Inorganic Ion Standards

The boric acid/potassium chloride/sodium hydroxide certified buffer solution is gravimetrically prepared using high-quality reagents as per DIN EN ISO/IEC 17025. Its pH value of 9.

The boric acid/potassium chloride/sodium hydroxide certified buffer solution is gravimetrically prepared using high-quality reagents as per DIN EN ISO/IEC 17025. Its pH value of 9.

General description The boric acid/sodium hydroxide/potassium chloride buffer solution is gravimetrically prepared at a registered calibration laboratory with high-quality reagents and water. Its pH value of 11.

This certified reference material (CRM) is produced and certified in accordance with ISO/IEC 17025 and ISO 17034 .This CRM is traceable to SI unit kg and measured against primary material from an NMI, e.

Calcium carbonate.

The pH buffer standards are measured and qualified using differential potentiometry with two platinum hydrogen electrodes. This method allows the comparison of the reference buffers to the corresponding primary reference materials by PTB (Physical

This certified reference material (CRM) is produced in accordance with ISO 17034 and characterized in accordance with ISO/IEC 17025. This CRM is traceable to SI unit kg and measured against primary material from a National Metrology Institute

This certified reference material (CRM) is produced in accordance with ISO 17034 and characterized in accordance with ISO/IEC 17025. This CRM is traceable to SI unit kg and measured against primary material from a National Metrology Institute

Calcium nitrate tetrahydrate.

Analysis Note Assay (complexometric): &#8805 98.0 % pH-value (5&#8199% water): 4.

This certified reference material (CRM) is produced and certified in accordance with ISO/IEC 17025 and ISO 17034 .This CRM is traceable to SI unit kg and measured against primary material from an NMI, e.

This Certified Reference Material (CRM) is produced and certified in accordance with ISO 1703 4 and ISO/IEC 17025 . All information regarding the use of this CRM can be found on the certificate of analysis.