AXIO | Proficiency Testing schemes 2026
Quantity of Matrix
Rounds per Year
Sample Code Matrix
Analytes
PT-CH-56 PT-CH-58
Milk
250ml
Titratable Acidity; FPD
4 4
Yogurt
100g
Energy; Fat; Protein; Salt; Sodium; Total solids; pH; Calcium Energy; Fat; Saturates; Protein; Salt; Sodium; Moisture; pH; Cholesterol; Calcium; Lactose; Ash; Total dietary fibre
PT-CH-59
Soft cheese
100g
4
PT-CH-60 PT-CH-62 PT-CH-63 PT-CH-65 PT-CH-66 PT-CH-67 PT-CH-68 PT-CH-70 PT-CH-71 PT-CH-72 PT-CH-73 PT-CH-74 PT-CH-75 PT-CH-76
Freeze dried milk
25ml
Aflatoxin M1 Aflatoxin M1
1 1
Soft cheese
70g
Cheese powder
100g
Salt; Moisture; pH; Fat; Protein; Ash; Sodium; Colour
2
Milk Powder
50g
Nitrate; Nitrite
2
Condensed milk
100g
Energy; Fat; Saturates; Carbohydrate; Total sugars; Protein; Salt; Sodium; pH
1
Processed cheese Freeze-dried cheese
100g
pH
2 2 4 4 4
2 x 50g 2 x 5ml 2 x 5ml 2 x 5ml
Staphylococcal enterotoxins Antibiotics (beta lactams) Antibiotics (sulphonamides) Antibiotics (tetracyclines)
Freeze dried milk Freeze dried milk Freeze dried milk Grated cheese
25g 10g
Natamycin
1 1 1 1
Infant Formula
Arsenic; Cadmium; Lead, Mercury; Nickel
Liquid infant formula
150-200ml
Density
Infant formula
150g
Fat; Saturates; Carbohydrate; Total sugars; Net carbohydrates; Protein; Salt; Fibre; Chloride, Nitrogen, Choline, Vitamin K1 (cis + trans), Iodine, Non-protein Nitrogen
PT-CH-77 PT-CH-78
Skimmed/non-fat milk
250ml
Protein; Calcium; Total solids; Lactose
1 1
Butter
50g
2,3 butanedione (diacetyl)
Quantity of Matrix
Rounds per Year
Sample Code Matrix
Analytes
ENHANCED PT-CH-42 ENHANCED PT-CH-44 ENHANCED PT-CH-76
Whole milk powder/infant milk powder CH336: Whole milk powder CH342: Infant milk powder
20g
Selenium
2
20g
Vitamin B1; Vitamin B2; Vitamin B6
2
Infant formula
150g
Chloride; Nitrogen; Choline; Vitamin K1 (cis + trans); Iodine; Non-protein Nitrogen
1
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lgcstandards.com/AXIO 37
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