Soil pH and acidity standard reference material ERM-510101

Product introduction provided by Wuhan Zhongchang Guoyan Standard Material:ERM-2018-2022Soil pH and acidity standard reference material ERM-510101

Standard value:8.25

Specification: 50g

This environmental standard sample is produced and valued in accordance with the relevant requirements of GB/T15000 series "Guidelines for the Work of Standard Samples" (equivalent to ISO guidelines 31, 34, and 35) and GB/T27025 (equivalent to ISO/IEC 17025), mainly used for method evaluation, quality control, capability verification, and technical arbitration in environmental monitoring and related analytical testing.

This environmental standard sample can be stored at room temperature or refrigerated, and compression and collision should be avoided during transportation. After opening the ampoule, it should be used up in one go, and the expiration date refers to the last date when the ampoule can be used under specified storage conditions before opening.

This environmental standard sample should be diluted according to the following procedure before use: carefully open the ampoule before use, use a 10mL dry and clean pipette to accurately measure 10mL of concentrated sample from the ampoule into a 250mL volumetric flask, dilute with pure water to the mark, mix well, and use immediately.

This environmental standard sample was prepared in a super clean laboratory and sealed in 20mL ampoules using water quality standard sample packaging equipment. It passed the uniformity test. The National Environmental Standard Sample Collaborative Measurement Experimental Network used the same procedure as described above to dilute the concentrated sample, and conducted the measurement using both dilution and inoculation methods. After statistical testing and expert experience judgment to eliminate outliers, the total mean was determined to evaluate the standard value, and the inter laboratory reproducibility standard deviation was used to evaluate the uncertainty.

The scales, glassware, and analytical instruments used for the preparation and determination of this environmental standard sample have been periodically calibrated by the metrological calibration department and are within their validity period.

Wuhan Zhongchang Guoyan provides a series of related products, including standard samples such as GSB 0740072022 and GSB 0740082022 Soil Brown Soil pH. The release and application of these environmental standard samples can further enhance China's ecological environment standard sample system and provide effective quality control measures for the implementation of relevant quality standards and emission standards.

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★The above is【ERM-2018-2022Soil pH and acidity standard reference material ERM-510101】Detailed introduction. For more detailed product information such as product prices, product images, product certificates, manufacturers, brands, quotations, discounts, etc., please contactWuhan Zhongchang Guoyan Biao Technology Co., Ltdcontact