Standard (DIN/NIST) buffer solutions

PTB/NIST traceable standard buffer solutions (work reference buffer solutions) for precision applications - safe use

Buffer solutions according DIN 19266-01: 2000 are the most widely distributed buffer solutions. They are the so-called work reference buffer solutions, and, because of their composition being listed in the standard, they are the best known buffer solutions. Standard buffering solutions by WTW are traceably certified to PTB/NIST for safe use.

The buffers pH 1.679, pH 4.006, pH 6.865, pH 9.180 and pH 12,47 (PL 2, PL 4, PL 7, PL 9 and PL 12) are available in 250 ml bottles.

They are accurate to ± 0.02 pH at 25 °C, (excepetion buffer 12.47: ± 0.05 pH). Also, every bottle is labeled with its own lot number and expiration date.
For particular accurate measuerements buffers pH 4.01, pH 6.87 and pH 9.18 are also available in glass ampoules with an accuracy of ± 0,01 pH at 25 °C.

PL 2 (109000):

• Standard (DIN/NIST) buffer solution, 1 bottle with 250 ml: pH 1,679 /1,68

PL 4 (109110):

• Standard (DIN/NIST) buffer solution, 1 bottle with 250 ml: pH 4,006 /4,01

PL 7 (109120):

• Standard (DIN/NIST) buffer solution, 1 bottle with 250 ml: pH 6,865 /6,87

PL 9 (109130):

• Standard (DIN/NIST) buffer solution, 1 bottle with 250 ml: pH 9,180 /9,18

PL 12 (109400):

• Standard (DIN/NIST) buffer solution for special applications, 1 bottle with 250 ml: pH 12,47

STAPL-4/7/9 (109020):

• Standard (DIN/NIST) buffer solution, package with 10 x 6 glass ampoules with each 20 ml: pH 4,01, pH 6,87, pH 9,18 (accuracy ± 0,01 pH at 25 °C)

QSC Kit (109830):

• Initial calibration set for IDS pH sensors. Bundle with three ampoules pH 4,01; pH 6,86; pH 9,18.

SORT/K (109415):

• Calibration and maintenance set standard (DIN/NIST) buffer solutions, 3 bottles with each 250 ml: pH 4,006 - 6,865 - 9,180, 1 bottle with 250 ml pepsin cleaning solution, 1 bottle with 250 ml KCl solution 3 mol/l