国产日产欧美精品-亚洲国产综合久久精品-色综合色国产热无码一-亚洲欧美日本国产,免费观看一区二区三区_在线观看片A免费不卡观看_亚洲а∨天堂久久精品_99久无码中文字幕一本久道

Each bottle （500 mL） is supplied with a COFRAC Verification Certificate and Certificate of Conformity and Traceability drawn up according to ISO31.

• Total Control of the traceability chain and calculated uncertainties
• Direct traceability to primary standards and the reference method
• The competence and integrity of a laboratory internationally recognized to be accredited for the measurement of pH and conductivity reference materials

  Total Control of the traceability chain and calculated uncertainties

  Direct traceability to primary standards and the reference method

  The competence and integrity of a laboratory internationally recognized to be accredited for the measurement of pH and conductivity reference materials

  Specifications

  Concentration:4.005 ± 0.010 pH bij 25 °C

  Description :traceable to IUPAC pH scale and NIST

  Footnote:¹Behalve pH 7,000 door ons geformuleerd in overeenstemming met NIST-, IUPAC- en DIN19266-specificaties van pH 6,865 en pH 7,413 ²Dansk Fundamental Metrologi A/S is geaccrediteerd voor pH-metingen door het Deense accrediteringsorgaan Danske Akkrediterings- og Metrologifond （DANAK） （nr. 255）

  NIST Traceable:yes

  Parameter:pH

  Platform :Buffer

  Quantity:500 mL