Techniques for detecting, quantifying and localizing antigens and antibodies — ELISA, Western blotting, immunohistochemistry and flow cytometry. Below are the protocols, FAQs and technical articles in our knowledge base tagged with this topic.
In scientific research and production, the same chemical can yield completely different experimental results if its purity and impurity profile are not the same. A “grade” is essentially a combination of convention and standardized description for purity and impurities. It allows data from ...
Distillation grade reagents generally refer to products that, during manufacturing, undergo one or more stages of distillation or redistillation (fractional distillation / redistillation) to remove low-boiling and high-boiling impurities, moisture, and certain reactive impurities. The result is ...
“For Preparative Chromatography” reagents and solvents are quality-controlled specifically for preparative chromatography—i.e., purifying target compounds from the milligram up to kilogram scale.
A qNMR standard is a reference material specifically prepared and certified for quantitative nuclear magnetic resonance (qNMR). Its certificate typically provides.
“for ULC-MS” (also written ULC/MS or UHPLC-MS grade) denotes a solvent/additive quality system intended for ultra-high-performance LC–MS (UHPLC-MS). Its defining feature is not merely “chemical purity,” but fitness-for-purpose in mass spectrometry.
“Photographic grade” identifies reagents whose impurity profile and consistency are suitable for silver-halide photographic processing and emulsion making. The grade is anchored in international/industry test methods and product specifications that focus on trace contaminants known to cause ...
High-Performance Liquid Chromatography (HPLC) separates compounds in a liquid stream by how strongly they interact with a packed column, and derivatization is the deliberate chemical conversion of an analyte into a closely related “derivative” that’s easier to analyze—typically to add a ...
Gas chromatography (GC) separates volatile or semi-volatile compounds as a sample is carried by an inert gas through a coated column; compounds elute at different times based on interactions with the stationary phase. It’s fast, robust, and ideal for analytes that can be vaporized without ...
“Standard for GC” (often shown as for GC, GC grade, or analytical standard, for GC) is a supplier-defined quality grade for neat chemicals or ready-to-use solutions that are intended for gas chromatography workflows. The grade ensures very low background on common GC detectors (FID, ECD, ...
Flow cytometry analyzes cells at the single-cell level and, with multi-laser/multi-channel fluorescence detection, can rapidly measure high-dimensional cell phenotypes, functions, and microenvironments.
In cell culture, single-use compounding systems, IVD components, and sterile tooling, terminal sterilization is often used as one of the risk-control measures.
Basic-Grade Reagents, also known as Laboratory Grade, Practical Grade, or Chemically Pure (CP), are chemicals that meet a manufacturer’s internal specifications for purity. They are intended for applications where high precision and the absence of trace impurities are not critical to the ...
Chemiluminescence (CL) is a highly sensitive detection technique in which chemical reaction energy is converted into light, and it is widely used in immunoassays, nucleic-acid tests, enzyme-activity measurements, and clinical diagnostics.
“For Preparation” denotes a supplier-defined quality tier intended for routine preparative chemistry (organic or inorganic) where ultra-trace impurity control is not critical to the outcome. There’s no single external standard for “for preparation”—manufacturers set the specs and QC ...
Nucleic acid electrophoresis is one of the most commonly used separation and detection methods in molecular biology experiments.
Hydrophilicity / hydrophilic: tendency to be solvated by water and interact with polar groups/solvents.
Hydrogen-storage grade A vendor-defined quality label for materials used to store, absorb/release, or generate H₂—for example metal hydrides (e.g. TiH₂), complex/chemical carriers (e.g., NaBH₄, ammonia borane), and hydrogen-storage alloys (e.g. Mischmetal–Ni).
“For GC derivatization” is a supplier-designated quality label for reagents that are tested and packaged specifically for chemical derivatization prior to gas chromatography (GC/GC-MS)—with emphasis on very low moisture/reactive impurities and proven performance for forming volatile, ...
Battery grade is a vendor-declared quality level for chemicals intended for battery R&D and manufacturing. In practice, it prioritizes ultra-low moisture and acid, very low trace-metal impurities, and—when relevant—electrochemical cleanliness (e.g., low HF/halide, low non-volatile residue).
E 1202 is the EU food additive number for crosslinked polyvinylpyrrolidone (Polyvinylpolypyrrolidone, PVPP). Produced by crosslinking N-vinyl-2-pyrrolidone, PVPP is an insoluble synthetic polymer.
Polymerase chain reaction (PCR) is highly sensitive to raw-material purity and impurity background. Even trace levels of nucleases, metal ions, endotoxin, or organic contaminants can markedly inhibit polymerase activity, lowering sensitivity and specificity and undermining reproducibility.
AR (Analytical Reagent) is a vendor-defined label historically used for chemicals intended for general analytical use in laboratories. It signals a higher level of control over impurities than “technical” or “chemically pure (CP)” grades, and typically provides more detailed ...
A reagent or solvent labeled “for spectroscopy” is manufactured and QC-tested to be optically clean—i.e., it has very low absorbance and minimal fluorescence across specified wavelength ranges so it won’t distort spectra of your analyte. Vendors verify this by measuring UV-Vis (and often ...
With growing global attention to environmental protection, carbon reduction, and sustainable development, traditional reagents and materials derived from petrochemical sources have increasingly exposed issues such as high carbon emissions, non-renewable resources, and heavy waste treatment burdens.
Reagents labeled “for ion-selective electrodes” are chemicals and ready-made solutions whose composition and purity are optimized specifically for potentiometric measurements with ISEs. This usually includes calibration standards, ionic-strength adjusters (ISA/TISAB (Total Ionic Strength ...
With the growing convergence of life science research and clinical applications, conventional laboratory-grade reagents no longer fully meet the needs of medical research and translational use.
“Ph.Eur.” is the official abbreviation for the European Pharmacopoeia (Pharmacopoeia Europaea). It is the legally binding compendium of public quality standards for medicines and the substances used to make them across member states of the Council of Europe and the European Union.
ACS spectrophotometric grade = a reagent/solvent that meets ACS Reagent Chemicals purity specifications and is specially qualified for optical transparency (very low UV–Vis absorbance/fluorescence) so it won’t distort spectrophotometric measurements. In other words, it’s “ACS grade” ...
Natural Extraction Reagents are reagents—primarily solvents and process aids—chosen to extract constituents from natural matrices (plants, microbes, animal tissues, foods).
Biochemical reagents refer to chemical or biological products used in life sciences and related research. They are widely applied in molecular biology, cell biology, biochemistry, pharmacology, and medical research.
Biological stains are indispensable tools in cytology, histology, and microbiology, used to enhance contrast in tissue sections, cellular structures, or microbial morphology.
Immunoprecipitation–mass spectrometry (IP–MS) is a powerful method for studying protein–protein interactions, post-translational modifications, and protein networks.
Gene knockdown (KD) by siRNA, shRNA, or antisense oligonucleotides (ASO) reduces the expression of target genes and is a commonly used strategy for investigating gene function and signaling pathways.
Microbiological research and applications are highly dependent on reagent quality and stability. With the development of molecular biology, synthetic biology, and fermentation engineering, the requirements for laboratory reagents have become more stringent.
Sodium azide (NaN₃) has long been used as a preservative in biological reagents due to its antimicrobial effects. However, sodium azide is highly toxic, non-degradable, and corrosive to metal instruments.
Analysis of Titration solution refers to ready-to-use (or concentrate-to-dilute) standardized titrants supplied specifically for analytical titrimetry, each lot accompanied by a certificate of analysis (true concentration, uncertainty, and traceability). In global literature this map to ...
Hybridoma technology, as the classical method for monoclonal antibody (mAb) production, is widely applied in immunology research, diagnostic reagent development, and antibody drug manufacturing. Because hybridom a cells are highly sensitive to culture conditions and reagent quality, the reagents ...
In pathology and histology research, the reliability of experimental results strongly depends on reagent purity and stability. The preservation of tissue structure and the clarity of staining are directly linked to the accuracy of microscopic observation and data interpretation.
In microbiological research, reagent quality is directly linked to the reliability of experimental results. Differences in purity or impurities can affect bacterial growth and metabolism, and may even alter conclusions.
“For synthesis” (a.k.a. synthesis grade) is a supplier-defined quality tier indicating a reagent is fit for routine preparative chemistry (organic/inorganic) where modest levels of noncritical impurities will not normally derail the intended transformation.
Endotoxin Free grade biological reagents are specialized chemicals or biomolecules used in life science research, biopharmaceutical production, and diagnostics, designed to have minimal or non-detectable levels of endotoxins (also known as lipopolysaccharides or LPS).
DNase, RNase, and Protease-free grade reagents are essential for applications requiring high integrity of DNA, RNA, and proteins. These reagents are specially prepared and tested to ensure they do not introduce nucleases or proteases that would degrade biological macromolecules.
DNase/RNase-Free grade reagents are specially prepared and quality-controlled chemical or biological substances that are free of deoxyribonuclease (DNase) and ribonuclease (RNase) enzyme contamination.
DNase Free grade refers to biological reagents that have been verified to be free of deoxyribonuclease (DNase) enzymes. DNases degrade DNA by cleaving the phosphodiester bonds between nucleotides.
DNA endonucleases and exonucleases free reagents are high-purity biological materials specifically treated or produced under conditions that ensure the absence of detectable DNase (deoxyribonuclease) and RNase (ribonuclease) activities.
Carrier Free (also called Carrier-Free Grade or No Carrier Added (NCA)) biological reagents refer to purified biomolecules—typically proteins like antibodies, cytokines, or enzymes—that are formulated without any carrier proteins such as bovine serum albumin (BSA), gelatin, or human serum ...
The BioReagent grade refers to a quality classification for biological reagents that are suitable for use in biological and biochemical research, especially in applications where a high level of purity, consistency, and low contaminant levels is essential.
Bioactive grade biological reagents are high-purity compounds—typically proteins, peptides, growth factors, cytokines, hormones, or small molecules—that retain full or defined biological activity. These reagents are used primarily in in vitro and in vivo biological studies where functional ...
Animal free grade biological reagents are materials used in life sciences and biomedical research that are produced without the use of animal-derived components at any stage of production, processing, or formulation. These reagents are designed to meet the growing demand for ethical, consistent, ...
ActiBioPure™ is the flagship quality designation from Aladdin Scientific, designed for bioactive recombinant proteins and enzymes. It balances high purity, strong biological activity, and batch-to-batch consistency, making it ideally suited for research and industrial applications such as cell ...
Aladdin Scientific’s Molecular Biology Grade reagents are specially purified and tested for applications in DNA, RNA, and protein research, where even trace levels of contamination can compromise results. Designed for sensitive enzymatic reactions, gene expression, and nucleic acid ...
Aladdin Scientific’s UHPLC-MS Grade solvents and reagents are meticulously refined for use in ultra-high-performance liquid chromatography (UHPLC) systems coupled with mass spectrometry (MS) detection.
ACS Spectrophotometric Grade reagents are specially manufactured to meet both the American Chemical Society (ACS) specifications and stringent optical transparency standards required for UV-Visible spectrophotometry and other high-precision spectroscopic applications.
In life science research, the reliability of experimental results depends not only on the design and execution of the experiments but also on the quality grade of the reagents used.
Laboratory Reagent (LR) Grade materials from Aladdin Scientific offer general-purpose high purity suitable for routine scientific work in academic, industrial, and R&D environments.
Aladdin Scientific offers a curated selection of HPLC Gradient Grade solvents with ≥99.9% purity, specially formulated for use in gradient elution HPLC workflows.
Analytical Standard Grade products from Aladdin Scientific are high-purity chemicals and solutions developed for use as primary or secondary reference standards in a wide range of analytical testing, method validation, and instrument calibration workflows.
The ACS reagent grade standards are compiled by the Analytical Committee of the American Chemical Society and are a general term for high-quality chemical reagents recognized by the American Chemical Society. ACS-grade reagents can be widely used in various experiments requiring high-purity ...
Aladdin Scientific provides a comprehensive portfolio of LC-MS grade solvents, reagents, and additives designed for high-sensitivity liquid chromatography–mass spectrometry (LC-MS) applications.
ACS grade stands for American Chemical Society grade. This designation means that the chemical meets or exceeds the purity and labeling standards set by the ACS Committee on Analytical Reagents. It is one of the highest purity levels for reagents available commercially.
HPLC grade refers to solvents and reagents that meet stringent purity and low UV absorbance criteria required for high-performance liquid chromatography (HPLC). These materials are specifically processed to eliminate contaminants that might interfere with chromatographic detection, ...
“Suitable for Mass Spectrometry” (also referred to as MS-grade ) refers to reagents—especially enzymes and chemicals—that meet strict purity and performance criteria for mass spectrometry (MS)-based applications. These reagents are optimized to ensure minimal background noise, high ...
The LumiDye™ product line
Welcome to Moligand™, Aladdin Scientific's premier sub-brand dedicated to our extensive collection of over tens of thousands of meticulously curated ligands and bioactive small molecules.
At Aladdin Science, we offer products from different sub brands to meet the specific needs of various scientific and industrial applications.
CellNourish™ represents Aladdin Scientific’s commitment to providing high-quality and cost-efficient culture media. Made from premium raw materials, these media cater to a wide range of applications, from academic research to industry-standard testing. The CellNourish™ series includes ...
CellGuard Certified represents a commitment to superior quality and reliability for products used in biological and cell culture applications. This certification guarantees that each product meets stringent standards of purity, performance, and consistency, making it ideal for research and ...
Difference between BioReagent and UltraBio™ Grades
At Aladdin Scientific, we offer a comprehensive range of product grades to meet the diverse needs of our customers across various scientific fields. Here is a detailed introduction to help you understand the specific applications and purity levels of our products.
UltraPureChrom™: The Pinnacle of Purity for Chromatography
PharmPure™ is a trademark representing a GMP grade of biopharmaceutical raw and starting materials. Designed to meet the highest standards of quality and compliance, PharmPure™ products support various stages of biopharmaceutical manufacturing, from early development to high-risk ...
UltraBio™ is a mark of superior quality for products used in molecular biology applications. This certification guarantees that each product meets the highest standards of purity, performance, and consistency, ensuring reliability for both research and industrial purposes.
ActiBioPure™ represents the pinnacle of quality for bioactive recombinant products. This certification ensures that each product meets the highest standards of purity, activity, and consistency, making them ideal for both research and industrial applications.
EnzymoPure™ is Aladdin Scientific’s premier trademark for a comprehensive range of high-quality enzymes designed for use in both biological and chemical industries. Our enzymes are meticulously produced and purified to ensure exceptional performance, reliability, and consistency across ...
At Aladdin Scientific, we offer a comprehensive range of product grades to meet the diverse needs of our customers across various scientific fields. Here is a brief overview to help you understand the specific applications and purity levels of our products:
PureSpectra™ signifies a mark of excellence for products used in spectroscopy applications. This certification guarantees that each product meets the highest standards of purity, performance, and consistency, ensuring accurate and reliable results for both research and industrial purposes.
ExactAb™ represents Aladdin Scientific commitment to precision, purity, and reliability in antibody solutions. This trademark encompasses a range of hybridoma and recombinant antibodies, designed to meet the highest standards of performance for research, diagnostic, and therapeutic ...
PrimorTrace™ and PrimorTrace™ Ultra by Aladdin Scientific
Techniques often explored alongside immunological experiments.
