BLOOD ANALYSIS:

• Amino acids - 1mL freshly frozen plasma
• Total homocystine - 1mL freshly frozen (within 1 hour) plasma
• Very long chain fatty acids and phytanic acid - 1mL freshly frozen plasma (EDTA only)

URINE ANALYSIS:

• Organic acids - 5mL fresh random urine
• Methylmalonic acid - 5mL fresh random urine (part of organic acid screen)
• Amino acids - 5mL fresh random urine
• Reducing substances - 2mL fresh random urine

CSF ANALYSIS:

• Glycine - 0.4mL in plain tube (send with paired plasma sample)
• Lactate - 0.4mL in fluoride oxalate

FAECAL ANALYSIS:

• Reducing substances - freshly frozen