Standard substance for organic matter analysis in water-soluble fertilizers

Standard substance for organic matter analysis in water-soluble fertilizersThis standard substance is applicable toWater-soluble 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 substanceordinaryofwater-soluble fertilizerAs a matrix, during the preparation processdry、grinding、screening、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.

IIIUniformity testing and stability assessment

pressphotocountryreference materialrelatedtechnical specificationsofRequirement: Randomly select standard substance samples after packaging,reference standardNY/T1976-2010Test method for determination of organic matter content in water-soluble fertilizers ，adoptpotassium dichromate-Sulfuric acid oxidation sulfuric acid sub titrationThe law,Conduct uniformity and stability tests, with a minimum sampling size of1.0gThe 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.Among them, chloride ions are classified according toGB/T15063-2020The method is tested, and its chloride ion is approximately0.432%.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 dichromatecapacitylaw.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

Standard substance for organic matter analysis in water-soluble fertilizersThis standard substance is based onglassBottle packaging, each bottle70gStore in a dark, clean, and room temperature place; Strictly prevent contamination during opening and use. The minimum sampling size is specified as0.5gPlease do not use below this sampling amount.