Organic fertilizer - chicken manure

1、 Overview: This standard substance is an organic fertilizer, and the sample properties are detailed in Table 1. After screening, impurity removal, drying, rough grinding, and fine crushing, the samples are sieved and mixed evenly before being packaged in high-density PET bottles, ® Co sterilization, store in a cool and dry place.

2、 Expected use

This standard substance can provide corresponding support for method validation, quality control, capacity comparison, and other aspects of organic fertilizer sample analysis and testing, and can also be used for analyzing similar substances.

3、 Uniformity and stability

The sample has good uniformity and stability. Randomly select 30 packaging units and conduct 2 repeated measurements from different parts of the bottle sample. The analysis methods mainly include ICP-MS, AFS, etc. After inspection, the sample is uniform and good. The recommended minimum sampling amount is 0.5g.

4、 Fixed value testing method

This series of standard materials adopts a calibration method in collaboration with multiple laboratories, and the analysis methods include different principle methods such as ICP-MS, ICP-OES, AFS, etc.

5、 Measurement traceability

1. The measuring instruments used have been verified or calibrated, and the calibration solutions are all certified national standard substances.

2. The selected measurement method can meet the metrological requirements of fixed value work.

3. Using certified reference materials of the same type to monitor measurement procedures to ensure accurate and reliable analysis results.

6、 Standard value and uncertainty

This standard substance is determined using industry standards and mature and reliable analytical methods, and the arithmetic mean is taken as the standard value. The uncertainty is the extended uncertainty, with a factor of k=2. The summary of measurement values is shown in Table 2.

7、 Transportation and storage conditions

1. This standard substance is packaged in PET plastic bottles with a packaging specification of 30g/bottle. When distributed to users, samples can be transported by regular express delivery.

2. The sample should be stored in a cool, dry, and well ventilated place.

8、 Instructions for use

1. This standard substance sample should be stored in a cool and dry condition before opening. After opening, it should be immediately sealed tightly and stored in a dryer to prevent moisture.

2. Use clean tools to take standard substance samples, and do not pour them back.

3. This standard substance sample can be used directly without further processing such as crushing, grinding, drying, etc.

4. This standard substance is for laboratory use only.

9、 Cooperative fixed value unit

Environmental Quality Inspection and Testing Center of the Ministry of Agriculture and Rural Affairs (Tianjin), Sichuan Provincial Farmland Quality and Fertilizer Work Station, Jilin Provincial Soil and Fertilizer Station, Institute of Agricultural Resources and Agricultural Zoning of the Chinese Academy of Agricultural Sciences/National Fertilizer Quality Inspection and Testing Center (Beijing), Hubei Academy of Agricultural Sciences Quality Standards Institute, Heilongjiang Academy of Agricultural Sciences Quality Standards Institute, Zhengzhou Fruit Tree Institute of the Chinese Academy of Agricultural Sciences, Hunan Provincial Farmland and Agricultural Environmental Ecology Research Institute, Guangdong Academy of Agricultural Sciences Agricultural Quality Standards and Monitoring Technology Research Institute.