TH23255B - Soil NPK content determination kit - Google Patents

Abstract

DC60 (23/09/47) Soil Nitrogen, Phosphorus, Potassium Determination Kit is a principle-based probe. Chemical reactions of reagents specific to nitrogen, phosphorus, potassium, and their color change after completion of the reaction. Which when compared with the standard color bar Specifically, it is able to accurately and quickly determine the amount of nitrogen, phosphorus, potassium available in the soil.The fabricated probe has three key components: 1) equipment necessary for the preparation of soil samples such as test tubes, filter papers, bottles. 2) Different reagents including 1 soil extraction reagent, 4 reagents for nitrogen determination (both in ammonium and nitrate), reagents for measurement. 2 types of phosphorus and 2 potassium reagents and 3) 5 standard color bands for color comparison, nitrogen, phosphorus and potassium content determination solutions. The method of using the test consists of the preparation of soil samples by volume. And how to set And the solution extracted from the soil Let's add the reagent for determining the nitrogen, phosphorus and potassium content of each type according to the specified method and time. Will change the color of the reagent in that solution. Due to the chemical reaction between the reagents used with nitrogen, phosphorus and potassium extracted from the soil, when compared with the standardized color bar created. It can accurately and quickly quantify the nitrogen, phosphorus and potassium contained in the soil. Soil nitrogen, phosphorus, potassium content is a principle-based test. Chemical reaction of reagents specific to nitrogen, phosphorus, potassium, and discoloration of the reagents after completion of the reaction. Which when compared with the standard color bar Specifically, it is able to accurately and quickly determine the amount of nitrogen, phosphorus, potassium available in the soil.The fabricated probe has three key components: 1) equipment necessary for the preparation of soil samples such as test tubes, filter papers, bottles. 2) Different reagents including 1 soil extraction reagent, 4 reagents for nitrogen determination (both in ammonium and nitrate), reagents for measurement. 2 types of phosphorus and 2 potassium reagents and 3) 5 standard color bands for color comparison, nitrogen, phosphorus and potassium content determination solutions. The method of using the test consists of the preparation of soil samples by volume. And how to set And the solution extracted from the soil Let's add the reagent for determining the nitrogen, phosphorus and potassium content of each type according to the specified method and time. Will change the color of the reagent in that solution. Due to the chemical reaction between the reagents used with nitrogen, phosphorus and potassium extracted from the soil when compared to the standard color bar created. It can accurately and quickly quantify the nitrogen, phosphorus and potassium contained in the soil.

Claims (2)

1. Soil NPK determination kit consists of 1.1 reagents for soil extraction and 9 formulas of NPK, classified by numbers as follows: - No.1 is soil extractor which is a mixture of 2 types of acids: 0.05 nors. Hydrochloric acid (0.05 N HCl) and 0.0025 sulfuric acid (0.0025 N H2SO4) - No.2 is an ammonium coloring powder consisting of (1) sodium salicylate ( Sodium salicylate 8.5 g. (2) Sodium nitroprusside (Sodium nitroprusside) 0.06 g - No.3 is an ammonium reagent consisting of (1) sodium hydroxide (Sodium hydroxide) 4 g dissolved in 50 ml of water. . (2) Sodium hypochlorite (Sodium hypochlorite) 2% Cl2 50 ml. - No. 4 is a nitrate coloring solution containing 50 g of citric acid (Citric acid) dissolved in 100 ml of water - No.5 as a powder. Coloring in the trates contains: (1) 4 g of sulfanilic acid (2) alpha-naphthylamine. (Alpha-Naphthylamine) 0.5 g. (3) Manganse sulfate 10 g. (4) Zn-powder 0.5 g. All chemical powder is ground and mixed into a homogeneous solution - No. 6 is a reagent. Phosphorus coloring, consisting of (1) Ammonium molybdate 12 g. (2) Antimony potassiumtartate 0.2908 g. (3) 5 Sulfuric acid (5N Sulfuric). acid) 2,000 ml. Dissolve all chemicals according to (1) and (2) in solution (3) - No.7 is phosphorus coloring powder consisting of L (+) ascorbic acid (L (+) ) Ascorbic adid) pure - No. 8 is a potassium colorant containing ethanol absolute GR (Ethanol absolute GR) - No. 9 is a potassium colorant containing 20% sodium cobalt nitrite ( Sodium cobaltinitrite) contains 0.6 g of chemical powder, when used, add 3 ml of distilled water, shake it to dissolve completely.1.2 5 types of standard color strips produced by using standard primer used in printing plants is yellow (Y ) Blue (C) and red (M) are printed on white paper by printing one color at a time, and the color intensity is determined as a percentage of the The number of colored dots on the white paper, for example, 10% yellow means using the yellow primary. Printed on white paper with 10% of the total number of dots on white paper, the five standard color swatches are produced as follows: Type 1 standard color swatch is the standard color swatch for measuring N content in type 1 ammonium form. In case the solution produces a bluish tint It consists of 5 levels of ammonium N-content color from very low to very high with 5 color bands, ie 1 very low (VL) band, formed by 10% yellow (Y) primary print, 10% intensity tab. Low (L) is formed by mixing two primary colors: yellow (Y), 30% intensity, blue (C), 70% intensity, stripe 3, medium (M), formed by mixing two primary colors, red (M.). ) Intensity 10% Blue (C) 100% Intensity 4 High (H) is formed by mixing two primary colors: Red (M), 30% Intensity Blue (C), 100% Intensity. VH (VH) is formed by mixing two primary colors: red (M), 50% intensity, blue (C), 100% intensity. Type 2 standard color band is the standard color bar for measuring N in ammonium form. that The solution gives a green tint. It consists of 5 levels of ammonium N-content from very low to very high with 5 color bands, ie 1 very low (VL), formed by yellow primary (Y), 50% intensity, low second bar ( L) is formed by mixing two primary colors: yellow (Y), 70% intensity, blue (C), 70% intensity, medium bar 3 (M), formed by mixing 3 primary colors: yellow (Y). Dark 60% Red (M) 20% Intensity Blue (C) 80% Intensity 4 High band (H) is formed by mixing 3 primary colors: Yellow (Y), 60% intensity, Red (M). 30% Intensity Blue (C) 100% Intensity 5 Band Very High (VH) is formed by mixing 3 primary colors: Yellow (Y), 40% Intensity Red (M), 20% Intensity Blue (C). ) Intensity 100% The standard type 3 color bar is the standard color bar for measuring N content in nitrate form.It consists of 5 levels of color indicating N in the form of nitrate from none to high by using the number swatch. 5 bars: 1st bar, none (O) white, 2nd bar, very low (VL), caused by red primary (M), 40% intensity, low third bar (L), caused by red primary (M), 60 intensity. % 4th tab. Medium (M), caused by primary red (M), 80% intensity, high fifth band (H), caused by primary red Dong (M) 100% Intensity The fourth standard color band is the standard color palette for phosphorus determination, consisting of 5 levels of phosphorus coloring from very low to very high. By using 5 color bars, namely 1st tab, very low (VL) white, low second bar (L), formed by mixing of two primary colors, red (M), 10% intensity, blue (C) intensity. 30% 3rd medium (M) is a mixture of 2 primary colors: red (M), 20% intensity, blue (C), 50% intensity. 4 high (H) color bands are formed by mixing of primary colors. 2 colors are red (M), 30% intensity, blue (C), 70% intensity, the fifth band is very high (VH), formed by mixing of 3 primary colors: yellow (Y), 20% intensity, red ( M) 50% Intensity Blue (C) 80% Intensity The fifth standard color bar is the standard color bar for measuring potassium content. It consists of 3 levels of color indicating potassium levels from low to high by using 3 color bands: 1 low (L), formed by mixing two primary colors: yellow (Y), 80% intensity, red (M). Intensity 70%, 2nd bar, Medium (M), formed by mixing two primary colors: yellow (Y), 60% intensity, red (M), 40% intensity, high 3rd bar (H). Two colors: Yellow (Y), 60% intensity, Red (M), 30% intensity. 2. The method for determining the N P K content in soil has 2 steps as follows: Step 1 Extract or dissolve nutrients. Will need to walk to ground thoroughly, measuring 4 grams of soil in a plastic bottle And add the extract No. 1 into the volume of 20 ml by using a measuring cylinder Shake for the soil to do React to the extract for 5 minutes, filter the soil solution using the prepared filter paper. Bring the filterable To check the NPK content in the soil following step 2, step 2, the determination of the NPK nutrient content in the soil, the ammonium content check. Take 1 straw (2.5 ml.) Of filtered water into a glass tube. Add 0.02 g of No. 2 powder, add 5 drops of No. 3 coloring solution, cover the tube and shake well, leave it for 5 minutes and read the ammonium readings compared to the standard type 1 or 2 by Absorbed from the resulting color, if the blue tint was compared with the standard type 1 color bar, if the resulting color was green tone, compared with the standard type 2 color bar. Take 1 straw (2.5 ml.) Of filtered water into a glass tube. Add 0.5 ml of coloring solution No. 4, add 0.01 g of No. 5 powder, cover the glass tube, shake well, leave for 5 minutes and read the amount of nitrate. In comparison with the standard type 3 color bar, the detection of phosphorus content. Take 1 straw (2.5 ml.) Of filtered water into a glass tube. Add 0.5 ml of coloring solution No. 6 and 0.01 g of powder No. 7, cover the tube and shake well, leave it for 5 minutes and read the phosphorus content. By comparing the resulting color with the fourth standard color swatch, potassium content testing. Suck 2 ml of no.8 colored solution into a glass tube and add 2 drops of no.9 solution and suck 0.8 ml of soil extracted water and mix well by shaking the test tube and leave it for a full reaction for 5 minutes. Shake the test tube to mix well one more time. Immediately compare the color with the fifth standard color swatch