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Merck
모든 사진(1)

Key Documents

1.99068

Supelco

Buffer solution

di-sodium hydrogen phosphate/potassium dihydrogen phosphate, traceable to NIST, traceable to PTB, pH 6.86 (25 °C), Certipur®

동의어(들):

Buffer solution pH 4.0 (25 °C in H2O) (citric acid/sodium hydroxide/hydrogen chloride)

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About This Item

UNSPSC 코드:
41116107
NACRES:
NA.25

Agency

traceable to NIST
traceable to PTB

Quality Level

제품 라인

Certipur®

구성

di-sodium hydrogen phosphate/potassium dihydrogen phosphate

pH

6.86 (25 °C)

저장 온도

15-25°C

일반 설명

The potassium dihydrogen phosphate/di-sodium hydrogen phophate buffer solution is gravimetrically prepared at a registered calibration laboratory with high-quality reagents and water. Its pH value of 6.86 at 25°C is measured using a combined glass electrode following a 5-point calibration method. The measurement is made following DIN 19268 using reference buffer solutions compliant to DIN 19266, NIST, IUPAC, Ph. Eur, and USP. The buffer pH is temperature dependent and therefore a constant temperature must be maintained during its use.

Please visit ISO certificates and Site Quality Self-Assessments to access the current certificates of accreditation.

Download your certificate at http://www.sigma-aldrich.com to view certified values, including uncertainty and expiry date.

애플리케이션

The buffer is used as a standard to calibrate pH measuring instruments or pH electrodes and as a control to measure the pH of other solutions.

특징 및 장점

  • Measured and qualified at an ISO/IEC 17025 and ISO 17034 accredited laboratory
  • Traceable to secondary reference standard from NIST and primary certified reference standard from PTB
  • Available in a secure 500 mL plastic bottle to prevent contamination
  • Accompanied with a detailed and batch-specific certificate of analysis (CoA) for an effective audit
  • Product label follows the ISO Guide 31 and contains information about ordering number, article description, lot number, safety data, and expiry date
  • Packaging material subjected to comprehensive stability studies as per ISO Guide 35
  • An uncertainty of +/- 0.02 in the pH value at 25°C

법적 정보

CERTIPUR is a registered trademark of Merck KGaA, Darmstadt, Germany

Storage Class Code

12 - Non Combustible Liquids

WGK

nwg

Flash Point (°F)

Not applicable

Flash Point (°C)

Not applicable


시험 성적서(COA)

제품의 로트/배치 번호를 입력하여 시험 성적서(COA)을 검색하십시오. 로트 및 배치 번호는 제품 라벨에 있는 ‘로트’ 또는 ‘배치’라는 용어 뒤에서 찾을 수 있습니다.

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