pH Paper and Buffers

Thermo Scientific™ Orion™ pH Buffer Bottles

Perform accurate, reproducible pH calibrations with color-coded Thermo Scientific™ Orion™ pH Buffer Bottles. PH 9.18 BUFFER 475ML

SI Analytics™ Standard Buffer Solution pH 4, 7 and 10.01

BUFFER FIOLAX L4698

WTW™ TEP 10 Model Buffer Solution pH 10

PH BUFFER PH10 1LFlasche)

Mettler Toledo™ Technical pH Buffer Solutions

Provides a reliable all-around pH buffer. Mettler Toledo™ Technical pH Buffer Solution are specified to two decimal places and are traceable to NIST standards. Color-coded solution comes in a handy 250mL plastic bottle with no-fuss labels. 250 ML TECHNICAL BUFFER, PH7.00 250ML

WTW™ TEP 10 Trace Model Buffer Solution pH 10.1

WTW ph 10 Buffer TEP101 x WTW ph 10 Buffer TEP10

Honeywell Fluka™ Buffer concentrate, pH 1.00, hydrochloric acid / potassium chloride, Honeywell™

for 500 ml buffer solution, hydrochloric acid / potassium chloride 85ML Buffer concentrate pH 1.00 for 500 ml buffersolution, hydrochloric acid / potassium chloride

SI Analytics™ Standard Buffer Solution pH 4

pH buffer sol. technical pH 4.00 Duran bottle 250

Alfa Aesar™ Sodium citrate, 0.5M buffer soln., pH 6.0

500ML Sodium citrate, 0.5M buffer soln., pH 6.0 500ml

Honeywell Fluka™ Buffer solution pH 3.0 (20°C), Citric acid / sodium hydroxide / sodium chloride solution, with fungicide, traceable to SRM from NIST and PTB, Honeywell Fluka™

Citric acid / sodium hydroxide / sodium chloride solution, with fungicide, traceable to SRM from NIST and PTB X6 Buffer solution pH 3.0 (20oC) citric acid / sodium hydroxide / sodium chloride solution, 1L

GE Healthcare Whatman™ pH Indicator Papers, CF Strips

Provides an extremely clear and accurate visual pH value using four different segments of dye-impregnated indicator papers. Whatman™ pH Indicator Papers, CF Strips use dyes that are chemically bonded to the paper and cannot be leached into solution. X100 PH STRIPS PH4,5 - 10

Hanna™ Instruments pH Buffer Solutions

X1 230ml, pH 7.01 Buffer Solution

Hanna Instruments™ TISAB solution (for fluoride)

TISAB SOLUTION 500ML (FLUORIDE)

GE Healthcare Whatman™ pH Indicators Integral Comparison Strips

Used for rapid determination of pH values X200 PH INDIC 1.0-12.0 11X100MM

SI Analytics™ Standard Buffer Solution pH 1.68

BOX 60 AMPOULES BUFFER PH 1,6820 ml

WTW™ STP 7 Model Buffer Solution pH 7

50ML BUFFER PH7

Hamilton™ DuraCal™ 4.01 Value pH Buffer

500ML DURACAL pH 4.01

WTW™ TPL 10 Trace Model Buffer Solution pH 10.1

TPL 10 TRACE

Honeywell Fluka™ Buffer solution pH 10.0 (20°C), Borax / sodium hydroxide, Honeywell Fluka™

CAS: 1336-21-6 Molecular Formula: H5NO Molecular Weight (g/mol): 35.046 InChI Key: VHUUQVKOLVNVRT-UHFFFAOYSA-N PubChem CID: 14923 ChEBI: CHEBI:18219 IUPAC Name: azanium;hydroxide SMILES: [NH4+].[OH-] X6 Buffer solution pH 10.0 (20oC) borax / sodium hydroxide 1L

Mettler Toledo™ Buffer Solution Pack pH 4.01, 7.00, 9.21

BUFFER SOL PH=401/7,00/921 20ML

Alfa Aesar™ Sodium borate, 0.5M buffer soln., pH 9.0

CAS: 1330-43-4 MDL Number: MFCD00081185 250ML Sodium borate, 0.5M buffer soln., pH 9.0 250ml

Buffer solution pH 9.2, Borate buffer, traceable to NIST, ready to use, ACROS Organics™

1LT Buffer solution pH 9.2, Borate buffer, traceable to NIST, ready to use

Lovibond™ PD250 Reagent Dispenser Refill: DPD Free Chlorine and Total Chlorine

For use with SC450 Chlorine and pH colorimeter, MC500 colorimeter and SP600 spectrophotometer 2 x 250 TESTS VARIO POWDER FREE&TOTAL CHLORINE

Thermo Scientific™ Orion™ ROSS™ All-in-One™ pH Buffer Kit

Maintain pH electrodes more effectively with Thermo Scientific™ Orion™ ROSS™ All-in-One™ pH Buffer Kits. ALL-IN-ONE ROSS PH BUFFER KIT,, 475ML EACH OF4.01, 7.00, 10.01 buffers, ROSS pH electrode

Thermo Scientific™ Orion™ Standard All-in-One™ pH Buffer Kit

Work with ease using this color-coded pH buffer kit that includes three buffers, storage solution and a storage bottle. STANDARD ALL-IN-ONE PH BUFFER KIT, THERMO SCIENTIFic Orion, 475mL each of 4.01, 7.00 and 10.01

Hanna™ Instruments pH Buffer Solutions

500 ML CALIBRATION SOLUTION HANNA PH 10.01 NISTtraceable 500mL

Hanna™ Instruments pH Buffer Solutions

X1 230ml, pH 4 Buffer Solution

GE Healthcare Whatman™ pH Indicators Reel Dispensers

Used for rapid determination of pH values PH INDIC NARROW 6.4-8.0 7MMX5M

Honeywell Fluka™ Buffer concentrate pH 6.00, For 500 ml buffer solution, citric acid / sodium hydroxide solution, Honeywell Fluka™

for 500 ml buffer solution, citric acid / sodium hydroxide solution 500ML Buffer concentrate pH 6.00 for 500 ml buffer solution, citric acid / sodium hydroxide solution

Scharlab Buffer Solution pH 7

BUFFERTLÖSNING PH 7 250ML

Honeywell Fluka™ Bromothymol Blue Solution, Honeywell™

100ML Bromothymol Blue solution acid-base indicator

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pH papers, pH strips, pH sticks and pH test kits are used in laboratory, industrial and educational environments to qualitatively assess pH levels or monitor acid-base titrations in a range of sample types. pH buffer reference standards are used for the accurate calibration of pH meters and monitors for far more precise and quantitative pH measurement.

pH test papers are supplied either as rolls, tear-off strips, or sticks. They are impregnated with indicator dyes which change colour when dipped into the solution under test. In some products, the indicator dyes are covalently linked to the cellulose fibres to avoid bleed-out (leaching) and contamination of the test samples. 

Some pH papers indicate simple acid or base conditions with a single red-blue colour change (also called litmus papers). Universal pH papers and strips contain a mix of indicator dyes which cover a range of pH values up to and including 0 to 14 in a single test.  The observed colour change is checked against a comparison chart normally supplied with the papers.

Alternatively, for accurate assessment of pH, standard (reference) pH buffers are manufactured to very high degrees of precision and are used for the quantitative calibration of pH meters, electrodes and other electrochemical sensors. Standard buffers are: 

  • Typically supplied at fixed values of pH4.01, pH7.00 and pH10.01
  • May be colour-coded for easy and quick identification 
  • Certified to their nominal pH and accuracy at a specified temperature (typically 20°C)
  • Supplied as ready-to-use solutions or concentrates
  • Contain antifungals for extended shelf life
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