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Howei offers a portfolio of over 20,000 reference materials, covering fields such as environment, petrochemicals, pharmaceuticals, clinical diagnostics and toxicology, forensics, food and beverage, GMOs, cosmetics, and veterinary medicine. Many of our products comply with national pharmacopoeias and European pharmacopoeias. Our subsidiary brand, Codow®, provides over 20,000 standard solutions and reference materials. We also offer efficient OEM and customized products and services.
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Environmental Analysis & Pesticide Standards
Environmental analysis is a technical means of studying environmental data using statistical methods to identify environmental problems and support environmental or business decisions, encompassing both environmental protection and business fields. Its core processes include exploratory data analysis, model selection analysis, and inferential analysis, applied to pollutant monitoring and pattern identification.
ICP & AAS Standards
Howei offers a comprehensive range of single-element and multi-element standards, ion buffers, and environmental standards for atomic spectroscopy. H&W's range of mixed standards provides traceability assurance, enabling invaluable, accurate, and reliable calibration; all standards are formulated to clearly defined specifications to ensure consistency. Each solution is prepared using high-purity raw materials, which are regularly tested according to CNAS guidelines, ensuring traceability.
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ChP Standards
Pharmacopoeia standards are standard substances used in national drug standards for the determination of content, potency, or toxicity. They include various types such as chemical composition, physical properties, and biochemical quantities, and must possess homogeneity, stability, and traceability.
General Reference Standards
Standard reference materials are homogeneous substances with defined characteristic values, used for calibrating instruments, evaluating methods, and quality control. They can be in the form of pure or mixed gases, liquids, or solids. Their properties must meet the requirements of accuracy, homogeneity, and stability.
Certified Reference Materials
Standard substances are developed and produced under the authorization of authoritative institutions. They have one or more characteristics that have been determined and are used to calibrate measuring instruments, evaluate measuring methods, or determine the value of material properties. They are accompanied by certificates and are classified into Level 1 (high-precision calibration) and Level 2 (routine testing) according to their accuracy.
Food Additive Standards
The food additive standards provided by Howei are suitable for a variety of analytical applications, including but not limited to drug release detection, drug method development for qualitative and quantitative analysis, food and beverage quality control testing, and other calibration requirements.
Amino Acid Peptide & Protein Standards
Amino acid, peptide, and protein reference materials are crucial for various analyses, including proteomics and food testing. We offer specially designed standards and certified reference materials for a wide range of heavy and light chain peptides, enzymes, intact proteins, amino acids, and stable isotope-labeled analogs.
These reference materials can be used in applications such as biomarker discovery, drug research, clinical and diagnostic testing, top-down and bottom-up proteomics, and mass spectrometry for food certification.
Carbohydrate Standards
Carbohydrates are polymers and derivatives of monosaccharides, classified by degree of polymerization into monosaccharides (such as glucose and fructose), oligosaccharides (such as sucrose), and polysaccharides (such as starch and cellulose).
We provide a wide range of carbohydrate standards for analytical testing (including drug release assays), drug method development, and food and beverage quality control. Our standards cover various quality grades and are suitable for chromatographic analysis.
Metrological Institutes Standards
We distribute reference materials from the National Institute of Metrology (NIM), Environmental Protection Research Institute, and Iron & Steel Research Institute, including National Certified Reference Materials (NCRM), National Standard Samples (GSB), and the National Institute of Standards and Technology (NIST). We also provide internationally recognized standards from national metrology institutes. These analytical standards can be used in various method validation practices, including instrument qualification and calibration, analytical method validation, system suitability testing, and laboratory and quality control checks.
Microbiology Standards
The microbial standards we provide are standard substances used for bioassays, content determination, or potency assays in antibiotics or biological products, and are typically expressed in potency units (U).
In pharmaceutical testing, they serve as a control for determining drug quality and are an indispensable tool for controlling drug quality.
Pharmaceuticals Standards
The pharmaceutical analytical standards provided by Howei are used for the determination of content, potency, or toxicity. They include various types such as chemical composition, physical properties, and biochemical quantities, and are characterized by homogeneity, stability, and traceability. All products come with an analytical certificate.
Physical Property Standards
The physicochemical standards provided by Howei are suitable for measuring the physical and chemical properties of substances to determine their characteristics and purity, such as: ultraviolet/visible spectroscopy (UV/VIS), conductivity, particle size, density, flash point, refractive index, viscosity, etc. Laboratories have an increasing need for high-quality analytical data, which requires calibrating laboratory equipment using analytical standards to achieve advanced levels of accuracy.
Vitamin Standards
Howei offers a wide range of fat- and water-soluble vitamins for various chromatographic, mass spectrometric, and other analytical applications.
Howei's standards can be used for quality control analysis of various vitamin-related dietary supplements, fortified foods, cosmetics, and pharmaceutical preparations, or for diagnostic testing of vitamin deficiencies. H&W's vitamin reference standards product line includes reference materials in solution form, specifically designed to minimize degradation and extend shelf life.
Phytochemical Standards
The Howei Standards of Materials series includes a variety of isolated plant components, which can be major components, common markers, or toxic substances of widely used medicinal plants. The product portfolio includes natural compound categories such as alkaloids (including various pyrrolidine alkaloids), isopentenylenes (terpenes), flavonoids, phenylpropanoids, quinones, tannins, and glucosides.
EP Reference Materials
EP standards refer to reference materials based on the European Pharmacopoeia. EP standards are widely used in the production of chemical, pharmaceutical, and biological products in Europe, and are indispensable items in these industries, serving as a quality reference standard for the European chemical sector.
Selecting Products Filters
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Product No.Product NameProduct Spec.BrandPrice
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c[(NH4)2Fe(SO4)2·6H2O]＝0.25 mol/LCodow -
c(C8H12N·2HCl)=10 g/LCodow -
c(C12H6Cl2NNaO2·xH2O)=1 g/L,中国药典Codow -
中国药典,c(C24H20BNa)=1 g/LCodow -
中国药典,c(C6H7NO3S+C10H9N)=2 g/L,5+1Codow
