Reference materials for organic matter analysis in organic-inorganic compound fertilizers

Reference materials for organic matter analysis in organic-inorganic compound fertilizersThis standard substance is applicable toorganic-Inorganic compound fertilizermiddleorganic mattercontentanalysisThe research and monitoring of methods are of great significance and can be used for precision evaluation in analysis and testing related to agriculture, geology, environmental protection, and other fieldspersonnel evaluationAnd quality control during the process.

Onesample preparation

Selection of this standard substanceordinaryoforganic-Inorganic compound fertilizerAs a matrix, impurities are removed during the preparation processgrinding、mixedBy using special homogenization methods,then againAfter dryingofPackaged inglassin the bottle, throughCo⁶⁰radiation sterilizationafterStore away from light.

IICharacteristic values and uncertainties

The uncertainty assessment of the characteristic values of this standard substance mainly considersThe uncertainty components introduced by the joint calibration of multiple laboratories, as well as the uncertainty components introduced by the uniformity and stability tests of standard materials.

Explanation: The chloride ion content is approximately0.282%Not used as a characteristic value.

IIIUniformity testing and stability assessment

pressphotocountryreference materialrelatedtechnical specificationsofRequirement: Randomly select standard substance samples after packaging,reference standardGB/T18877-2020《organic-Inorganic compound fertilizer》(including)1Number modification form)6.4measureTest method ，adoptPotassium dichromate volumetric method and deducting chloride ion interference,Conduct uniformity and stability tests, with a minimum sampling size of0.1gThe results indicate that the series of standard materials have good uniformity and stability. The validity period of this standard substance is from the date of self determination3Year. The research and development unit will continue to track and test the stability of the standard substance. If any changes in the value are found within the validity period, the user will be notified in a timely manner.

4Traceability and value determination methods

This standard substance is assigned values using a joint calibration method by multiple laboratories. The fixed value method isPotassium dichromate capacitylaw, and deduct chloride ion interference.By using measurement methods and instruments that meet the requirements of metrological characteristics, the traceability of characteristic values of standard substances is ensured.

five. Packaging, Storage, and Use

Reference materials for organic matter analysis in organic-inorganic compound fertilizersThis standard substance is based onglassBottle packaging, each bottle40gStore in a dark, clean, and room temperature place; Strictly prevent contamination during opening and use. The minimum sampling size is specified as0.1gPlease do not use below this sampling amount.