Codex STAN 234 Working Group-Method Reviews 1-23-18
AOAC INTERNATIONAL OMB WORKING GROUP (Codex STAN 234)
Method Reviews January 19, 2018
First Name Last Name
1. Method #
2. Review Status
3. Provision
4. Principle
5. Type
6. Choose Commodity
7. Does the commodity
If yes, include range from standard
8. Does the method include the commodity in the field of application?
8a. Please provide information on the commodity in the field of application
9. Is the method information accurate?
9a. Please provide the accurate/detailed information
10. Is the method fit for purpose to measure the provision as listed in the commodity standard?
10a. Please provide information
11. Is the method fit for purpose according to technical evaluation?
11a. Please provide information on technical evaluation
12.Please provide final recommendation
Comments:
standard give ranges for the provision?
Hans
Cruijsen
AOAC 920.116
WG Process Check
Milk solids‐not‐fat (MSNF)
Gravimetry
I
Creams, Whipped Creams and Fermented Creams
No
No
there seems to be some messing up here…the provision is MSNF which coincides with ISO 3727‐ 2|IDF 80‐2;AOAC 920.116 is not for MSNF but for moisture which coincides with ISO 3727‐1|IDF‐80‐ 1. It appears to me that AOAC 920.116 should therefore not be listed here but on other page with the determination of water16) in butter. No The scope of the method is moisture in butter although when in combination with 938.06 the provision of milk solids‐not‐fat could be determined.
In principle temperature is given as "boiling temp of water" should be given as 102 +/‐ 2 degrees C. No
there seems to be some messing up here…the provision is MSNF which coincides with ISO 3727‐ 2|IDF 80‐2;AOAC 920.116 is not for MSNF but for moisture which coincides with ISO 3727‐1|IDF‐80‐ 1. It appears to me that AOAC 920.116 should therefore not be listed here but on other page with the determination of water16) in butter. No The method may be fit for purpose but doesn't appear to have been validated for cream No
No validation reference is given in AOAC 920.116; in ISO 3727‐1 IDF 80‐1 validation data are given (could be used as reference.
Additional review needed
AOAC 920.116 is given as IDF‐ISO‐AOAC method. Advise to update AOAC 920.116 with reference to IDF‐ISO method.
Jaap
Evers
AOAC 920.116
WG Process Check
Milk solids‐not‐fat (MSNF)
Gravimetry
I
Creams, Whipped Creams and Fermented Creams
No
No
Yes
No
No validation provided and the product is outside the stated scope of the method.
Major change
The scope needs to be aligned with the commodity, provision and should be validated as it's a defining method. Alternatively remove as ISO 3727‐2|IDF 80‐2 is already correctly aligned to the provision although not the commodity.
Roberto Galluzzo AOAC 920.116
WG Process Check
Other
Gravimetry
I
Milk products
No
Yes
Yes
Yes
Yes
No change
Roberto Galluzzo AOAC 938.06
WG Process Check
Other
Gravimetry
I
Milk products
No
Yes
Yes
Yes
Yes
No change
Hans
Cruijsen
AOAC 960.40
WG Process Check
Copper
Atomic absorption spectrophotometry
II
Milk products
No
Yes
Yes
Yes
No
validation data in AOAC 96.40 as presented in booklet do not met general requirements on validation (no exact data on repeatability, reproducibility, accuracy). However in ISO 5738 | IDF 76 using the same method precision data are given according to current requirements. So the method will work , however technical information is not available in required way and not documented.
No change
Although the method is old fashioned and hardly used, method is option at this time. However advise to start later in 2018 process to change method to AOAC 2015.06 using ICP‐MS in conjunction with ISO/IDF
Brendon Gill
AOAC 960.40
WG Process Check
Copper
Titrimetry (Kjeldahl)
II
Milk products
No
No
Method using a range of different foods, but milk products were not included in validation. Infant formula was but this covered under different commodity.
Yes
Yes
Yes
Remove
Techniques such as this one have been superseded by newer analytical techniques particularly as ICP‐MS or ICP‐OES which are much more sensitive and less prone to inferences. AOAC methods that could replace AOAC 982.23 are: AOAC 999.11: Lead, Cadmium, Copper, Iron, and Zinc in Foods Atomic Absorption Spectrophotometry AOAC 2011.14: Calcium, Copper, Iron, Magnesium, Manganese, Potassium, Phosphorus, Sodium, and Zinc in Fortified Food Products by Microwave Digestion and Inductively Coupled Plasma‐Optical Emission Spectrometry
WG Process Check
Milk Fat
Gravimetry
II
Milk products
Yes
252‐2006
Yes
Yes
Yes
Yes
No change
Deb
McKenzie AOAC 972.25 (Codex general method)
Hans
Cruijsen
AOAC 982.23
WG Process Check
Lead
Gravimetry
III
Other
No
No
Edible casein products were not part of Method using Anodic stripping voltammetry (and not gravimetry)
Yes
Yes
No
In 2012 a new SMPR 2012.007 is made for heavy metals in general food included lead. AOAC 982.23 specificity is doubtful. Interference from Sn may take place at high Sn concentrations. LOQ for lead is 10 ppm which is Ok for edible caseinates. Repeatability and reproducibility is mostly according SMPR , but not in all products.
No change
Although the method is old fashioned and hardly used, method is option at this time. However when First action method using ICP‐MS becomes final action. than to be replaced.
Brendon Gill
AOAC 982.23
WG Process Check
Lead
Titrimetry (Kjeldahl)
II
Milk products
No
No
Method includes range of foods in validation but only milk product is infant formula which is covered under different commodity than milk products.
Yes
Yes
Yes
Remove
Techniques such as this one have been superseded by newer analytical techniques particularly as ICP‐MS or ICP‐OES which are much more sensitive and less prone to inferences. AOAC methods that could replace 982.23 are: AOAC 999.11 Lead, Cadmium, Copper, Iron, and Zinc in Foods Atomic Absorption Spectrophotometry Currently there are no AOAC Official Methods utilising ICP‐OES or ICP‐MS for foods, especially milk and milk products, there are methods for infant formula 2015.06 which may be extended in scope in future.
Hans
Cruijsen
AOAC 991.20
WG Process Check
Milk protein in MSNF
Titrimetry (Kjeldahl)
IV
Reduced fat blend of sweetened condensed skimmed milk and vegetable fat
Yes
Several
No
The method is applicable to milk, although the Kjeldahl method can be used in broader scope
Yes
Yes
No
commodities: Reduced fat blend of skimmed milk powder and vegetable fat in powdered form; Blend of sweetened condensed skimmed milk and vegetable fat;Reduced fat blend of sweetened condensed skimmed milk and vegetable fat;Reduced fat blend of evaporated skimmed milk and vegetable fat were not part of validation The composition of the commodity is outside the scope of 991.20. Without product specific digestion optimisation there is a risk of under recovery of nitrogen (protein)
No change
No change, was already discussed in CCMAS
Yes
No
The provision is for milk protein in MSNF. Neither AOAC 991.20 or the ISO|IDF standard listed for the same provision are suitable without combining with the separate MSNF methods stated. No
Remove
Whilst the product is not within the validation of ISO 8968‐1|IDF 20‐1 either that methods requirement to optimise the digestion for the sample type to be tested means it is likely to be more robust. As some automated equipment include an integrated titration system using a potentiometric endpoint detection (instead of colorimetric) I would be interested in knowing the opinion of other assessors about this variant.
Jaap
Evers
AOAC 991.20
WG Process Check
Milk protein in MSNF
Titrimetry (Kjeldahl)
IV
Reduced fat blend of sweetened condensed skimmed milk and vegetable fat
Yes
250‐2006
No
This Standard applies to a blend of evaporated skimmed milk and vegetable fat, also known as a blend of unsweetened condensed skimmed milk and vegetable fat, which is intended for direct consumption or further
Roberto Galluzzo AOAC 991.20
WG Process Check
Other
Titrimetry (Kjeldahl)
I
Other
No
Yes
Yes
Yes
Yes
No change
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