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You are here: Home / Archives for White Papers

Meeting USP Chapter 831 – Temperate Validation requirements for Refractometers.

Download a PDF of this Whitepaper Temperature validation for refractometers is crucial to ensure temperature accuracy in pharmaceutical validation according to the latest release of USP Chapter 831. Here’s why it’s important: Accuracy of Refractive Index Measurements: Refractive index is a temperature sensitive property, and even small temperature variations can impact the Refractive Index measurement […]

Filed Under: White Papers Tagged With: white paper

Craft Spirits Vol 8 September

UNDERSTANDING PROOFING AND GAUGING  Navigating U.S. regulations and methods for determining alcoholic strength.BY TYLER DERHEIM  Before we dive into the topic of proofing and gauging, it’s useful to establish some background and definitions; while they may be familiar to you as experienced distillers, these will form the vocabulary for this article. These definitions and regulations […]

Filed Under: News, White Papers Tagged With: alcohol, Density Meter, proof testing, proofing

J57/J157AB Refractometer Measurement of Urea Concentration for Diesel Engine Additives

J57AB & J157AB

J57AB /J157AB Refractometers for Measurement of Urea Concentration for Diesel Engine Additives Standards Designed in accordance with DIN 70071 / ISO 22241-2 Basic operation The J57AB is a sub model of the J57HA and most details on the Technical Bulletin 941 apply; the J157AB is a sub model of the J157 and most details on […]

Filed Under: White Papers Tagged With: refractometer, refractometers

Automobile Industry Refractometer Options Package

Suggested users Car and truck manufacturing factories looking to check fluids before they are put in new vehicles Laboratories which analyze fluids from in-service vehicles Companies making concentrated urea solutions that will eventually get diluted and sold to use in diesel engines Companies buying concentrated urea solutions and diluting them for use in diesel engines […]

Filed Under: White Papers Tagged With: refractometer, refractometers

Invert Sugar Measurements

WHY MEASURE INVERT SUGAR ? – BACKGROUND Inverted sugar syrup, also called invert syrup is essentially sugar in water. Invert sugar is a mixture of the monosaccharides glucose, and fructose, that is made by hydrolytic saccharification of the disaccharide sucrose. This mixture’s optical rotation is opposite to that of the original sugar, which is why […]

Filed Under: Technical, White Papers Tagged With: Autopol, refractometer

European Pharmacopoeia Essential Oils for Changes Optical Rotation Measurements

Optical Rotation - Sweet Orange Oil

Changes to the European Pharmacopoeia Essential Oils regarding Optical Rotation Measurements / Polarimeter Measurements In April 2022 there is a change coming to the European Pharmacopoeia regarding the measurement of essential oils such as Sweet Orange Oil. The revised monograph requires that samples now need to be measured in a 0.1 dm (10mm) length cell […]

Filed Under: White Papers Tagged With: Automation, Autopol, essential oils, European Pharmacopeia, Optical Rotation

Accurate Determination of Sulfuric Acid Concentration

Density S4 Sulfuric Acid Measurement

ACCURATE DETERMINATION OF SULFURIC ACID WITHIN THE CHEMICAL, ACCUMULATORS, FERTILIZERS, METAL, AND PLASTICS INDUSTRIES The Density – Concentration Relationship of H2SO4 As the concentration of the Sulfuric Acid increases, the density also increases. This fairly linearrelationship goes from 0% concentration up to approximately 96% or 97%. However, somewhere around 93% the linear relationship starts to […]

Filed Under: White Papers Tagged With: Density Meter, refractometer

ANALYSIS OF CLEANING PRODUCT RAW MATERIALS

Density Meter

Preamble – Measuring Cleaning Product Materials The current crisis is bad, but it is a crisis and will get resolved. One of the left-over effects from it that will persist for many years though is an increased effort on cleaning. Airplane seats, sports venues and even doorknobs on residential houses are going to be subject […]

Filed Under: White Papers Tagged With: Density Meter, refractometer

Measurement of Concentration Dependence of Refractive Index to Confirm Gel Permeation Chromatography Parameter

Measurement of Concentration Dependence of Refractive Index to Confirm Gel Permeation Chromatography Parameter Application Note November 2019 by Gabor Kiss Background: Gel Permeation Chromatography Refractometer One of the workhorse techniques for polymer characterization is Gel Permeation Chromatography (GPC) which is used to measure molecular weight, molecular weight distribution, degree of branching, radius of gyration, solvent […]

Filed Under: White Papers Tagged With: refractometer, refractometer calibration, refractometer validation, refractometers

Measurement of Concentration Dependence of Refractive Index to Enhance Gel Permeation Chromatography for Polymer Characterization

Measurement of Concentration Dependence of Refractive Index to Enhance Gel Permeation Chromatography for Polymer Characterization Author: Gabor Kiss Date: October 2019 Background: One of the workhorse techniques for polymer characterization is Gel Permeation Chromatography (GPC) which is used to measure molecular weight, molecular weight distribution, degree of branching, radius of gyration, solvent power, etc. The […]

Filed Under: Uncategorized, White Papers Tagged With: dn/dc, dndc, Gel Permeation Chromatography, GPC, refractive index, refractometer, refractometers

Refractometer Temperature Boost Option

J Series Refractometer Temperature Boost Option Technical Bulletin J Series Refractometer with Temperature Boost Option The Rudolph Research Analytical J Series of refractometers are able to control temperature accurately in addition to reproducibility to the range mentioned in the relevant technical bulletin. However, for certain applications beyond that range, particularly in petroleum, pharmaceutical, plastics, specialty […]

Filed Under: White Papers Tagged With: high temperature, refractometer, refractometers, temperature boost

Ultra Low Volume Refractometer

Ultra Low Volume Refractometer Background Low Volume Refractometer The Ultra Low Volume Refractometer (ULV) option is designed for situations where only a very limited amount of sample is available. This is often related to the biological sciences, but the ULV instrument will handle the same range of materials that a standard refractometer will. Refractometer Design […]

Filed Under: White Papers Tagged With: refractometer, refractometers, Ultra Low Volume Refractometer

Refractometer Validation

Refractometer Validation   Refractometer Validation – In a regulated laboratory the purchase price of an instrument is only relatively small part of the total cost. For some instruments there are expensive consumables and the manufacturer will provide the original instrument very inexpensively in order to lock the laboratory into these. For other instruments the manufacturer […]

Filed Under: White Papers Tagged With: refractometer calibration, refractometer validation

Polarimeter Cell Filling Solutions

New innovations in Polarimeter cell filling from Rudolph Research. Introducing the Rudolph Research Analytical AutoFill™(Patent Pending) Filling a Polarimeter Cell has never been easier. Polarimeter cell filling made easy – Rudolph Research Analytical developed AutoFill™ (Patent Pending) a simple and easy way for fast and reliable polarimeter cell loading. Polarimeter sample cells are filled without […]

Filed Under: White Papers Tagged With: polarimeter, Polarimeter Cell

UAN Fertilizer Concentration Analysis – Measure RI & Density for % Concentration

Rudolph Research – Fertilizer Industry Application for UAN Analysis. UAN Fertilizer Concentration Analysis – Measure RI & Density for % Concentration UAN 32 is a formulation consisting of 45% Ammonium Nitrate, 35% Urea with 20% water content. The resulting total nitrogen concentration is 32%. Half coming from the Ammonium Nitrate and the other half from […]

Filed Under: White Papers Tagged With: Automation, density, Density Meter, refractometer, Refratometer, Uan Fertilizer Analysis, UAN Testing

J157HA-BUTYRO Refractometer

Digital Refractometer J357

BUTYRO Refractometer J157HA – for the Analysis of Food in Line with Indian Food Safety Standards All BUTYRO Refractometer J157HA offers the following features: Range 1.32 to 1.53 Refractive Index / 0 – 100 Brix which is sufficient to measure all edible oil and sugar materials in standards. Accuracy of 0.00002 Refractive Index / 0.02 […]

Filed Under: White Papers Tagged With: butyro refractometer, refractometer, white paper

Refractive Index for Particle Size Analysis

Refractometers for Powder – Particle Size Analysis Refractometers to measure the RI for Powder Size Analysis – In May 2015 Rudolph Research Analytical released additional capabilities for all pharmaceutical level refractometers. The J257, J357, and J457 refractometers come standard with a method for measuring the RI or refractive index of powders as required by a […]

Filed Under: White Papers Tagged With: refractometer

Drug Diversion in the Hospital Pharmacy

Pharmaceutical Polarimeter

Drug Diversion in the Hospital Pharmacy Drug Diversion Background: Hospital pharmacies are responsible for dispensing drugs including powerful and regulated narcotics to hospital patients including pain medications during and after surgery. The hospital pharmacist is concerned with dispensing the correctly prescribed drug in the prescribed doses. Then any unused drug is returned for proper disposal. […]

Filed Under: White Papers Tagged With: drug diversion, drug diversion prevention system, drug diversion testing system, hospital pharmacy, refractometer, Verilink

Refractometer Data Storage

Refractometer

Refractometer Data Storage – Applies to Rudolph Research J257, J357, and J457 Laboratory Refractometers Embedded systems – Refractometer Data Storage Refractometer Data Storage – All Rudolph refractometers are equipped with a control system using Windows Embedded. This control system has 32mb of on board memory which is extendable using USB sticks. The control system can […]

Filed Under: White Papers Tagged With: refractometer

Refractive Index – RI Measurement of Solids & Films

RI Measurement of Solids, Semi Solids and Films. RI measurement of solids and semi-solids is useful in labs for monitoring quality to insure consistency of transparency, pigmentation, or batch quality. Refractive Index might be measured on incoming materials or finished products. Highly accurate measurements are possible with the right refractometer and a method to measure […]

Filed Under: White Papers Tagged With: Films, glass, Plastic, R/I, refractive index, refractometer, resins, Semi-solids, silicone, Solids, Tape

Density Meter – Refractometer Instrument Combinations

Sulfuric Acid Measurement

Versatile Density Meter – Refractometer Instrument Combinations from Rudolph Research Analytical. Combined Density Meter – Refractometer Instrument Combinations Many users need to measure both refractive index and density and feel that a combined system will be a good alternative.  The advantages of such a system are many; Since parts are shared the total cost of […]

Filed Under: Products, White Papers Tagged With: Density Meter, refractometer

Refractometer Uses in Industry and Selection

Refractometer

Refractometer Uses in Industry and Selection By Angelo DePalma, PHD Refractometer uses: Characterizes fluids based on their refractive index –the refraction occurs due to the change in the speed of light as it travels through a material of one density to one of different density. By definition a vacuum has a refractive index of 1, […]

Filed Under: White Papers Tagged With: Brix, laboratory, R/I, refractive index, refractometer, refractometers, refractometry

Refractometer Calibration – 2 Point Method

Rudolph J157

Refractometer Calibration, 2 point method, Rudolph Research J157 – Video Transcript Refractometer Calibration resource – for laboratory refractometer users utilizing a Rudolph Research Automatic Refractometer. Hi, I am John Ciccarella, Service manager of the most innovative line of refractometer instruments made today from Rudolph Research Analytical.   John Ciccarella , Rudolph Research, Service Manager with a […]

Filed Under: Uncategorized, White Papers Tagged With: calibrate, calibration, calibration fluid, digital, laboratory, R/I, refractive index, refractometer, refractometer calibration, refractometers

Specific Rotation Equation vs Optical Rotation

Polarimerty Diagram

Specific Rotation Equation vs. Optical Rotation – What’s the Difference? By Angelo DePalma, PHD Polarimetry using Polarimeters measure the degree of rotation of polarized light as it passes through an optically active material. If you’re learning about Polarimetry you might come across  the terms specific rotation and optical rotation. What is the specific rotation equation […]

Filed Under: White Papers Tagged With: Optical Rotation, polarimeter, polarimetry, polarimetry definition, Specific Rotation

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