Quality controls in liquid format eliminate the need for reconstitution, a necessary step with lyophilized, or freeze-dried, controls. Liquid controls are used in clinical chemistry labs, research organizations, diagnostic manufacturers, and in point-of-care testing to detect deviations in reagents or analyzers, thus ensuring the accuracy of test results. Liquid controls may be assayed or unassayed, human or bovine, and may cover a single analyte or over 100 parameters, including proteins, cardiac markers, CRP, lipids, blood gases, immunoassays, and electrophoresis. Controls with target values for an array of hormones and therapeutic drugs, tumor marker controls, and urine and urinalysis controls are also available.
What to Consider When Choosing a Liquid Quality Control?
Generally, liquid-format controls have a two-year unopened shelf life, and may be liquid frozen at –20 °C or liquid stable at +2–8 °C. Eliminating reconstitution saves time and minimizes the risk of pipetting errors.
Search and compare liquid quality controls:
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| Company | Bio-Rad Laboratories | Bio-Rad Laboratories | Bio-Rad Laboratories | Bio-Rad Laboratories | Bio-Rad Laboratories |
| Item | Liquichek™ Qualitative Urine Toxicology Control, Negative Level | GonoPROBE, Single Level Control | Liquichek Blood Gas Control, Level 1 | Liquichek Hematology Control (A), Trilevel | Liquichek Whole Blood Immunosuppressant Control, Trilevel |
| Catalog Number | 454 | 123 | 571 | 865 | 657 |
| Price | Supplier Page | Learn More | Supplier Page | Supplier Page | Learn More |
| Description | Assayed, liquid human urine negative control for monitoring precision of qualitative urine toxicology assays (6 x 3 mL) | Unassayed, liquid human serum based reactive control for detecting Neisseria gonorrhoeae nucleic acids with GEN-PROBE® PACE® 2C (1 x 5 mL) | Assayed, aqueous control for blood gas on blood gas instrumentation; level 1 of 3 (30 x 1.7 mL) | Assayed, liquid hematology control for Abbott CELL-DYN® 3 and 5 part differential analyzers for up to 21 parameters; trilevel (12 x 3 mL) | Assayed, liquid human whole blood control for 3 widely prescribed immunosuppressant drugs and Everolimus; (12 x 2 mL) |
| Stability | 3 year shelf life at 2–8°C | 2 year shelf life at 2 to 8°C | 4 year shelf life at 18 to 25°C | 78 day shelf life at 2 to 8°C | 3 year shelf life at -20°C to -70°C |
| Size(s) | 6 x 3 mL | 1 x 5 mL | 30 x 1.7 mL | 12 x 3 mL | 12 x 2 mL |
| Analytes | d-Amphetamine, d-Methamphetamine, 3, 4-Methylenedioxymethamphetamine (MDMA), Secobarbital, Benzodiazepines, Nordiazepam, Oxazepam, 11-Nor-?-9-THC-9-COOH, Benzoylecgonine, Ethanol (mg/dL), Lysergic Acid Diethylamide (LSD), Methadone, Methaqualone, Morphine (Free), Oxycodone, Phencyclidine (PCP), Propoxyphene, Nortriptyline | Neisseria gonorrhoeae | pCO2, pH, pO2 | Partial list; inquire for comprehensive analyte menu: Basophils (BASO), % Basophils, Eosinophils (EOS), % Eosinophils, Granulocytes (GRAN), Hematocrit (HCT), Hemoglobin (Total), Lymphocytes (LYMPH), % Lymphocytes, Mean Corpuscular Hemoglobin (MCH), Mean Corpuscular Hemoglobin Concentration (MCHC), Mean Corpuscular Volume (MCV), Mean Platelet Volume (MPV), MID, Monocytes (MONO), % Monocytes, Neutrophils (NEUT), % Neutrophils, Nucleated Red Blood Cells (NRBC), Nucleated Red Blood Cells/100 | Cyclosporine, Sirolimus, Everolimus, Tacrolimus |
| Required Equipment | Cross-platform compatible | Cross-platform compatible | Cross-platform compatible | Cross-platform compatible | Cross-platform compatible |
| Format | Liquid | Liquid | Liquid | Liquid | Liquid |
| Get Quote | Supplier Page | Learn More | Supplier Page | Supplier Page | Learn More |