use value, bring bigger economic loss also for simultaneously the producer of purchase, processing.The method of existing examination peppermint oil mainly is that traditional nose is heard sensory testing soon, it only can detect effectively to foreign material such as stone, soil block, white sugar, water, and to a few peoples' intentional alloy, then powerless as mineral oil, alcohol, terebinthina, because these alloys do not have this Analysis and Identification content in existing peppermint oil examination and test of products standard, and are difficult for being found.For avoiding economic loss, purchasing department also has the gas chromatograph of use to come alcohol in the Analysis and Identification peppermint oil, terebinthine existence and content, but this needs expensive exact instrument and higher subsidiary conditions (temperature, humidity control, the supply of nitrogen, hydrogen, and professional), and check and analysis were once still needed one hour (time that does not also contain instrument stabilizer), and this is difficult to accomplish in that the purchase of hundreds of rural area is on-the-spot.A kind of method of lacquer quality check is disclosed in CN85109541A.Its purpose is the main quality index according to raw lacquer, provide a kind of at raw lacquer production and purchase in the method for inspection that is easy to use.Formation is with glacial acetic acid (CH
3COOH) solvent is as the oil soluble impurity that is mixed with in the extraction solvent check raw lacquer, with dimethylbenzene (C
8H
10) solvent and distilled water is as the indissoluble and the water-soluble foreign material that are mixed with in the extraction solvent check raw lacquer.Weak point is the adulterant that this method can only be used for checking raw lacquer, and can not detect the alloy in the peppermint oil.
The objective of the invention is to avoid above-mentioned weak point of the prior art and a kind of simple and convenient, economical and practical quick method for checking adulterated peppermint oil is provided.
Purpose of the present invention can reach by following measure: peppermint oil is splashed in the ethanolic solution of 60～80% concentration, becoming turbid or have little oil droplet to separate out with this solution is the judgement that mineral oil exists.Because it is 60～80%: 20～40% solution that are mixed with by volume that peppermint oil can be dissolved in by absolute ethyl alcohol and distilled water entirely, mineral oil is then insoluble; Therefore after the peppermint oil that is mixed with mineral oil was splashed in this solution, smoke-like or separate out oil droplet was white in color because of mineral oil is insoluble.Perhaps with peppermint oil and saturated nacl aqueous solution by volume ratio mix mutually, changing with both sides' volume is the judgement that alcohol exists.Because alcohol can be dissolved in the saturated solution that is mixed with by sodium chloride and distilled water entirely, peppermint oil is then insoluble; And the affinity of alcohol and saturated nacl aqueous solution is greater than the affinity of alcohol and peppermint oil; Like this, by volume the ratio peppermint oil sample that will be mixed with alcohol is with after saturated nacl aqueous solution mixes mutually, and alcohol will be separated out from oil sample and will be dissolved in this solution, thereby the volume of oil sample is reduced.The congealing point pipe that perhaps will fill peppermint oil places the heat conduction media below 3 ℃, and it is the judgement that terebinthina exists that the temperature of solidifying with peppermint oil in the pipe is lower than 10.5 ℃.Because the congealing point of pure peppermint oil is between 10.5～15 ℃, and terebinthine congealing point is worth far below this; After mixing terebinthina in the peppermint oil, its congealing point will descend.These three kinds of methods can detect mineral oil (kerosene or diesel oil or transformer oil) or alcohol or the terebinthina that mixes in the peppermint oil qualitatively.
Purpose of the present invention can also reach by following measure: the peppermint oil of 0.5～1.5 volume is dropwise splashed in the ethanolic solution of 70% concentration of 8.5～9.5 volumes, or the peppermint oil of equal volume mixed mutually with saturated nacl aqueous solution, the congealing point pipe that maybe will fill peppermint oil places air or water or the ice below 3 ℃, stirs the peppermint oil sample to solidifying with thermometer.Can detect quantitatively like this and mix mineral oil or alcohol or terebinthine content in the peppermint oil, its detectability is respectively 1%, 2% and 5%.
The present invention has following advantage compared to existing technology:
1. simple to operate, easy to use, general personnel only need can operate and judge through short-term study, understanding;
2. the solution that is used to check, the consumption of peppermint oil sample are few, and proving time is short, thus detect with low cost;
3. neither need valuable exact instrument, also do not need harsh test condition and environmental requirement, and be easy to judge exactly whether mix puppet in the oil, receive the big actual conditions of oil drop volume so be applicable to basic unit.
Below in conjunction with embodiment the present invention is further described:
Embodiment 1:
During room temperature, in the scale division of tool glass plug is the 10ml glass cylinder of 0.2ml, be equipped with the ethanolic solution of 9ml70% concentration, peppermint oil sample 1ml to be checked is dropwise splashed in this graduated cylinder, observe oil droplet top-down dissolved state in graduated cylinder.If being transparent or thread transparent (being little blue look sometimes) all shows and does not mix mineral oil in the peppermint oil; If oil sample makes in the graduated cylinder solution be opaque and white smoke-like (put for a long time and do not clarify) or have little oil droplet to separate out in course of dissolution and is suspended in solution surface, then show to be mixed with mineral oil (kerosene or diesel oil or transformer oil) in this oil sample.
Embodiment 2
During room temperature, in the scale division of tool glass plug is the 10ml scale glass test tube of 0.1ml, add the 5ml saturated nacl aqueous solution exactly earlier, and then add the tested peppermint oil sample of 5ml exactly; Fully vibrate after covering tight stopper, place a moment, when treating that oil phase and water layering are complete, read the volume ml number of oil reservoir phase.If volume does not become (still into adding fashionable 5ml), then show in this oil sample and do not mix alcohol; If volume reduces, show then in this oil sample to be mixed with alcohol that incorporation calculates by following formula:
Mix alcohol amount %(V/V in the oil sample)=(5ml-vibration back oil reservoir volume (ml))/(5ml) * 100%.
Embodiment 3
Get an about 18mm of diameter, the glass test tube that is about 200mm is as the congealing point pipe, is that 0.1 ℃ microthermometer indicates congealing point and the double stirring rod of doing to use with 0～50 ℃, scale division.Tested peppermint oil sample poured into be the high oil column of 30～40mm in the congealing point pipe, insert thermometer, this congealing point pipe is placed ice-water bath, (the mercury bulb part of thermometer should all place oil sample to stir oil sample with thermometer, distance about 10mm should be arranged at mercury bulb and test tube bottom), solidify until oil sample.Stop to stir this moment, reads its congealing point, then shows in this oil sample and be mixed with terebinthina if be lower than 10.5 ℃.The detectability of this method is 〉=5%, promptly mixes terebinthine amount and reaches 5% or all can be detected by this law when above.
Claims (4)
1, a kind of quick method for checking adulterated peppermint oil, feature of the present invention is:
(1) peppermint oil is splashed in the ethanolic solution of 60～80% concentration, becoming turbid or have little oil droplet to separate out with this solution is the judgement that mineral oil exists, perhaps
(2) with peppermint oil and saturated nacl aqueous solution by volume ratio mix mutually, changing with both sides' volume is the judgement that alcohol has, perhaps
(3) the congealing point pipe that will fill peppermint oil places the heat conduction media below 3 ℃, and it is the judgement that terebinthina exists that the temperature of solidifying with peppermint oil in the pipe is lower than 10.5 ℃.
2, survey method according to claim 1 is characterized in that peppermint oil with 0.5～1.5 volume dropwise splashes in the ethanolic solution of 70% concentration of 8.5～9.5 volumes.
3, survey method according to claim 1 is characterized in that the peppermint oil of equal volume is mixed mutually with saturated nacl aqueous solution.
4, survey method according to claim 1 is characterized in that the congealing point pipe that will fill peppermint oil places air or water or the ice below 3 ℃, stirs oil sample to solidifying with thermometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92114865 CN1033470C (en) | 1992-12-19 | 1992-12-19 | Quick method for checking adulterated peppermint oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92114865 CN1033470C (en) | 1992-12-19 | 1992-12-19 | Quick method for checking adulterated peppermint oil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1088684A true CN1088684A (en) | 1994-06-29 |
| CN1033470C CN1033470C (en) | 1996-12-04 |
Family
ID=4947138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92114865 Expired - Fee Related CN1033470C (en) | 1992-12-19 | 1992-12-19 | Quick method for checking adulterated peppermint oil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1033470C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743741A (en) * | 2013-12-21 | 2014-04-23 | 广西科技大学 | Mineral oil detection reagent and application thereof |
| CN104792949A (en) * | 2015-05-09 | 2015-07-22 | 蔡建法 | Camellia oil purity detection needle |
-
1992
- 1992-12-19 CN CN 92114865 patent/CN1033470C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743741A (en) * | 2013-12-21 | 2014-04-23 | 广西科技大学 | Mineral oil detection reagent and application thereof |
| CN104792949A (en) * | 2015-05-09 | 2015-07-22 | 蔡建法 | Camellia oil purity detection needle |
| CN104792949B (en) * | 2015-05-09 | 2016-06-29 | 蔡建法 | A kind of Camellia oil purity detecting pin |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1033470C (en) | 1996-12-04 |
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| C14 | Grant of patent or utility model | ||
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| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |