Summary of pesticide dilution algorithm
2020-09-09 11:14:06
I. Dilution method Percentage concentration refers to the number of parts of medicine and fertilizer contained in 100 parts of medicine or liquid fertilizer powder, which is expressed by “%â€. For example, 2% urea means 2 kg of urea and 98 kg of water in 100 kg of urea solution.
Second, the multiple concentration refers to the addition of water for 1 part of the pesticide, commonly used to express. For example, prepare 700 times of 50% carbendazim, which is made by mixing 50 parts of carbendazim with 700 parts of water.
Third, the conversion method The conversion formula for converting the percentage concentration into ppm concentration is: the number of water added to 1 pesticide = the percentage of pesticide × 1000000 / the number of ppm to be prepared. For example, the content of 40% ethylene is 1 kg of a 2000 ppm solution, and the amount of ethylene added is 40% x 1000000/2000 = 200 parts.
4. Convert to multiple concentration. Divide the percentage by the number of ppm and shift the decimal point back by 4 bits to obtain the dilution factor. For example, 40% of ethephon is 1000 ppm, and when converted to a multiple concentration, 40 ÷ 1000 = 0.04, and the decimal point is shifted back to 4 places. That is 400 times.
V. Watering method When several pesticides are mixed, not every time one kind of medicine is added, water is added once, but all kinds of medicines are used: the same water is used to calculate the concentration. For example, 500 times of urea and 1000 times of methyl thiophanate are prepared by adding 2 parts of urea plus 1 part of methyl thiophanate plus 1000 parts of water. In addition, when watering, it should be formulated into mother liquor first, that is, first use a small amount of warm water to open the liquid, then add water to the desired concentration, fully dissolve, to improve the efficacy and prevent phytotoxicity.
How to properly dilute pesticides?
When using pesticide products, the size and configuration of the pesticide concentration is related to the actual effect and effect of the pesticide spraying. Therefore, diluting the pesticide becomes a key part when using the pesticide. How to properly dilute the pesticide?
First, the expression of the concentration of the drug 1, the percentage concentration: refers to 100 parts of pesticides, the proportion of the active ingredient, often expressed in (%).
2, parts per million: refers to the number of parts of the active ingredient in 1 million pesticides, the symbol is PPm (or micrograms / ml; milligrams / liter; grams / cubic meters, etc.).
3. Multiple method (ie dilution factor): refers to the multiple of water or other thinner (fine soil, particles, etc.) when the commercial pesticide is diluted. Dilute 100 times or less than 100 times, the calculation should be deducted 1 part of the original drug, such as 50 times diluted, that is, 1 part of the original drug plus 49 parts of thinner. Dilute 10O times or more, the calculation does not deduct the number of parts of the original drug, such as 600 times dilution, that is, 1 part of the original drug plus 600 parts of diluent.
Second, the conversion between the concentration representation 1, the conversion between the percentage concentration and the concentration of parts per million: ppm concentration (ppm) = 10000 × percentage concentration.
2, the conversion between the multiple method and the percentage concentration: percent concentration (%) = (original drug concentration / dilution factor) xl00.
Third, the calculation method when diluting pesticides 1, according to the calculation of active ingredients (1) to find the amount of diluent (water or filler, etc.): 1 diluted 100 times or less: thinner dosage = original drug weight x (original drug concentration - with Drug concentration) / concentration of the drug. 2 diluted more than 100 times: thinner dosage = original drug weight x original drug concentration / concentration of the drug.
(2) The amount of the drug to be used: the amount of the original drug = the weight of the drug to be dispensed x the concentration of the drug to be dispensed / the concentration of the original drug.
2, calculated by the multiple method (do not consider the content of active ingredients)
(1) Dilution 100 times or less: diluent dosage = original drug weight × dilution factor - original drug weight.
(2) Dilution more than 100 times: diluent dosage = original drug weight × dilution factor.
(3) The amount of the drug to be used: the amount of the original drug = the weight of the drug to be dispensed / the dilution factor (4) The dilution factor is: 1 The dilution ratio is determined by the concentration ratio: the dilution factor = the original drug concentration / the concentration of the drug to be dispensed. 2 by the weight ratio dilution factor: dilution factor = the weight of the drug / original drug weight.
Conversion of concentration by concentration and concentration: The concentration of the solution can be divided into three categories: mass concentration (such as mass percent concentration) and volume concentration (such as molar concentration, equivalent concentration) and volume concentration.
1. Percentage of mass concentration The concentration of a solution is expressed as a percentage by mass of the mass of the solute as a percentage of the mass of the whole solution, and is expressed by the symbol %. For example, 25% glucose injection refers to 25 grams of glucose in 100 injectables.
Percentage by mass (%) = solute mass / solution mass 100%
2, volume concentration (1) molar concentration: the concentration of the solution expressed in moles of solute contained in 1 liter of solution is called the molar concentration, expressed by the symbol mol, for example, 1 liter of concentrated sulfuric acid contains 18.4 moles of sulfuric acid, then the concentration It is 18.4 mol. Molar concentration (mol) = number of moles of solute / volume of solution (liter).
(2) Equivalent concentration (N): The concentration of the solution is expressed by the number of gram equivalents of the solute contained in 1 liter of the solution, and is represented by the symbol N. For example, 1 liter of concentrated hydrochloric acid contains 12.0 grams of equivalent hydrochloric acid (HCl) at a concentration of 12.0N. Equivalent concentration = gram equivalents of solute / solution volume (liters).
3. Mass-volume concentration The concentration expressed as the mass of the solute contained in a solution per unit volume (1 cubic meter or 1 liter) is called mass-volume concentration and is expressed by the symbol g/m3 or mg/L. For example, in a 1 liter chromium-containing wastewater containing hexavalent chromium having a mass of 2 mg, the hexavalent chromium concentration is 2 mg/L (mg/L).
Mass-volume concentration = mass of solute (gram or milligram) / volume of solution (m3 or liter).
4. Conversion formula of concentration unit 1) Equivalent concentration = 1000.d mass percent concentration / E
2) Mass percent concentration = equivalent concentration E/1000.d
3) molar concentration = 1000.d mass percent concentration / M
4) Mass percent concentration = mass-volume concentration (mg/L) / 104.d
5) mass-volume concentration (mg/L) = 104 mass percent concentration 5. ppm is the percentage of weight, ppm = mg / kg = mg / L
That is 1ppm=1ppm=1000ug/L
1ppb=1ug/L=0.001mg
Where: E - gram equivalent of solute; d - specific gravity of solution; M - molar mass of solute.
How much is 1PPM equal, how to convert? Secondly, PPM is a commonly used concentration unit in the world, because PPM is an English abbreviation, not the name of the calculation unit, that is, 1PPM=1x10-6, that is, 1PPM is one millionth of a concentration.
How to convert PPM concentration?
1G100% concentration of the drug diluted 1000KG water is 1PPM concentration, if the active ingredient of the drug concentration is 50%, then the 1G50% concentration of the drug diluted 500KG water is 1PPM concentration.
For example: How many times does it take to dilute water for 500PPM GA3 (100% content)?
100/500X10000=2000 times that is 1G diluted 2000G water is 500PPM concentration; can be substituted by conversion formula: pesticide active ingredient content (%) / liquid medicine effective concentration (PPM) X10000 = water dilution factor.
The above is the PPM conversion method. If you want to convert it, you can use the above formula to substitute. (Pesticide First Network)
Second, the multiple concentration refers to the addition of water for 1 part of the pesticide, commonly used to express. For example, prepare 700 times of 50% carbendazim, which is made by mixing 50 parts of carbendazim with 700 parts of water.
Third, the conversion method The conversion formula for converting the percentage concentration into ppm concentration is: the number of water added to 1 pesticide = the percentage of pesticide × 1000000 / the number of ppm to be prepared. For example, the content of 40% ethylene is 1 kg of a 2000 ppm solution, and the amount of ethylene added is 40% x 1000000/2000 = 200 parts.
4. Convert to multiple concentration. Divide the percentage by the number of ppm and shift the decimal point back by 4 bits to obtain the dilution factor. For example, 40% of ethephon is 1000 ppm, and when converted to a multiple concentration, 40 ÷ 1000 = 0.04, and the decimal point is shifted back to 4 places. That is 400 times.
V. Watering method When several pesticides are mixed, not every time one kind of medicine is added, water is added once, but all kinds of medicines are used: the same water is used to calculate the concentration. For example, 500 times of urea and 1000 times of methyl thiophanate are prepared by adding 2 parts of urea plus 1 part of methyl thiophanate plus 1000 parts of water. In addition, when watering, it should be formulated into mother liquor first, that is, first use a small amount of warm water to open the liquid, then add water to the desired concentration, fully dissolve, to improve the efficacy and prevent phytotoxicity.
How to properly dilute pesticides?
When using pesticide products, the size and configuration of the pesticide concentration is related to the actual effect and effect of the pesticide spraying. Therefore, diluting the pesticide becomes a key part when using the pesticide. How to properly dilute the pesticide?
First, the expression of the concentration of the drug 1, the percentage concentration: refers to 100 parts of pesticides, the proportion of the active ingredient, often expressed in (%).
2, parts per million: refers to the number of parts of the active ingredient in 1 million pesticides, the symbol is PPm (or micrograms / ml; milligrams / liter; grams / cubic meters, etc.).
3. Multiple method (ie dilution factor): refers to the multiple of water or other thinner (fine soil, particles, etc.) when the commercial pesticide is diluted. Dilute 100 times or less than 100 times, the calculation should be deducted 1 part of the original drug, such as 50 times diluted, that is, 1 part of the original drug plus 49 parts of thinner. Dilute 10O times or more, the calculation does not deduct the number of parts of the original drug, such as 600 times dilution, that is, 1 part of the original drug plus 600 parts of diluent.
Second, the conversion between the concentration representation 1, the conversion between the percentage concentration and the concentration of parts per million: ppm concentration (ppm) = 10000 × percentage concentration.
2, the conversion between the multiple method and the percentage concentration: percent concentration (%) = (original drug concentration / dilution factor) xl00.
Third, the calculation method when diluting pesticides 1, according to the calculation of active ingredients (1) to find the amount of diluent (water or filler, etc.): 1 diluted 100 times or less: thinner dosage = original drug weight x (original drug concentration - with Drug concentration) / concentration of the drug. 2 diluted more than 100 times: thinner dosage = original drug weight x original drug concentration / concentration of the drug.
(2) The amount of the drug to be used: the amount of the original drug = the weight of the drug to be dispensed x the concentration of the drug to be dispensed / the concentration of the original drug.
2, calculated by the multiple method (do not consider the content of active ingredients)
(1) Dilution 100 times or less: diluent dosage = original drug weight × dilution factor - original drug weight.
(2) Dilution more than 100 times: diluent dosage = original drug weight × dilution factor.
(3) The amount of the drug to be used: the amount of the original drug = the weight of the drug to be dispensed / the dilution factor (4) The dilution factor is: 1 The dilution ratio is determined by the concentration ratio: the dilution factor = the original drug concentration / the concentration of the drug to be dispensed. 2 by the weight ratio dilution factor: dilution factor = the weight of the drug / original drug weight.
Conversion of concentration by concentration and concentration: The concentration of the solution can be divided into three categories: mass concentration (such as mass percent concentration) and volume concentration (such as molar concentration, equivalent concentration) and volume concentration.
1. Percentage of mass concentration The concentration of a solution is expressed as a percentage by mass of the mass of the solute as a percentage of the mass of the whole solution, and is expressed by the symbol %. For example, 25% glucose injection refers to 25 grams of glucose in 100 injectables.
Percentage by mass (%) = solute mass / solution mass 100%
2, volume concentration (1) molar concentration: the concentration of the solution expressed in moles of solute contained in 1 liter of solution is called the molar concentration, expressed by the symbol mol, for example, 1 liter of concentrated sulfuric acid contains 18.4 moles of sulfuric acid, then the concentration It is 18.4 mol. Molar concentration (mol) = number of moles of solute / volume of solution (liter).
(2) Equivalent concentration (N): The concentration of the solution is expressed by the number of gram equivalents of the solute contained in 1 liter of the solution, and is represented by the symbol N. For example, 1 liter of concentrated hydrochloric acid contains 12.0 grams of equivalent hydrochloric acid (HCl) at a concentration of 12.0N. Equivalent concentration = gram equivalents of solute / solution volume (liters).
3. Mass-volume concentration The concentration expressed as the mass of the solute contained in a solution per unit volume (1 cubic meter or 1 liter) is called mass-volume concentration and is expressed by the symbol g/m3 or mg/L. For example, in a 1 liter chromium-containing wastewater containing hexavalent chromium having a mass of 2 mg, the hexavalent chromium concentration is 2 mg/L (mg/L).
Mass-volume concentration = mass of solute (gram or milligram) / volume of solution (m3 or liter).
4. Conversion formula of concentration unit 1) Equivalent concentration = 1000.d mass percent concentration / E
2) Mass percent concentration = equivalent concentration E/1000.d
3) molar concentration = 1000.d mass percent concentration / M
4) Mass percent concentration = mass-volume concentration (mg/L) / 104.d
5) mass-volume concentration (mg/L) = 104 mass percent concentration 5. ppm is the percentage of weight, ppm = mg / kg = mg / L
That is 1ppm=1ppm=1000ug/L
1ppb=1ug/L=0.001mg
Where: E - gram equivalent of solute; d - specific gravity of solution; M - molar mass of solute.
How much is 1PPM equal, how to convert? Secondly, PPM is a commonly used concentration unit in the world, because PPM is an English abbreviation, not the name of the calculation unit, that is, 1PPM=1x10-6, that is, 1PPM is one millionth of a concentration.
How to convert PPM concentration?
1G100% concentration of the drug diluted 1000KG water is 1PPM concentration, if the active ingredient of the drug concentration is 50%, then the 1G50% concentration of the drug diluted 500KG water is 1PPM concentration.
For example: How many times does it take to dilute water for 500PPM GA3 (100% content)?
100/500X10000=2000 times that is 1G diluted 2000G water is 500PPM concentration; can be substituted by conversion formula: pesticide active ingredient content (%) / liquid medicine effective concentration (PPM) X10000 = water dilution factor.
The above is the PPM conversion method. If you want to convert it, you can use the above formula to substitute. (Pesticide First Network)
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