Fig. 4From: Quantitative analysis of vitamin D using m/MALDI-TOF mass spectrometry based on a parylene matrix chipReproducibility of the parylene matrix chip. a Spot-to-spot reproducibility of 25(OH)D3. b Spot-to-spot reproducibility of D3. c Shot-to-shot reproducibility of 25(OH)D3. d Shot-to-shot reproducibility of D3Back to article page