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Test & Assay Development

Lateral Flow Immunoassays (LFIA)

Lateral flow test strips based on the principles of immunochromatography exist for a wide array of target analytes. Today, there are commercially available tests for monitoring ovulation, detecting infectious disease organisms, analyzing drugs of abuse, and measuring other analytes important to human physiology. Products have also been introduced for veterinary testing, agricultural applications, environmental testing, and product quality evaluation. While the fist tests presented qualitative results based on the presence or absence of a signal line, test design has progressed toward semiquantitative and quantitative assays and the integration of hand-held readers.

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Gold Nanoparticles

Cat. No. Product Name Packing Size
BG-40 DiagNano™ Gold Nanoparticles, 40 nm 20, 100, 500, 1000 mL
SG-30 DiagNano™ Stabilized Gold Nanoparticles, 30 nm 20, 100, 500, 1000 mL
SG-40 DiagNano™ Stabilized Gold Nanoparticles, 40 nm 20, 100, 500, 1000 mL
SG-50 DiagNano™ Stabilized Gold Nanoparticles, 50 nm 20, 100, 500, 1000 mL
UG-35 DiagNano™ Ultrapure Gold Nanoparticles, 35 nm 20, 50, 100, 250 mL
UG-40 DiagNano™ Ultrapure Gold Nanoparticles, 40 nm 20, 50, 100, 250 mL
GPK-30 DiagNano™ Gold Nanoparticle Passive Conjugation Kit, 30 nm 100 mL
GPK-40 DiagNano™ Gold Nanoparticle Passive Conjugation Kit, 40 nm 100 mL
GPK-50 DiagNano™ Gold Nanoparticle Passive Conjugation Kit, 50 nm 100 mL

Polystyrene Microspheres

Cat. No. Product Name Packing Size
DNM-P002 DiagPoly™ Plain Polystyrene Particles, 0.1-0.2 µm 10 mL (5.0% w/v)
DNM-P003 DiagPoly™ Plain Polystyrene Particles, 0.2-0.3 µm 10, 100 mL (5.0% w/v)
DNM-P004 DiagPoly™ Plain Polystyrene Particles, 0.4-0.6 µm 10, 100 mL (5.0% w/v)
DNM-F024 DiagPoly™ Carboxyl Polystyrene Particles, 0.1 µm 10 mL (50 mg/mL)
DNM-F025 DiagPoly™ Carboxyl Polystyrene Particles, 0.2 µm 10 mL (50 mg/mL)
DNM-F026 DiagPoly™ Carboxyl Polystyrene Particles, 0.4 µm 10 mL (50 mg/mL)
DNM-F027 DiagPoly™ Carboxyl Polystyrene Particles, 0.6 µm 10 mL (50 mg/mL)
DNM-L064 DiagPoly™ Carboxyl Fluorescent Polystyrene Particles, Yellow, 0.4-0.6 µm 2 mL (1.0% w/v)
DNM-L072 DiagPoly™ Carboxyl Fluorescent Polystyrene Particles, Nile Red, 0.4-0.6 µm 2 mL (1.0% w/v)
DNM-L078 DiagPoly™ Carboxyl Fluorescent Polystyrene Particles, Pink, 0.4-0.6 µm 2 mL (1.0% w/v)
DNM-L086 DiagPoly™ Carboxyl Fluorescent Polystyrene Particles, Sky Blue, 0.4-0.6 µm 2 mL (0.25% w/v)

Quantum Dots

Cat. No. Product Name Functional Group Storage Buffer
DNK-F001 DiagNano™ PEG-COOH CdS/ZnS Quantum Dots, 420 nm Carboxyl Water
DNK-F005 DiagNano™ PEG-COOH CdS/ZnS Quantum Dots, 450 nm Carboxyl Water
DNK-F009 DiagNano™ PEG-COOH CdSe/ZnS Quantum Dots, 500 nm Carboxyl Water
DNK-F013 DiagNano™ PEG-COOH CdSe/ZnS Quantum Dots, 520 nm Carboxyl Water
DNK-F017 DiagNano™ PEG-COOH CdSe/ZnS Quantum Dots, 570 nm Carboxyl Water
DNK-F021 DiagNano™ PEG-COOH CdSe/ZnS Quantum Dots, 620 nm Carboxyl Water
DNK-F025 DiagNano™ PEG-COOH ZnSe/ZnS Quantum Dots, 410 nm Carboxyl Water
DNK-F029 DiagNano™ PEG-COOH ZnSe/ZnS Quantum Dots, 430 nm Carboxyl Water
DNK-F033 DiagNano™ PEG-COOH InP/ZnS Quantum Dots, 540 nm Carboxyl Water
DNK-F037 DiagNano™ PEG-COOH InP/ZnS Quantum Dots, 590 nm Carboxyl Water
DNK-F041 DiagNano™ PEG-COOH InP/ZnS Quantum Dots, 640 nm Carboxyl Water
DNK-F045 DiagNano™ PEG-COOH InP/ZnS Quantum Dots, 690 nm Carboxyl Water
DNK-F049 DiagNano™ PEG-COOH PbS Quantum Dots, 900 nm Carboxyl Water
DNK-F053 DiagNano™ PEG-COOH PbS Quantum Dots, 1000 nm Carboxyl Water
DNK-F057 DiagNano™ PEG-COOH PbS Quantum Dots, 1100 nm Carboxyl Water
DNK-F061 DiagNano™ PEG-COOH PbS Quantum Dots, 1200 nm Carboxyl Water

Upconverting Nanoparticles

Cat. No. Product Name Packing Size
DNL-B006 DiagNano™ Water Dispersible Upconverting Nanoparticles, 365 nm 10, 20, 50 mg
DNL-B007 DiagNano™ Water Dispersible Upconverting Nanoparticles, 475 nm 10, 20, 50 mg
DNL-B008 DiagNano™ Water Dispersible Upconverting Nanoparticles, 545 nm 10, 20, 50 mg
DNL-B009 DiagNano™ Water Dispersible Upconverting Nanoparticles, 660 nm 10, 20, 50 mg
DNL-B010 DiagNano™ Water Dispersible Upconverting Nanoparticles, 804 nm 10, 20, 50 mg

Chemiluminescent Immunoassays (CLIA)

CLIAs are excellent assays for high throughput, low analyte concentration, time sensitive testing and isolation. Using coated magnetic beads as the reagent in a CLIA is an easy and established technique favored among many clinical scientists.

How to choose the proper magnetic bead for your particular assay? Be sure to consider all of the following variables:

a. Bead size (try to work with medium-sized beads, around 1.0 µm if possible)
b. Bead material (PS or PS/DVB, other types of materials or encapsulated if possible)
c. Bead with a higher magnetic pigment content (between 30% and 50% if possible)
d. Bead surface properties (plain, modified, pre-activated or bio-activated)
e. Bead batch size
f. If what you need is not available; ask us to develop a custom product to fit your specific needs.

Carboxyl Magnetic Particles

Cat. No. Product Name Concentration Packing Size
WHM-S029 Absolute Mag™ Carboxyl Magnetic Particles, 1 μm 25 mg/ml 10 mL; 100 mL; 1000 mL
WHM-S030 Absolute Mag™ Carboxyl Magnetic Particles, 2.4 μm 25 mg/ml 10 mL; 100 mL; 1000 mL
WHM-S031 Absolute Mag™ Carboxyl Magnetic Particles, 3.0 μm 25 mg/ml 10 mL; 100 mL; 1000 mL

Tosyl Magnetic Particles

Cat. No. Product Name Concentration Packing Size
WHM-L075 Absolute Mag™ Tosyl Magnetic Particles, 2.8 µm 30 mg/mL 2 mL; 10 mL
WHM-L081 Absolute Mag™ Tosyl Magnetic Particles, 1 µm 100 mg/mL 2 mL

Streptavidin Magnetic Particles

Cat. No. Product Name Concentration Packing Size
WHM-S103 Absolute Mag™ Streptavidin Magnetic Particles, 1.0 μm 10 mg/ml 10 mL; 100 mL; 1000 mL
WHM-S104 Absolute Mag™ Streptavidin Magnetic Particles, 1.5 μm 10 mg/ml 10 mL; 100 mL; 1000 mL
WHM-S105 Absolute Mag™ Streptavidin Magnetic Particles, 2.4 μm 10 mg/ml 10 mL; 100 mL; 1000 mL
WHM-S106 Absolute Mag™ Streptavidin Magnetic Particles, 3.0 μm 10 mg/ml 10 mL; 100 mL; 1000 mL

Other specifications can be tailored according to customer requirements.

Latex Particle-enhanced Turbidimetric Immunoassay (LETIA)

Latex particle-enhanced turbidimetric immunoassay (LETIA) is commonly used to quantify serum protein in a homogenous system, which is accurate and stable. In LETIA, antibodies are covalently attached to polymer latex microspheres with antigen binding site exposed, and turbidimetric of reaction solution is changed when antibody-microsphere-antigen complex is formed. Besides, linear correlation between antigen concentration and absorbance at a specific range makes this assay applicable to quantify concentration of antigen.

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Cat. No. Product Name Functional Group Packing Size
DNM-F001 DiagPoly™ Amine Polystyrene Particles, 0.2 µm Amine 10 mL, 100 mL, 1 L
DNM-F002 DiagPoly™ Amine Polystyrene Particles, 0.3 µm Amine 10 mL, 100 mL, 1 L
DNM-F024 DiagPoly™ Carboxyl Polystyrene Particles, 0.1 µm Carboxyl 10 mL, 100 mL, 1 L
DNM-F025 DiagPoly™ Carboxyl Polystyrene Particles, 0.2 µm Carboxyl 10 mL, 100 mL, 1 L

Other specifications can be tailored according to customer requirements.

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