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Test definition	LAC2B (933)	LAC2D (714)
Measuring range      mmol/L      mg/L	Standard 0.0444 – 15.55 4 – 1,400	High 0.444 – 155.5(1)  40 – 14,000(1)
Control level	A 1, 2, 3	A 2, 3
Sample predilution	No	1:10
Measuring mode	Absorbance	Absorbance
Abs. calc. mode	Endpoint	Endpoint
Reaction mode	R1-S-SR	R1-S-SR
Reaction direction	Increase	Increase
Wavelength A/B	552/659 nm	552/659 nm
Calc. first/last	33/49	33/49
Unit	mmol/L, mg/L	mmol/L, mg/L

1. Up to 1.55 mol/L (140 g/L) with automatic dilution.

Pipetting parameters	LAC2B (933)	LAC2D (714)
Water Diluent (Sample Predilution)(1)	No	20 μL sample + 180 μL water
R1	125 μL	125 μL
Sample (S)	2 μL + 20 μL water	2 μL + 20 μL water
SR	25 μL + 20 μL water	25 μL + 20 μL water
Total Volume	192 μL	192 μL

1. Sample predilution is performed in a prior step, after which the reaction mix is prepared in the same way as the unmodified sample. 

Calibration
Calibrator	Calibrator A Bio (CAL A, 07-1100-4)
Calibration mode	Linear regression
Calibration interval	Each new lot, and if recalibration is required due to QC results.

• Control A Level 1 Bio (CONA1, 07-1101-2)
• Control A Level 2 Bio (CONA2, 07-1103-9)
• Control A Level 3 Bio (CONA3, 07-1104-7)

• Control A Level 2 Bio (CONA2, 07-1103-9)
• Control A Level 3 Bio (CONA3, 07-1104-7)

Use the recommended control material. Other suitable control material can also be used.
Control intervals and acceptance limits should be adapted to each lab\u00adoratory's individual requirements. If values do not fall within the defined limits, corrective measures and recalibration are required.Conversion factors for lactate concentration:

• 1 g/L = 11.10 mmol/L
• 1 mmol/L = 90.09 mg/L

This method has been standardized against a primary reference material.Representative performance data on Cedex Bio HT Analyzers are shown. Results obtained in individual laboratories may differ. Precision was determined in samples of two concentration levels. Coefficients of variation (CV) were calculated for in-run precision (n=21) and inter-run precision (on 21 days).

	Level 1	Level 2
Mean	1.57 mmol/L (141 mg/L)	3.07 mmol/L (277 mg/L)
CV in-run [%]	0.7	0.8
CV inter-run [%]	1.1	1.1

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• Cedex Bio HT Analyzer*, including accessories and disposables
• Standard laboratory equipment

• Calibrator A Bio*
• Control A Level 1 Bio*
• Control A Level 2 Bio*
• Control A Level 3 Bio*

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Vial	Content	Composition
LAC2B	Reagent cassette, 100 tests	Reagent 1 (R1): Hydrogen donor, 1.75 mmol/L; ascorbate oxidase (cucumber), 501 μkat/L; buffer; preservative.
Start Reagent (SR): 4-aminoantipyrine, 5 mmol/L; lactate oxidase (microbial), 251 μkat/L; peroxidase (horseradish), 401 μkat/L; buffer; preservative.

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