计算溶液所需的质量、体积或浓度。
BioReagent,标曲法 级 ,适用于对基线干扰要求严格的色谱和分析工作流程。
2-8°C储存,避光。低温运输 。请查阅批次 COA 获取详细规格。
SDS、COA、产品数据表及规格说明书均可下载。可通过批号查询获取批次 COA。
在色谱分析、有机合成和交叉偶联反应领域已被 0 篇同行评审文献引用。
铵态氮可以被植物直接吸收利用,也可经过硝化微生物的作用转化为硝态氮,进而被植物或微生物同化为 有机氮化物。 本试剂盒检测原理是铵态氮在强碱介质中能够与次氯酸钠和苯酚反应,生成水溶性蓝色染料靛酚蓝,产物 在 625 nm 处有特征吸收峰,吸光值与铵态氮含量成正比。
组分表
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*请在实验前检查各组分的量。
*各组分在规格基础上额外提供 10%的量用于进行标准曲线制作或预实验。
自备仪器与试剂
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注意事项
1. 正式检测前,建议选择 2-3 个预期差异较大的样本进行预实验。
2. 建议实验者自行建立标准曲线以提高结果准确度。如未自行建立标准曲线,可参考结果展示部分的典型标 准曲线公式进行结果计算。
3. 生化检测试剂普遍具有刺激性、生物毒性等,为了您的安全和健康,请在实验全程做好生物安全防护,穿 戴实验服、口罩、手套、头套等安全护具,在通风橱、生物安全柜中进行实验。
4. 本产品仅供科学研究使用,不适用于临床诊断。
试剂准备
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标准品配制
使用 500 μmol/mL 标准品,按照下表所示,进一步稀释标准品。每次实验都要做一次标准品检测,制作 标曲;稀释后的标准品溶液不稳定,必须在 4 小时内使用。
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样本制备
注意:推荐使用新鲜样本,如果不立即进行实验,样本可在-80℃保存 1 个月。
植物组织:称取 0.1 g 植物组织,加入 1 mL 提取液室温匀浆,然后 10000 g,4℃离心 10 min,取上清待测。
实验步骤
1. 酶标仪准备:预热 30 min 以上,调节波长到 625 nm。
2. 检测体系配制:在 96 孔板中按照如下方式操作
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吸光度检测:充分混匀,立即测定 625 nm 处的吸光值,分别记为 A空白、A标准 和 A测定。
数据处理
1.计算 ΔA测定 = A测定 − A空白,ΔA标准 = A标准 − A空白。
2.标准曲线绘制:以标准品浓度为 y 轴,ΔA标准 为 x 轴,绘制标准曲线。将 ΔA测定 代入方程得到 y 值(μmol/mL)。
3.样本铵态氮含量计算: 铵态氮含量 (μg/g) = y × V提取 × 18 ÷ W × n = y × 18 ÷ W × n
V提取:加入 Extraction Buffer 体积,1 mL;18:NH4+ 摩尔质量,μg/μmol;W:样品质量,g;n:样本稀释倍数。
结果展示
典型标准曲线:

示例-1: 取 0.1 g 烟草茎,按照测定步骤操作,用 96 孔板进行检测。测得ΔA测定 = A测定 - A空白 =0.146-0.059=0.087, 代入标准曲线,计算 y=0.131。计算得:铵态氮含量(μg/g)=y×V 提取×18÷W×n=y×18÷W×n=23.58 μg/g。
FAQ
检测得到的样本ΔA测定 测定过高或者过低怎么办? 如果样本ΔA测定 >2.0,需用提取液适当进行稀释后,再进行实验,结果乘以稀释倍数,或减少提取 用样本量。如果样本的ΔA测定 <0.04,可适当提高样本量。
Ammonium nitrogen can be directly absorbed and utilized by plants, or it can be converted to nitrate nitrogen through the action of nitrifying microorganisms, which is then assimilated by plants or microorganisms into organic nitrogen compounds. The detection principle of this kit is that ammonium nitrogen reacts with sodium hypochlorite and phenol in a strong alkaline medium to form a water-soluble blue dye, indophenol blue. The product has a characteristic absorption peak at 625 nm, and the absorbance value is directly proportional to the ammonium nitrogen content.
Component Table
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*Please check the quantity of each component before the experiment.
*An additional 10% of each component is provided beyond the specified volume for standard curve preparation or preliminary experiments.
Reagents, consumables and Equipments not provided
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Precautions
1.Before formal testing, it is recommended to select 2–3 samples with expected large differences for preliminary experiments.
2..It is recommended that users establish their own standard curve to improve result accuracy. If a standard curve is not prepared independently, the typical standard curve formula provided in the Results section may be used for calculation.
3.Biochemical assay reagents are generally irritant and biologically toxic. For your safety and health, please take appropriate biosafety precautions throughout the experiment, including wearing lab coats, masks, gloves, head covers, and other protective equipment. Conduct experiments in a fume hood or biosafety cabinet.
4.This product is for scientific research use only and is not intended for clinical diagnosis.
Reagent Preparation
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Standard Preparation
Use the 500 µmol/mL standard to prepare further dilutions as shown in the table below. A standard curve must be prepared for each experiment. Diluted standard solutions are unstable and must be used within 4 hours.
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Sample Preparation
Note: Fresh samples are recommended. If not used immediately, samples can be stored at -80°C for up to 1 month.
Plant tissues: Weigh 0.1 g of plant tissue, add 1 mL of Extraction Buffer, and homogenize at room temperature. Centrifuge at 10,000 × g for 10 min at 4°C, then collect the supernatant for analysis.
Assay Procedure
1.Microplate reader preparation: Preheat for at least 30 min and set the wavelength to 625 nm.
2.Reaction system preparation: In a 96-well plate, proceed as follows:
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Absorbance measurement: Mix thoroughly and measure the absorbance at 625 nm immediately. Record as Ablank, Astandard, and Asample, respectively.
Data Processing
1.Calculate ΔAsample = Asample − Ablank, and ΔAstandard = Astandard − Ablank.
2.Standard curve construction: Plot the standard concentration on the y-axis against ΔAstandard on the x-axis. Substitute ΔAsample into the equation to obtain the y value (μmol/mL).
3.Calculation of ammonium nitrogen content in samples: Ammonium nitrogen content (μg/g) = y × Vextraction × 18 ÷ W × n = y × 18 ÷ W × n
Vextraction: Volume of Extraction Buffer added, 1 mL; 18: Molar mass of NH4+, μg/μmol; W: Sample weight, g; n: Sample dilution factor.
Results Display
Typical standard curve:

Example-1: Take 0.1 g of tobacco stem and follow the assay procedure using a 96-well plate. Measured ΔAsample = Asample − Ablank = 0.146 − 0.059 = 0.087. Substitute into the standard curve to obtain y = 0.131. Calculation: Ammonium nitrogen content (μg/g) = y × Vextraction × 18 ÷ W × n = y × 18 ÷ W × n = 23.58 μg/g.
FAQ
What if the measured ΔAsample is too high or too low?
If ΔAsample > 2.0, dilute the sample appropriately with Extraction Buffer and repeat the assay, then multiply the result by the dilution factor, or reduce the amount of sample used for extraction.
If ΔAsample < 0.04, increase the sample amount appropriately.
| 组分货号 | 组分名称 | 物理外观 | 48T | 96T | 储存 |
| P1527535A | 提取液 | 液体 | 70 mL | 70 mL×2 | 2-8℃ |
| P1527535B | 试剂 I | 固体 | 1 vial | 2 vials | 2-8℃,避光保存 |
| P1527535C | 试剂 II | 液体 | 6 mL | 12 mL | 2-8℃,避光保存 |
| P1527535D | 试剂 III | 液体 | 1.5 mL | 3 mL | 2-8℃ |
| P1527535E | 标准品 (500 µmol/mL) | 液体 | 1 mL | 1 mL | 2-8℃ |