CN106769601A - A kind of convenient content method for determining organic acid and wood tar in pyrolkigneous liquid - Google Patents
A kind of convenient content method for determining organic acid and wood tar in pyrolkigneous liquid Download PDFInfo
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- CN106769601A CN106769601A CN201611173804.7A CN201611173804A CN106769601A CN 106769601 A CN106769601 A CN 106769601A CN 201611173804 A CN201611173804 A CN 201611173804A CN 106769601 A CN106769601 A CN 106769601A
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- pyrolkigneous liquid
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
Abstract
The invention discloses a kind of convenient content method for determining organic acid and wood tar in pyrolkigneous liquid.Belong to natural products analysis test evaluation technical field.Pyrolkigneous liquid quality mainly sees organic acid content, the good price of content then quality high, next see be wood tar content, the low then smell of burning of content is lighter, and quality is good.It is to use expensive gas chromatography mass spectrometry (GCMS) method to determine content at present, test is complicated, it is not high to take many, expensive, test accuracy, provide excessive priceless value information, therefore, pyrolkigneous liquid cannot convenient science determine and further result in the technical barrier that pyrolkigneous liquid quality cannot be judged.The inventive method, can be in experimental determination, it is also possible to go to outdoor production base to determine, it is thus only necessary to heat small electric apparatus, magnetic stirring apparatus, small-size electronic scale, PH precision test papers, beaker etc. and be put into a suitcase.Determine by one people of a sample needs only to half an hour and complete.
Description
Technical field
The present invention relates to a kind of convenient content method for determining organic acid and wood tar in pyrolkigneous liquid, belong to natural products survey
Examination assessment technique field.It is specifically a kind of quick, accurate, cheap, convenient to determine organic acid and wood tar in pyrolkigneous liquid
Content method, there is provided pyrolkigneous liquid quality good or not and price are referred to.
Background technology
Pyrolkigneous liquid is to collect the brown that the gas for obtaining is condensed at normal temperatures after being pyrolyzed by timber and its industrial wood waste
Liquid material.The definition of the pyrolkigneous liquid in the present invention is wood machining residues through accessory substance obtained from high temperature pyrolysis.At present,
During timber is processed into corresponding charcoal, due to efficiently being produced using the machine of modernization, in process of production
The accessory substance pyrolkigneous liquid of generation, is difficult to form standardized product and be difficult to market-oriented application always.At present determine analysis pyrolkigneous liquid into
It is to use expensive gas chromatography mass spectrometry (GCMS) method to divide, and test is complicated, take many, expensive, test accuracy receives
Technology and the qualification larger, constituent analysis of influence of tester provide excessive to the valueless letter of pyrolkigneous liquid quality
Breath, factors above, cause pyrolkigneous liquid cannot convenient science determine and further result in the situation that pyrolkigneous liquid quality cannot be judged.By
The method for firing charcoal in different enterprises is different or even widely different, and the temperature and period for collecting pyrolkigneous liquid also vary,
Cause the quality of pyrolkigneous liquid to judge without forensic science, and only judge by PH, the sensory methods seen color and hear taste, lead very much
See, it is impossible to realize quick cheap science assay method.In general, the quality for evaluating pyrolkigneous liquid typically sees organic acid content
How much, content is higher, and quality is better, and price is more expensive, next see wood tar content how much, its content is lower, and the smell of burning is lighter, matter
Amount is better, therefore, evaluate a quality for pyrolkigneous liquid sample, it is main since more than 2 indexs judge.It is contemplated that using technology
Means solve the determination techniques problem of pyrolkigneous liquid marketization useful component and harmful components, and the inventive method can be in laboratory
Determine, it is also possible to go to outdoor production base to determine, it is thus only necessary to heat small electric apparatus, magnetic stirring apparatus, small-size electronic scale, PH accurate
Test paper, beaker etc. are put into a suitcase.Determine by one people of a sample needs only to half an hour and complete.
The content of the invention
It is an object of the invention to the test complexity, time-consuming many, expensive, the test standard that overcome existing measuring technology to exist
Exactness is high, the shortcomings of excessive priceless value information is provided, there is provided it is a kind of convenient to determine containing for organic acid and wood tar in pyrolkigneous liquid
Amount method, it is only necessary to heat small electric apparatus, magnetic stirring apparatus, small-size electronic scale, PH precision test papers, beaker etc. and be put into a suitcase
.Determine by one people of a sample needs only to half an hour and complete, testing expense is several by gas chromatography mass spectrometry (GCMS) method
It shortens to half an hour, and expense is reduced to 30 yuan for 3000 yuan, not only determines indoors by each sample, it is also possible in outdoor survey
It is fixed.
Number is the percentage number of weight in present specification.
A kind of convenient content method for determining organic acid and wood tar in pyrolkigneous liquid, it is characterised in that described 5
Step is specifically divided into following：
1) alkaline solution that the NaOH or KOH of 1-20% are prepared with distilled water is standby, and 50-500g pyrolkigneous liquid is weighed with beaker
(being calculated as X grams), in the case of being stirred continuously, is gradually added into standby alkaline solution, untill the PH=5-10 of liquid (or make
Use soda acid potentiometric titrimeter), the volume amount of the added alkali lye of metering calculates NaOH or KOH Solute mass (grams) and is calculated as A grams；
2) above-mentioned equivalent pyrolkigneous liquid (being calculated as X grams) is taken, electrically heated drying cabinet is put into and is heated to 90-150 DEG C, or use electric heating
Against beaker pyrolkigneous liquid blowing hot-air, until evaporating completely, it is wood tar to weigh black residue to hair-dryer, is calculated as B grams；
3) in the case of being stirred continuously, the standby alkali lye in being added 1) in the beaker to 2) wood tar, until tar is complete
Untill dissolving, the volume amount of the added alkali lye of metering calculates NaOH or KOH Solute mass (grams) and is calculated as C grams；
4) E grams of the gross mass grams (equivalent acetic acid) and percent concentration of contained organic acid in pyrolkigneous liquid are calculated, according to upper
State chemical reaction equation (CH3COOH+NaOH=CH3COONa+H2O；Or CH3COOH+KOH=CH3COOK+H2O), i.e. E=
(A-C) × 60/40 (NaOH is used), or E=(A-C) × 60/56 (using KOH)；
5) in pyrolkigneous liquid contained organic acid (equivalent acetic acid) concentration (being calculated as F) F=E/X × 100%；The content of wood tar
=B/X × 100%
The content method of organic acid and wood tar in described a kind of convenient measure pyrolkigneous liquid, it is characterised in that described the
The alkaline solution that one step prepares the NaOH or KOH of 1-20% with distilled water is standby, weighs 50-500g pyrolkigneous liquid with beaker and (is calculated as X
Gram), in the case of being stirred continuously, standby alkaline solution is gradually added into, untill the PH=5-10 of liquid (or use soda acid
Potentiometric titrimeter), the volume amount of the added alkali lye of metering calculates NaOH or KOH Solute mass (grams) and is calculated as A grams；Further
The alkaline solution for being optimized to the NaOH or KOH that prepare 2-10% with distilled water is standby, and 100-250g pyrolkigneous liquid (meter is weighed with beaker
It is X grams), in the case of being stirred continuously, standby alkaline solution is gradually added into, untill the PH=6-9 of liquid (or use acid
Alkali potentiometric titrimeter), the volume amount of the added alkali lye of metering calculates NaOH or KOH Solute mass (grams) and is calculated as A grams.
The content method of organic acid and wood tar in described a kind of convenient measure pyrolkigneous liquid, it is characterised in that described the
The alkaline solution that one step prepares the NaOH or KOH of 2-10% with distilled water is standby, weighs 100-250g pyrolkigneous liquid with beaker and (is calculated as
X grams), in the case of being stirred continuously, standby alkaline solution is gradually added into, untill the PH=6-8 of liquid (or use soda acid
Potentiometric titrimeter), the volume amount of the added alkali lye of metering calculates NaOH or KOH Solute mass (grams) and is calculated as A grams.Further
The alkaline solution for being optimized to the NaOH or KOH that prepare 4-5% with distilled water is standby, and 150-200g pyrolkigneous liquid (meter is weighed with beaker
It is X grams), in the case of being stirred continuously, standby alkaline solution is gradually added into, untill the PH=7-8 of liquid (or use acid
Alkali potentiometric titrimeter), the volume amount of the added alkali lye of metering calculates NaOH or KOH Solute mass (grams) and is calculated as A grams.
The content method of organic acid and wood tar in described a kind of convenient measure pyrolkigneous liquid, it is characterised in that described the
Two steps take it is above-mentioned be put into electrically heated drying cabinet heating be further optimized to 110-120 DEG C
Specific embodiment
Hereinafter the present invention will just be further described by example.
Example 1
1) the NaOH alkaline solutions with distilled water preparation 1% are standby, and 50g pyrolkigneous liquid (being calculated as X=50) is weighed with beaker,
In the case of being stirred continuously, standby alkaline solution is gradually added into, untill the PH=5 of liquid, the volume number of the added alkali lye of metering
It is 150ml to measure, and calculates NaOH Solute mass (grams) and is calculated as A=1.50 grams；
2) above-mentioned equivalent 50g pyrolkigneous liquid (being calculated as X=50 grams) is taken, electrically heated drying cabinet is put into and is heated to 90 DEG C, until liquid
Volatilization is complete, and it is that wood tar is 0.42 gram to weigh black residue, is calculated as B=0.42 grams；
3) in the case of being stirred continuously, the standby alkali lye in being added 1) in the beaker to 2) wood tar, until tar is complete
Untill dissolving, the volume amount 30ml of the added alkali lye of metering calculates 0.30 gram of NaOH Solute mass (grams) and is calculated as C grams of (C=
0.30 gram)；
4) E grams of the gross mass grams (equivalent acetic acid) and percent concentration of contained organic acid in pyrolkigneous liquid are calculated, according to upper
State chemical reaction equation (CH3COOH+NaOH=CH3COONa+H2O), i.e. E=(A-C) × 60/40=(1.50-0.30) ×
60/40=1.8 grams；
5) in pyrolkigneous liquid contained organic acid (equivalent acetic acid) concentration (being calculated as F) F=E/X × 100%=1.8/50 ×
100%=3.6%；Content=B/X × 100%=0.42/50 × the 100%=0.84% of wood tar
The organic acid content (with Acetometer) of above-mentioned pyrolkigneous liquid is 3.6%, wood tar content 0.84%.
Example 2
1) the NaOH alkaline solutions with distilled water preparation 2% are standby, and 100g pyrolkigneous liquid (being calculated as X=100) is weighed with beaker,
In the case of being stirred continuously, standby alkaline solution is gradually added into, untill the PH=6 of liquid, the volume of the added alkali lye of metering
Quantity is 216ml, calculates NaOH Solute mass (grams) and is calculated as A=4.32 grams；
2) above-mentioned equivalent 100g pyrolkigneous liquid (being calculated as X=100 grams) is taken, electrically heated drying cabinet is put into and is heated to 100 DEG C, until liquid
Body volatilization is complete, and it is that wood tar is 1.44 grams to weigh black residue, is calculated as B=1.44 grams；
3) in the case of being stirred continuously, the standby alkali lye in being added 1) in the beaker to 2) wood tar, until tar is complete
Untill dissolving, the volume amount 42ml of the added alkali lye of metering calculates 0.84 gram of NaOH Solute mass (grams) and is calculated as C grams of (C=
0.84 gram)；
4) E grams of the gross mass grams (equivalent acetic acid) and percent concentration of contained organic acid in pyrolkigneous liquid are calculated, according to upper
State chemical reaction equation (CH3COOH+NaOH=CH3COONa+H2O), i.e. E=(A-C) × 60/40=(4.32-0.84) ×
60/40=5.22 grams；
5) in pyrolkigneous liquid contained organic acid (equivalent acetic acid) concentration (being calculated as F) F=E/X × 100%=5.22/100 ×
100%=5.22%；Content=B/X × 100%=1.44/100 × the 100%=1.44% of wood tar
The organic acid content (with Acetometer) of above-mentioned pyrolkigneous liquid is 5.22%, wood tar content 1.44%.
Example 3
1) the NaOH alkaline solutions with distilled water preparation 4% are standby, and 200g pyrolkigneous liquid (being calculated as X=200) is weighed with beaker,
In the case of being stirred continuously, standby alkaline solution is gradually added into, untill the PH=7 of liquid, the volume of the added alkali lye of metering
Quantity is 325ml, calculates NaOH Solute mass (grams) and is calculated as A=13 grams；
2) above-mentioned equivalent 200g pyrolkigneous liquid (being calculated as X=200 grams) is taken, electrically heated drying cabinet is put into and is heated to 110 DEG C, until liquid
Body volatilization is complete, and it is that wood tar is 3.9 grams to weigh black residue, is calculated as B=3.9 grams；
3) in the case of being stirred continuously, the standby alkali lye in being added 1) in the beaker to 2) wood tar, until tar is complete
Untill dissolving, the volume amount 52ml of the added alkali lye of metering calculates 2.08 grams of NaOH Solute mass (grams) and is calculated as C grams of (C=
2.08 grams)；
4) E grams of the gross mass grams (equivalent acetic acid) and percent concentration of contained organic acid in pyrolkigneous liquid are calculated, according to upper
State chemical reaction equation (CH3COOH+NaOH=CH3COONa+H2O), i.e. E=(A-C) × 60/40=(13-2.08) × 60/
40=18.33 grams；
5) in pyrolkigneous liquid contained organic acid (equivalent acetic acid) concentration (being calculated as F) F=E/X × 100%=14.1/200 ×
100%=9.17%；Content=B/X × 100%=3.0/200 × the 100%=1.95% of wood tar
The organic acid content (with Acetometer) of above-mentioned pyrolkigneous liquid is 9.17%, wood tar content 1.95%.
Example 4
1) the NaOH alkaline solutions with distilled water preparation 10% are standby, weigh 250g pyrolkigneous liquid with beaker and (are calculated as X=
250), in the case of being stirred continuously, standby alkaline solution is gradually added into, untill the PH=8 of liquid, the added alkali lye of metering
Volume amount is 195ml, calculates NaOH Solute mass (grams) and is calculated as A=19.5 grams；
2) above-mentioned equivalent 250g pyrolkigneous liquid (being calculated as X=250 grams) is taken, electrically heated drying cabinet is put into and is heated to 120 DEG C, until liquid
Body volatilization is complete, and it is that wood tar is 3.9 grams to weigh black residue, is calculated as B=3.9 grams；
3) in the case of being stirred continuously, the standby alkali lye in being added 1) in the beaker to 2) wood tar, until tar is complete
Untill dissolving, the volume amount 41.6ml of the added alkali lye of metering calculates 4.16 grams of NaOH Solute mass (grams) and is calculated as C grams of (C=
4.16 grams)；
4) E grams of the gross mass grams (equivalent acetic acid) and percent concentration of contained organic acid in pyrolkigneous liquid are calculated, according to upper
State chemical reaction equation (CH3COOH+NaOH=CH3COONa+H2O), i.e. E=(A-C) × 60/40=(19.5-4.16) ×
60/40=23.1 grams；
5) in pyrolkigneous liquid contained organic acid (equivalent acetic acid) concentration (being calculated as F) F=E/X × 100%=23.1/250 ×
100%=9.24%；Content=B/X × 100%=4.16/250 × the 100%=1.66% of wood tar
The organic acid content (with Acetometer) of above-mentioned pyrolkigneous liquid is 9.24%, wood tar content 1.66%.
Example 5
1) the NaOH alkaline solutions with distilled water preparation 20% are standby, weigh 500g pyrolkigneous liquid with beaker and (are calculated as X=
500), in the case of being stirred continuously, standby alkaline solution is gradually added into, untill the PH=9 of liquid, the added alkali lye of metering
Volume amount is 440ml, calculates NaOH Solute mass (grams) and is calculated as A=88 grams；
2) above-mentioned equivalent 500g pyrolkigneous liquid (being calculated as X=500 grams) is taken, electrically heated drying cabinet is put into and is heated to 120 DEG C, until liquid
Body volatilization is complete, and it is that wood tar is 16.5 grams to weigh black residue, is calculated as B=16.5 grams；
3) in the case of being stirred continuously, the standby alkali lye in being added 1) in the beaker to 2) wood tar, until tar is complete
Untill dissolving, the volume amount 110ml of the added alkali lye of metering calculates 22 grams of NaOH Solute mass (grams) and is calculated as C grams of (C=22
Gram)；
4) E grams of the gross mass grams (equivalent acetic acid) and percent concentration of contained organic acid in pyrolkigneous liquid are calculated, according to upper
State chemical reaction equation (CH3COOH+NaOH=CH3COONa+H2O), i.e. E=(A-C) × 60/40=(88-22) × 60/40
=99 grams；
5) in pyrolkigneous liquid contained organic acid (equivalent acetic acid) concentration (being calculated as F) F=E/X × 100%=99/500 ×
100%=19.8%；Content=B/X × 100%=16.5/500 × the 100%=3.3% of wood tar
The organic acid content (with Acetometer) of above-mentioned pyrolkigneous liquid is 19.8%, wood tar content 3.3%.
Example 6
1) the KOH alkaline solutions with distilled water preparation 1% are standby, and 50g pyrolkigneous liquid (being calculated as X=50) is weighed with beaker,
In the case of being stirred continuously, standby alkaline solution is gradually added into, untill the PH=5 of liquid, the volume number of the added alkali lye of metering
It is 137.5ml to measure, and calculates KOH Solute mass (grams) and is calculated as A=1.38 grams；
2) above-mentioned equivalent 50g pyrolkigneous liquid (being calculated as X=50 grams) is taken, electrically heated drying cabinet is put into and is heated to 90 DEG C, until liquid
Volatilization is complete, and it is that wood tar is 0.39 gram to weigh black residue, is calculated as B=0.39 grams；
3) in the case of being stirred continuously, the standby alkali lye in being added 1) in the beaker to 2) wood tar, until tar is complete
Untill dissolving, the volume amount 28ml of the added alkali lye of metering calculates 0.28 gram of KOH Solute mass (grams) and is calculated as C grams of (C=
0.28 gram)；
4) E grams of the gross mass grams (equivalent acetic acid) and percent concentration of contained organic acid in pyrolkigneous liquid are calculated, according to upper
State chemical reaction equation CH3COOH+KOH=CH3COOK+H2O, i.e. E=(A-C) × 60/56=(1.38-0.28) × 60/56
=1.18 grams；
5) in pyrolkigneous liquid contained organic acid (equivalent acetic acid) concentration (being calculated as F) F=E/X × 100%=1.18/50 ×
100%=2.36%；Content=B/X × 100%=0.39/50 × the 100%=0.78% of wood tar
The organic acid content (with Acetometer) of above-mentioned pyrolkigneous liquid is 2.36%, wood tar content 0.78%.
Example 7
1) the KOH alkaline solutions with distilled water preparation 2% are standby, and 100g pyrolkigneous liquid (being calculated as X=100) is weighed with beaker,
In the case of being stirred continuously, standby alkaline solution is gradually added into, untill the PH=6 of liquid, the volume of the added alkali lye of metering
Quantity is 220ml, calculates KOH Solute mass (grams) and is calculated as A=4.4 grams；
2) above-mentioned equivalent 100g pyrolkigneous liquid (being calculated as X=100 grams) is taken, electrically heated drying cabinet is put into and is heated to 100 DEG C, until liquid
Body volatilization is complete, and it is that wood tar is 1.32 grams to weigh black residue, is calculated as B=1.32 grams；
3) in the case of being stirred continuously, the standby alkali lye in being added 1) in the beaker to 2) wood tar, until tar is complete
Untill dissolving, the volume amount 39ml of the added alkali lye of metering calculates 0.78 gram of NaOH Solute mass (grams) and is calculated as C grams of (C=
0.78 gram)；
4) E grams of the gross mass grams (equivalent acetic acid) and percent concentration of contained organic acid in pyrolkigneous liquid are calculated, according to upper
State chemical reaction equation (CH3COOH+KOH=CH3COOK+H2O), i.e. E=(A-C) × 60/56=(4.4-0.78) × 60/56
=3.88 grams；
5) in pyrolkigneous liquid contained organic acid (equivalent acetic acid) concentration (being calculated as F) F=E/X × 100%=3.88/100 ×
100%=3.88%；Content=B/X × 100%=1.32/100 × the 100%=1.32% of wood tar
The organic acid content (with Acetometer) of above-mentioned pyrolkigneous liquid is 3.88%, wood tar content 1.32%.
Example 8
1) the KOH alkaline solutions with distilled water preparation 4% are standby, and 200g pyrolkigneous liquid (being calculated as X=200) is weighed with beaker,
In the case of being stirred continuously, standby alkaline solution is gradually added into, untill the PH=7 of liquid, the volume of the added alkali lye of metering
Quantity is 360ml, calculates NaOH Solute mass (grams) and is calculated as A=14.4 grams；
2) above-mentioned equivalent 200g pyrolkigneous liquid (being calculated as X=200 grams) is taken, electrically heated drying cabinet is put into and is heated to 110 DEG C, until liquid
Body volatilization is complete, and it is that wood tar is 3.6 grams to weigh black residue, is calculated as B=3.6 grams；
3) in the case of being stirred continuously, the standby alkali lye in being added 1) in the beaker to 2) wood tar, until tar is complete
Untill dissolving, the volume amount 48ml of the added alkali lye of metering calculates 1.92 grams of KOH Solute mass (grams) and is calculated as C grams of (C=
1.92 grams)；
4) E grams of the gross mass grams (equivalent acetic acid) and percent concentration of contained organic acid in pyrolkigneous liquid are calculated, according to upper
State chemical reaction equation (CH3COOH+KOH=CH3COOK+H2O), i.e. E=(A-C) × 60/56=(14.4-1.92) × 60/
56=13.37 grams；
5) in pyrolkigneous liquid contained organic acid (equivalent acetic acid) concentration (being calculated as F) F=E/X × 100%=13.37/200 ×
100%=6.69%；Content=B/X × 100%=3.6/200 × the 100%=1.8% of wood tar
The organic acid content (with Acetometer) of above-mentioned pyrolkigneous liquid is 6.69%, wood tar content 1.8%.
Example 9
1) the KOH alkaline solutions with distilled water preparation 10% are standby, and 250g pyrolkigneous liquid (being calculated as X=250) is weighed with beaker,
In the case of being stirred continuously, standby alkaline solution is gradually added into, untill the PH=8 of liquid, the volume of the added alkali lye of metering
Quantity is 300ml, calculates NaOH Solute mass (grams) and is calculated as A=30 grams；
2) above-mentioned equivalent 250g pyrolkigneous liquid (being calculated as X=250 grams) is taken, electrically heated drying cabinet is put into and is heated to 120 DEG C, until liquid
Body volatilization is complete, and it is that wood tar is 3.6 grams to weigh black residue, is calculated as B=3.6 grams；
3) in the case of being stirred continuously, the standby alkali lye in being added 1) in the beaker to 2) wood tar, until tar is complete
Untill dissolving, the volume amount 42ml of the added alkali lye of metering calculates 4.2 grams of KOH Solute mass (grams) and is calculated as C grams of (C=4.2
Gram)；
4) E grams of the gross mass grams (equivalent acetic acid) and percent concentration of contained organic acid in pyrolkigneous liquid are calculated, according to upper
State chemical reaction equation (CH3COOH+KOH=CH3COOK+H2O), i.e. E=(A-C) × 60/56=(30-4.2) × 60/56=
27.64 grams；
5) in pyrolkigneous liquid contained organic acid (equivalent acetic acid) concentration (being calculated as F) F=E/X × 100%=27.64/250 ×
100%=11.08%；Content=B/X × 100%=3.6/250 × the 100%=1.44% of wood tar
The organic acid content (with Acetometer) of above-mentioned pyrolkigneous liquid is 11.08%, wood tar content 1.44%.
Example 10
1) the KOH alkaline solutions with distilled water preparation 20% are standby, and 500g pyrolkigneous liquid (being calculated as X=500) is weighed with beaker,
In the case of being stirred continuously, standby alkaline solution is gradually added into, untill the PH=9 of liquid, the volume of the added alkali lye of metering
Quantity is 550ml, calculates NaOH Solute mass (grams) and is calculated as A=110 grams；
2) above-mentioned equivalent 500g pyrolkigneous liquid (being calculated as X=500 grams) is taken, electrically heated drying cabinet is put into and is heated to 120 DEG C, until liquid
Body volatilization is complete, and it is that wood tar is 16.5 grams to weigh black residue, is calculated as B=16.5 grams；
3) in the case of being stirred continuously, the standby alkali lye in being added 1) in the beaker to 2) wood tar, until tar is complete
Untill dissolving, the volume amount 140ml of the added alkali lye of metering calculates 28 grams of KOH Solute mass (grams) and is calculated as C grams of (C=28
Gram)；
4) E grams of the gross mass grams (equivalent acetic acid) and percent concentration of contained organic acid in pyrolkigneous liquid are calculated, according to upper
State chemical reaction equation (CH3COOH+KOH=CH3COOK+H2O), i.e. E=(A-C) × 60/56=(110-28) × 60/56=
87.86 grams；
5) in pyrolkigneous liquid contained organic acid (equivalent acetic acid) concentration (being calculated as F) F=E/X × 100%=87.86/500 ×
100%=17.57%；Content=B/X × 100%=16.5/500 × the 100%=3.3% of wood tar
The organic acid content (with Acetometer) of above-mentioned pyrolkigneous liquid is 17.57%, wood tar content 3.3%.
Below by way of experiment explanation foregoing invention test effect and the Comparative result of conventional test methodologies
Table embodiment 1-10 methods survey the contrast of organic acid (with Acetometer) and wood tar content
Table as shown by data, embodiment 1-10 is to the organic acid content of different sample pyrolkigneous liquid and the data of wood tar content
With conventional test methodologies Data Comparison relatively, error is within 95% scope, it is seen that the method is for test accuracy
For, it is excellent.
Claims (4)
1. it is a kind of it is convenient determine pyrolkigneous liquid in organic acid and wood tar content method, it is characterised in that it is characterized in that described
5 steps are specifically divided into following：
1) alkaline solution that the NaOH or KOH of 1-20% are prepared with distilled water is standby, and 50-500g pyrolkigneous liquid (meter is weighed with beaker
It is X grams), in the case of being stirred continuously, standby alkaline solution is gradually added into, untill the PH=5-10 of liquid (or use
Soda acid potentiometric titrimeter), the volume amount of the added alkali lye of metering calculates NaOH or KOH Solute mass (grams) and is calculated as A grams；
2) above-mentioned equivalent pyrolkigneous liquid (being calculated as X grams) is taken, electrically heated drying cabinet is put into and is heated to 90-150 DEG C, or use electrothermal blowing
Against beaker pyrolkigneous liquid blowing hot-air, until evaporating completely, it is wood tar to weigh black residue to machine, is calculated as B grams；
3) in the case of being stirred continuously, the standby alkali lye in being added 1) in the beaker to 2) wood tar, until tar is completely dissolved
Untill, the volume amount of the added alkali lye of metering calculates NaOH or KOH Solute mass (grams) and is calculated as C grams；
4) E grams of the gross mass grams (equivalent acetic acid) and percent concentration of contained organic acid in pyrolkigneous liquid are calculated, according to above-mentionedization
Learn reactional equation (CH3COOH+NaOH=CH3COONa+H2O；Or CH3COOH+KOH=CH3COOK+H2O), i.e. E=(A-
C) × 60/40 (NaOH is used), or E=(A-C) × 60/56 (using KOH)；
5) in pyrolkigneous liquid contained organic acid (equivalent acetic acid) concentration (being calculated as F) F=E/X × 100%；Content=the B/ of wood tar
X × 100%
2. it is according to claim 1 it is a kind of it is convenient determine pyrolkigneous liquid in organic acid and wood tar content method, its feature
The alkaline solution that the first step described in being further is optimized to the NaOH or KOH that prepare 2-10% with distilled water is standby, with burning
Cup weighs 100-250g pyrolkigneous liquid (being calculated as X grams), in the case of being stirred continuously, standby alkaline solution is gradually added into, until liquid
PH=6-9 untill (or using soda acid potentiometric titrimeter), the volume amount of the added alkali lye of metering calculates NaOH or KOH molten
Matter quality (grams) is calculated as A grams.
3. it is according to claim 1 it is a kind of it is convenient determine pyrolkigneous liquid in organic acid and wood tar content method, its feature
The alkaline solution that the first step described in being further is optimized to the NaOH or KOH that prepare 4-5% with distilled water is standby, uses beaker
150-200g pyrolkigneous liquid (being calculated as X grams) is weighed, in the case of being stirred continuously, standby alkaline solution is gradually added into, until liquid
Untill PH=7-8 (or using soda acid potentiometric titrimeter), the volume amount of the added alkali lye of metering calculates NaOH or KOH solutes
Quality (grams) is calculated as A grams.
4. it is according to claim 1 it is a kind of it is convenient determine pyrolkigneous liquid in organic acid and wood tar content method, its feature
It is that described second step takes and above-mentioned be put into electrically heated drying cabinet heating and be further optimized to 110-120 DEG C.
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