{"product_id":"hanna-instruments-hi-7004c-red-coloured-buffer-solution-4-01-ph-value-25-c-500-ml","title":"Hanna Instruments HI-7004C Red coloured Buffer solution 4.01 pH Value @25°C, 500 mL","description":"\u003cp\u003eHI-7004C Red coloured Buffer solution 4.01 pH Value @25°C, 500 mL. Achieve accurate pH readings and check your meter and electrode is functioning correctly with Hanna buffer solutions.\u003c\/p\u003e\u003ch3\u003eHI-7004C Red coloured Buffer solution 4.01 pH Value @25°C, 500 mL\u003c\/h3\u003e \u003cp\u003eThe pH 4.01 buffer is available in a 500ml bottle, one of the most commonly used buffer solutions. It is extremely stable and represents the mid-way point in the acid range of the pH scale - ideal for those requiring an accurate acid reading, particularly those working in water purification plants, the food industry, and wherever the pH is expected to be acidic.\u003c\/p\u003e \u003cp\u003eBuffer solutions should be stored at 25◦C, away from direct sunlight for accurate readings.\u003c\/p\u003e \u003cp\u003eTo correctly maintain your meter\/electrode, we highly recommend use of a Hanna cleaning solution, as well as a buffer, for maximum performance every time. pH4, along with pH7, can also be used as an emergency storage solution.\u003c\/p\u003e \u003cp\u003eHanna buffer solutions are prepared, ready-to-use, according to precise formulas and standardised in accordance with the National Institute of Standards and Technology (NIST) to ensure quality and accuracy. All solutions show a batch number, an expiry date, and the correlation table between pH and temperature. A certificate of analysis is available on request. All bottled solutions are sealed with an air tight, tamper-proof seal to prevent any Carbon Dioxide from entering and causing a change in the pH buffer value.\u003c\/p\u003e \u003ch3\u003eBrowse the Hanna complete range of solutions\u003c\/h3\u003e \u003cul\u003e \u003cli\u003epH buffer solutions\u003c\/li\u003e \u003cli\u003eStandard solutions for conductivity, Total Dissolved Solids (TDS), turbidity, salinity and Ion-Selective Electrode (ISE) calibration\u003c\/li\u003e \u003cli\u003eOxidation Reduction Potential (ORP) test and pre-treatment solutions\u003c\/li\u003e \u003cli\u003eReference fill solutions for refillable electrodes\u003c\/li\u003e \u003cli\u003eGeneral and specific cleaning solutions for electrodes\u003c\/li\u003e \u003cli\u003eSolutions for electrode maintenance and storage\u003c\/li\u003e \u003cli\u003eSolutions for sample preparation\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eSolutions are available in many sizes ranging from 20ml sachets for small users to 3.78L (1 gallon) containers for large quantity usage in laboratories.\u003c\/p\u003e \u003cp\u003eFor safety and traceability, all Hanna solutions are provided with a label showing the batch number and expiry date. A certificate of analysis is available on request in line with NIST standards.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eRemember:\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003eCalibration only counts when using fresh solutions and properly cleaned electrodes every time.\u003c\/li\u003e \u003cli\u003eRoutine maintenance will ensure accurate readings while extending the life of the electrode.\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eUseful information: \u003c\/strong\u003e\u003c\/p\u003e \u003cp\u003eColour Coding for 1L and 1 gallon bottles:\u003c\/p\u003e \u003cul\u003e \u003cli\u003epH 4.01 - Red\u003c\/li\u003e \u003cli\u003epH 7.01 - Green\u003c\/li\u003e \u003cli\u003epH 10.01 – Violet\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eAll calibration buffers are made to a premium quality, produced in accordance with ISO 3696\/BS3978 standards using high purity salts, deionised water, certified weight-checked balances, and Class A glassware in a temperature controlled environment monitored with certified thermometers.\u003c\/p\u003e \u003cp\u003eAll bottles meet with FDA Standards (US Food and Drug Administration).\u003c\/p\u003e \u003ch3\u003e*Millesimal and Technical Buffer solutions explained\u003c\/h3\u003e \u003cp\u003eDesigned and manufactured for those where accuracy really is vital, Millesimal buffer solutions are produced to a premium quality for customers who require a greater resolution of 0.001 for pH measurements. Accuracy can be guaranteed at +\/- 0.002 @ 25◦C.\u003c\/p\u003e \u003cp\u003eTo achieve the more accurate results, Millesimal Buffer solutions are available in pH1.000, pH1.679, pH2.000, pH3.000, pH4.010, pH6.000, pH6.862, pH7.010, pH8.000, pH10.010, pH11.000, pH12.000, pH12.450, pH13.000.\u003c\/p\u003e \u003cp\u003eFor those requiring a greater spectrum, as well as increased accuracy to readings, Hanna also manufacture a Technical Buffer solution range which share the accuracy of standard buffers, +\/- 0.01 @ 25◦C, and feature two extra pH levels, \u003cb\u003epH1.00\u003c\/b\u003e and \u003cb\u003epH5.01\u003c\/b\u003e, along with pH4.01, pH6.86, pH7.01, and pH10.01.\u003c\/p\u003e \u003cp\u003eBoth technical and Millesimal buffer solutions come with a certificate of analysis on purchase.\u003c\/p\u003e","brand":"Hanna Instruments","offers":[{"title":"Default Title","offer_id":57640070906229,"sku":"HI-7004C","price":31.73,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0574\/5511\/6439\/files\/hi-7004c-red-coloured-buffer-solution-4-01-ph-value-at25-c-500-ml.jpg?v=1791580445","url":"https:\/\/testallwater.co.uk\/products\/hanna-instruments-hi-7004c-red-coloured-buffer-solution-4-01-ph-value-25-c-500-ml","provider":"Test All Water","version":"1.0","type":"link"}