Calcium Assay Kit, BioAssay(TM)

Calcium is measured to monitor diseases of the bone or calcium regulation disorders. Increased calcium levels in serum are reported in hyperparathyroidism, metastatic bone lesions and hypervitaminosis, while decreased levels are observed in hypoparathyroidism, nephrosis, rickets, steatorrhea, nephritis and calcium-losing syndromes. Urinary calcium levels aid the clinician in understanding how the kidneys handle calcium in certain diseases of the parathyroid gland. Urinary calcium levels are also essential in the medical evaluation of kidney stones.\n\nSimple, direct and automation-ready procedures for measuring calcium concentration in biological samples are becoming popular in Research and Drug Discovery. Calcium assay kit is designed to measure calcium directly in biological samples without any pretreatment. A phenolsulphonephthalein dye in the kit forms a very stable blue colored complex specifically with free calcium. The intensity of the color, measured at 612 nm, is directly proportional to the calcium concentration in the sample. The optimized formulation minimizes any interference by substances such as magnesium, lipid, protein and bilirubin.\n\nKey Features:\nSensitive and accurate. Use as little as 5ul samples. Linear detection range 0.08 mg/dL (20uM) to 20 mg/dL (5mM) Ca2+ in 96-well plate assay.\nSimple and high-throughput. The procedure involves addition of a single working reagent and incubation for 3 min. Can be readily automated as a high-throughput assay for thousands of samples per day.\nImproved reagent stability and versatility. The optimized formulation has greatly enhanced reagent and signal stability. Cuvet or 96-well plate assay.\nLow interference in biological samples. No pretreatments are needed. Assays can be directly performed on raw biological samples i.e., in the presence of lipid, protein and minerals such as magnesium, iron and zinc.\n\nApplications:\nDirect Assays: Ca2+ in serum, urine, saliva etc.\nDrug Discovery/Pharmacology: effects of drugs on calcium metabolism.\nFood and Beverages: calcium determination.\nEnvironment: calcium determination in water and soil.\n\nKit Contents: (500 tests in 96-well plates)\nReagent A: 50ml Reagent B: 50ml\nCalcium standard: 1ml 20 mg/dL Ca2+\nStorage conditions. The kit is shipped at room temperature. Store Reagent and Standard at 4 degrees C. Shelf life: 12 months after receipt. Precautions: reagents are for research use only. Normal precautions for laboratory reagents should be exercised while using the reagents. Please refer to Material Safety Data Sheet for detailed information.\n\nProcedures:\nPrepare enough working reagent by combining equal volumes of Reagent A and Reagent B. Equilibrate to room temperature before use.\n\nProcedure using 96-well plate:\n1. Dilute standards as follows. Transfer 5ul diluted standards and samples into wells of a clear bottom 96-well plate. Store diluted standards at 4 degrees C for future use.\nNo STD+H2O Vol (ul) Ca (mg/dL)\n1 100ul+0ul 100 20\n2 80ul+20ul 100 16\n3 60ul+40ul 100 12\n4 40ul+60ul 100 8\n5 30ul+70ul 100 6\n6 20ul+80ul 100 4\n7 10ul+90ul 100 2\n8 0ul+100ul 100 0\n2. Add 200ul working reagent and tap lightly to mix.\n3. Incubate 3 min at room temperature and read optical density at 570-650nm (peak absorbance at 612nm).\n\nProcedure using cuvette:\n1. Set up test tubes for diluted standards and Samples. Transfer 15ul diluted Standards and samples to appropriately labeled tubes.\n2. Add 1000ul working reagent and vortex to mix. Incubate 3 min. Transfer to cuvet and read optical density at 612nm.\n\nCalculation:\nSubtract blank OD (water, #8) from the standard OD values and plot the OD against Ca2+ standard concentrations. Determine the slope using linear regression fitting. Calcium concentration of the sample is calculated as\n\n=\nODSAMPLE

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SPECIFICATIONS

Catalog Number

C0115-89L

Size

1Kit

References

1. Carmela, T.M. et al. (2007). Bactericidal action of daptomycin against stationary-phase and nondividing staphylococcus aureus cells. Antibacterial Agents and Chemotherapy 51 (12): 4255