CN113533117B - Method for measuring retention of impregnating liquid on plant leaf surface - Google Patents
Method for measuring retention of impregnating liquid on plant leaf surface Download PDFInfo
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- CN113533117B CN113533117B CN202110806339.0A CN202110806339A CN113533117B CN 113533117 B CN113533117 B CN 113533117B CN 202110806339 A CN202110806339 A CN 202110806339A CN 113533117 B CN113533117 B CN 113533117B
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- PSOVNZZNOMJUBI-UHFFFAOYSA-N chlorantraniliprole Chemical compound CNC(=O)C1=CC(Cl)=CC(C)=C1NC(=O)C1=CC(Br)=NN1C1=NC=CC=C1Cl PSOVNZZNOMJUBI-UHFFFAOYSA-N 0.000 description 2
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- NKMACDZTGYLEFW-UHFFFAOYSA-N calcium;furan-2,5-dione Chemical compound [Ca].O=C1OC(=O)C=C1 NKMACDZTGYLEFW-UHFFFAOYSA-N 0.000 description 1
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- 238000011156 evaluation Methods 0.000 description 1
- XUZHLZDRCCUWEV-UHFFFAOYSA-N formaldehyde;methyl naphthalene-1-sulfonate Chemical compound O=C.C1=CC=C2C(S(=O)(=O)OC)=CC=CC2=C1 XUZHLZDRCCUWEV-UHFFFAOYSA-N 0.000 description 1
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- SNQQPOLDUKLAAF-UHFFFAOYSA-N nonylphenol Chemical compound CCCCCCCCCC1=CC=CC=C1O SNQQPOLDUKLAAF-UHFFFAOYSA-N 0.000 description 1
- 230000000361 pesticidal effect Effects 0.000 description 1
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- 235000010482 polyoxyethylene sorbitan monooleate Nutrition 0.000 description 1
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01N5/02—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content
- G01N5/025—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content for determining moisture content
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- Physics & Mathematics (AREA)
- 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)
- Sampling And Sample Adjustment (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Investigating Or Analysing Biological Materials (AREA)
Abstract
The invention discloses a kind ofA method for measuring the retention of an impregnating solution on the surface of a plant leaf. Firstly, preparing liquid medicine, placing tweezers into a container for loading the liquid medicine after the liquid medicine to be tested is prepared, then placing the tweezers on a balance weighing platform, then shearing plant leaves, measuring the area of the leaves, clamping the leaves by the tweezers, vertically immersing the leaves in the liquid medicine for 10 seconds, then pulling the leaves out of the liquid level, vertically suspending the leaves, removing the leaves when no liquid drops flow on the leaves, placing the tweezers back into a beaker again, reading the balance, and calculating the retention R of the leaves according to the following formula: blade retention R (mg/cm) 2 ) =1000×w/S. Compared with the common method, the method can avoid that when the liquid drops on the leaf surface no longer flow, the leaf surface is clamped by the tweezers to leave the liquid medicine and move to the balance weighing table, and when the leaf surface is weighed again, the tweezers are used for sticking the liquid drops to the W 1 The weighing error is caused, so that the measurement result of the blade retention R is more accurate.
Description
Technical Field
The invention relates to a pesticide measuring method, in particular to a method for measuring retention of impregnating liquid on the surfaces of plant leaves.
Background
The pesticide measuring method is critical to the evaluation of pesticide effect, can effectively and accurately evaluate the adhesion of the pesticide on the blades, and can accurately calculate the usage amount of the pesticide in the field, thereby avoiding the waste and excessive use of the pesticide.
The general method for measuring the adhesion amount of the pesticide is to combine a micro weighing method and an immersion method, and the specific operation is as follows: after the liquid medicine is prepared, the slender pointed tweezers and the beaker loaded with the liquid medicine are placed outside a micrometer balance, and the balance is zeroed to be measured. Plant leaves were cut out to be flat and uniform, and the leaf area S (cm) was measured 2 ) Firstly, weighing the blade, and reading the balance reading W 0 (g) Then, the blade is clamped by tweezers and is vertically immersed into the liquid medicine for 10 seconds, the blade is quickly pulled out of the liquid level and vertically suspended, when no liquid drop flows on the blade (the blade and the tweezers are not separated from the space range right above the cup mouth in the whole process), the blade is moved to a balance weighing platform, the blade is weighed again, and a balance reading W is read 1 (g) And the forceps were replaced in the beaker. Blade retention RThe following formula is calculated: blade retention R (mg/cm) 2 )＝1000×(W 1 -W 0 ) and/S. When the method is used, when no liquid drops flow on the leaf surface, the leaf surface is clamped by forceps to leave the liquid medicine and move to a balance weighing platform, and when the leaf surface is weighed again, the liquid drops are adhered by the forceps to pair W 1 The resulting weighing error further makes the measurement result of the blade retention R inaccurate.
Some blades have too low adhesion, easily slip from the surface of the blade, inaccurate measurement, difficult accurate measurement and correction by adding adhesive liquid, but the existing adhesive liquid reacts with medicine components more, so that the measurement result is inaccurate and even loses the meaning of measurement.
Disclosure of Invention
The invention aims to provide a method for measuring retention of impregnating liquid on the surfaces of plant leaves.
The invention also aims to provide a correction measurement adhesive liquid.
A method for measuring retention of impregnating solution on the surface of a plant leaf, comprising the steps of:
(1) Preparing a liquid medicine, placing tweezers into a container for loading the liquid medicine after the liquid medicine to be measured is prepared, then placing the tweezers on a balance weighing platform together, and zeroing the balance to be measured;
(2) Plant leaves were cut out to be flat and uniform, and the leaf area S (cm) was measured 2 )；
(3) The blades are clamped by forceps and vertically immersed in the liquid medicine for 10s, then the blades are pulled out of the liquid level and vertically suspended, when no liquid drops flow on the blades, the blades are removed, the forceps are put back into a beaker again, the balance reading W (g) is read, and the blades and the forceps are not separated from the space range right above the cup mouth in the whole process;
(4) The blade retention R is calculated according to the following formula: blade retention R (mg/cm) 2 )＝1000×W/S。
The forceps are pointed forceps.
The adhesive liquid is added in the process of preparing the liquid medicine, and the addition amount is 0.1-3% of the mass of the original liquid medicine; the blade retention R (mg/cm) 2 )＝1000 Xcorrection factor XW/S.
The algorithm of the correction coefficient is as follows: 1- (adhesion mass of unit blade pure adhesion liquid-adhesion mass of unit blade pure water)/adhesion mass of unit blade pure adhesion liquid.
The adhesive liquid is one or more selected from polyalkoxysilane, hydroxypropyl cellulose, maleic anhydride calcium and sodium mixed salt, polylysine, carrageenan, ethyl acetate, methyl polysiloxane, propyl p-hydroxybenzoate and polyacrylate.
The liquid medicine is one or more selected from pesticide emulsion 1601, pesticide emulsion 700, OP-15, castor oil polyoxyethylene ether, magnesium aluminum silicate, sodium isopropyl naphthalene sulfonate, methyl naphthalene sulfonate formaldehyde polycondensate, hydroxymethyl cellulose sodium, laurocapram, isooctyl succinic acid sodium sulfonate, organosilicon 408, abamectin, tween 80, tristyrylphenol polyoxyethylene polyoxypropylene ether, tristyrylphenol formaldehyde resin polyoxyethylene ether, nonylphenol polyoxyethylene ether, castor oil polyoxyethylene ether, sodium isopropyl naphthalene sulfonate, methyl naphthalene sulfonate sodium formaldehyde polycondensate, hydroxymethyl cellulose sodium, laurocapram, isooctyl succinic acid sodium sulfonate, lambda-cyhalothrin, chlorantraniliprole, ethylene oxide-propylene oxide block copolymer, tristyrylphenol polyoxyethylene ether, polyoxyethylene polyoxypropylene block copolymer, high chlorine freeze-dried powder and maleated rosin.
Compared with the prior art, the invention has the following beneficial effects: compared with the common method, the method can avoid that when the liquid drops on the leaf surface no longer flow, the leaf surface is clamped by the tweezers to leave the liquid medicine and move to the balance weighing table, and when the leaf surface is weighed again, the tweezers are used for sticking the liquid drops to the W 1 The weighing error is caused, so that the measurement result of the blade retention R is more accurate. The use of the adhesive liquid ensures that the liquid medicine which is not easy to adhere to some blades can be accurately measured, and the sensitivity and the accuracy of measurement are increased.
Detailed Description
The following detailed description of specific embodiments of the invention is, but it should be understood that the invention is not limited to specific embodiments.
Example 1
A method for measuring retention of impregnating solution on the surface of a plant leaf, comprising the steps of:
(1) Preparing a liquid medicine, namely diluting an abamectin water solution with the mass fraction of 10.8% by 1000 times, placing pointed tweezers into a container for loading the liquid medicine after the liquid medicine to be tested is prepared, placing the pointed tweezers on a balance weighing platform together, and zeroing the balance to be tested;
(2) Cutting flat and consistent cucumber and rice leaf, and measuring leaf area S (cm) 2 )；
(3) The blades are clamped by forceps and vertically immersed in the liquid medicine for 10s, then the blades are pulled out of the liquid level and vertically suspended, when no liquid drops flow on the blades, the blades are removed, the pointed forceps are put back into the beaker again, the balance reading W (g) is read, and the blades and the pointed forceps are not separated from the space range right above the mouth of the beaker in the whole process;
(4) The blade retention R is calculated according to the following formula: blade retention R (mg/cm) 2 )＝1000×W/S。
The experiments in steps (2) - (4) were repeated 10 times, and at the same time, the blade retention was measured using the same liquid medicine using the conventional method as described in the background art, and the experimental results were shown in table 1.
TABLE 1
As can be seen from table 1, the data of the conventional group measurement has a relatively large fluctuation and a small average value of the values, and it is proved that the tweezers sticking of the droplets is an unavoidable phenomenon in the conventional measurement process.
Example 2
A method for measuring retention of impregnating solution on the surface of a plant leaf, comprising the steps of:
(1) Preparing liquid medicine, namely placing pointed tweezers into a container for loading the liquid medicine after the liquid medicine to be measured is prepared by 0.1% of organic silicon 408 in mass percent, placing the pointed tweezers on a balance weighing platform together, and zeroing the balance to be measured;
(2) Cutting flat and consistent cucumber and rice leaf, and measuring leaf area S (cm) 2 )；
(3) The blades are clamped by forceps and vertically immersed in the liquid medicine for 10s, then the blades are pulled out of the liquid level and vertically suspended, when no liquid drops flow on the blades, the blades are removed, the pointed forceps are put back into the beaker again, the balance reading W (g) is read, and the blades and the pointed forceps are not separated from the space range right above the mouth of the beaker in the whole process;
(4) The blade retention R is calculated according to the following formula: blade retention R (mg/cm) 2 )＝1000×W/S。
The experiments in steps (2) - (4) were repeated 10 times, and at the same time, the blade retention was measured using the same liquid medicine using the conventional method as described in the background art, and the experimental results were shown in table 2.
TABLE 2
As can be seen from table 2, the data of the conventional group measurement has a relatively large fluctuation and a small average value of the values, and it is proved that the tweezers tape droplet is an unavoidable phenomenon during the measurement.
Example 3
A method for measuring retention of impregnating solution on the surface of a plant leaf, comprising the steps of:
(1) Preparing a liquid medicine, namely 15% chlorantraniliprole, diluting by 1000 times, placing pointed tweezers into a container for loading the liquid medicine after the liquid medicine to be tested is prepared, then placing the pointed tweezers on a balance weighing platform together, and zeroing the balance to be tested;
(2) Cutting flat and consistent cucumber and rice leaf, and measuring leaf area S (cm) 2 )；
(3) The blades are clamped by forceps and vertically immersed in the liquid medicine for 10s, then the blades are pulled out of the liquid level and vertically suspended, when no liquid drops flow on the blades, the blades are removed, the pointed forceps are put back into the beaker again, the balance reading W (g) is read, and the blades and the pointed forceps are not separated from the space range right above the mouth of the beaker in the whole process;
(4) The blade retention R is calculated according to the following formula: blade retention R (mg/cm) 2 )＝1000×W/S。
The experiments in steps (2) - (4) were repeated 10 times, and at the same time, the blade retention was measured using the same liquid medicine using the conventional method as described in the background art, and the experimental results were shown in table 3.
TABLE 3 Table 3
As can be seen from table 3, the data of the conventional group measurement has a relatively large fluctuation and a small average value of the values, and it is proved that the tweezers tape droplet is an unavoidable phenomenon during the measurement.
Example 4
A method for measuring retention of impregnating solution on the surface of a plant leaf, comprising the steps of:
(1) Preparing a liquid medicine, namely, a 32.8% high-efficiency cyhalothrin aqueous solution, diluting by 1000 times, placing pointed tweezers into a container for loading the liquid medicine after the liquid medicine to be tested is prepared, then placing the liquid medicine together on a balance weighing platform, and zeroing the balance to be tested;
(2) Cutting flat and consistent cucumber and rice leaf, and measuring leaf area S (cm) 2 )；
(3) The blades are clamped by forceps and vertically immersed in the liquid medicine for 10s, then the blades are pulled out of the liquid level and vertically suspended, when no liquid drops flow on the blades, the blades are removed, the pointed forceps are put back into the beaker again, the balance reading W (g) is read, and the blades and the pointed forceps are not separated from the space range right above the mouth of the beaker in the whole process;
(4) The blade retention R is calculated according to the following formula: blade retention R (mg/cm) 2 )＝1000×W/S。
The experiments in steps (2) - (4) were repeated 10 times, and at the same time, the blade retention was measured using the same liquid medicine using the conventional method as described in the background art, and the experimental results were shown in table 4.
TABLE 4 Table 4
As can be seen from table 4, the data of the conventional group measurement has a relatively large fluctuation and a small average value of the values, and it is proved that the tweezers tape droplet is an unavoidable phenomenon during the measurement.
Example 5
A method for measuring retention of impregnating solution on the surface of a plant leaf, comprising the steps of:
(1) Preparing a liquid medicine, namely, 18% of a tristyrylphenol polyoxyethylene polyoxypropylene ether aqueous solution, adding carrageenan accounting for 2% of the total mass of the high-efficiency cyhalothrin aqueous solution, uniformly mixing, diluting by 1000 times, placing pointed tweezers into a container for loading the liquid medicine after the liquid medicine to be tested is prepared, and then placing the pointed tweezers on a balance weighing platform together, and zeroing a balance to be tested;
(2) Cutting off lotus and rice leaf with same flatness, and measuring leaf area S (cm) 2 )；
(3) The blades are clamped by forceps and vertically immersed in the liquid medicine for 10s, then the blades are pulled out of the liquid level and vertically suspended, when no liquid drops flow on the blades, the blades are removed, the pointed forceps are put back into the beaker again, the balance reading W (g) is read, and the blades and the pointed forceps are not separated from the space range right above the mouth of the beaker in the whole process;
(4) The blade retention R is calculated according to the following formula: blade retention R (mg/cm) 2 ) =1000×correction coefficient×w/S.
The algorithm of the correction coefficient is as follows: 1- (adhesion mass of unit blade pure adhesion liquid-adhesion mass of unit blade pure water)/adhesion mass of unit blade pure adhesion liquid. The correction coefficient of the lotus leaf to the medicament is measured to be 0.03 according to repeated tests, and the correction coefficient of the rice leaf to the medicament is measured to be 0.23.
The experiment of steps (2) - (4) was repeated 10 times, and at the same time, the same liquid medicine was used, carrageenan was not added, and the retention of leaf blade was measured, and the experimental results were shown in Table 5.
TABLE 5
From table 5, it can be seen that the data fluctuation of the measurement of the retention of the rice leaves of the non-added group is relatively large, the non-added group is not measured and calculated due to the too small difference of the values, the measurement data of the experimental group is relatively uniform, and the lotus leaf group is measurable, so that the adhesive liquid added in the embodiment can be used as a correction liquid, and the effect is good.
Example 6
A method for measuring retention of impregnating solution on the surface of a plant leaf, comprising the steps of:
(1) Preparing a liquid medicine, namely adding polylysine accounting for 2% of the total mass of the laurocapram aqueous solution into the laurocapram aqueous solution with the concentration of 12%, uniformly mixing, diluting by 1000 times, placing pointed tweezers into a container for loading the liquid medicine after the liquid medicine to be tested is prepared, and then placing the pointed tweezers on a balance weighing platform together, and zeroing the balance to be tested;
(2) Cutting off lotus and rice leaf with same flatness, and measuring leaf area S (cm) 2 )；
(3) The blades are clamped by forceps and vertically immersed in the liquid medicine for 10s, then the blades are pulled out of the liquid level and vertically suspended, when no liquid drops flow on the blades, the blades are removed, the pointed forceps are put back into the beaker again, the balance reading W (g) is read, and the blades and the pointed forceps are not separated from the space range right above the mouth of the beaker in the whole process;
(4) The blade retention R is calculated according to the following formula: blade retention R (mg/cm) 2 ) =1000×correction coefficient×w/S.
The algorithm of the correction coefficient is as follows: 1- (adhesion mass of unit blade pure adhesion liquid-adhesion mass of unit blade pure water)/adhesion mass of unit blade pure adhesion liquid. The correction coefficient of the lotus leaf to the medicament is 0.08, and the correction coefficient of the rice leaf to the medicament is 0.22 according to repeated test.
The experiments in steps (2) - (4) were repeated 10 times, and at the same time, the same liquid medicine was used, polylysine was not added, and the retention of leaf was measured, and the experimental results were shown in table 6.
TABLE 6
From table 6, it can be seen that the data fluctuation of measurement of the retention of the rice leaves of the non-added group is relatively large, the non-added group is not capable of measuring and calculating due to the small difference of the values, the measurement data of the experimental group is relatively uniform, and the lotus leaf group is measurable, so that the adhesive liquid added in the embodiment can be used as correction liquid, and the effect is good.
Example 7
A method for measuring retention of impregnating solution on the surface of a plant leaf, comprising the steps of:
(1) Preparing a liquid medicine, namely adding a 15% ethylene oxide-propylene oxide block copolymer aqueous solution into the liquid medicine, adding propyl parahydroxybenzoate accounting for 2% of the total mass of the laurocapram aqueous solution, uniformly mixing, diluting by 1000 times, placing pointed tweezers into a container for loading the liquid medicine after the liquid medicine to be tested is prepared, then placing the pointed tweezers on a balance weighing platform together, and zeroing the balance to be tested;
(2) Cutting off lotus and rice leaf with same flatness, and measuring leaf area S (cm) 2 )；
(3) The blades are clamped by forceps and vertically immersed in the liquid medicine for 10s, then the blades are pulled out of the liquid level and vertically suspended, when no liquid drops flow on the blades, the blades are removed, the pointed forceps are put back into the beaker again, the balance reading W (g) is read, and the blades and the pointed forceps are not separated from the space range right above the mouth of the beaker in the whole process;
(4) The blade retention R is calculated according to the following formula: blade retention R (mg/cm) 2 ) =1000×correction coefficient×w/S.
The algorithm of the correction coefficient is as follows: 1- (adhesion mass of unit blade pure adhesion liquid-adhesion mass of unit blade pure water)/adhesion mass of unit blade pure adhesion liquid. The correction coefficient of the lotus leaf to the medicament is measured to be 0.06 according to repeated tests, and the correction coefficient of the rice leaf to the medicament is measured to be 0.31.
The experiments in steps (2) - (4) were repeated 10 times, and at the same time, the same liquid medicine was used, propyl p-hydroxybenzoate was not added, and the retention of the leaf was measured, and the experimental results were shown in Table 7.
TABLE 7
From table 7, it can be seen that the data fluctuation of the measurement of the retention of the rice leaves of the non-added group is relatively large, the non-added group is not capable of measuring and calculating due to the small numerical difference, the measurement data of the experimental group is relatively uniform, and the lotus leaf group is measurable, so that the adhesive liquid propyl p-hydroxybenzoate added in the embodiment can be used as a correction liquid, and the effect is good.
The above disclosure is merely illustrative of specific embodiments of the present invention, but the present invention is not limited thereto, and any variations that can be considered by those skilled in the art should fall within the scope of the present invention.
Claims (2)
1. A method for measuring retention of impregnating solution on the surface of a plant leaf, comprising the steps of:
(1) Preparing a liquid medicine, adding an adhesive liquid with the mass of 0.1-3% of the liquid medicine after the liquid medicine to be measured is prepared, placing tweezers into a container for loading the liquid medicine, then placing the tweezers on a balance weighing platform together, and zeroing the balance to be measured;
(2) Plant leaves were cut out to be flat and uniform, and the leaf area S (cm) was measured 2 )；
(3) The blades are clamped by forceps and vertically immersed in the liquid medicine for 10s, then the blades are pulled out of the liquid level and vertically suspended, when no liquid drops flow on the blades, the blades are removed, the forceps are put back into a beaker again, the balance reading W (g) is read, and the blades and the forceps are not separated from the space range right above the cup mouth in the whole process;
(4) The blade retention R is calculated according to the following formula: blade retention R (mg/cm) 2 ) =1000×correction coefficient×w/S;
when the liquid medicine is tristyrylphenol polyoxyethylene polyoxypropylene ether, the adhesive liquid is carrageenan;
when the liquid medicine is laurocapram, the adhesive liquid is polylysine;
when the liquid medicine is an ethylene oxide-propylene oxide block copolymer, the adhesive liquid is propyl p-hydroxybenzoate.
2. The method of measuring the retention of an impregnating chemical on the surface of a plant leaf according to claim 1, wherein the tweezers are pointed tweezers.
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Denomination of invention: A method for determining the retention amount of impregnation solution on the surface of plant leaves Granted publication date: 20240319 Pledgee: Shenzhen hi tech investment small loan Co.,Ltd. Pledgor: Guangzhu Agricultural Group Co.,Ltd. Registration number: Y2024980021173 |