SPDS Draft SMPR - Aloe Vera Quant

DRAFT AOAC SPDS Aloe Vera SMPR, v6, 16 November 2016.  1 2 Quantitation of Aloe Vera Polysaccharides in Dietary Supplements  3 4 Intended Use :  Reference method for cGMP compliance.  5 6 1. Purpose:    AOAC SMPRs describe the minimum recommended performance characteristics  7 to be used during the evaluation of a method.  The evaluation may be an on‐site  8 verification, a single‐laboratory validation, or a multi‐site collaborative study.  SMPRs are  9 written and adopted by AOAC Stakeholder Panels composed of representatives from the  10 industry, regulatory organizations, contract laboratories, test kit manufacturers, and  11 academic institutions.  AOAC SMPRs are used by AOAC Expert Review Panels in their  12 evaluation of validation study data for method being considered for  Performance Tested  13 Methods  or AOAC Official Methods of Analysis , and can be used as acceptance criteria for  14 verification at user laboratories. 

15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

2. Applicability :  

Quantitation of total water soluble Aloe Vera main constituents and degradation products in 

the matrices listed in Table 4. 

3. Analytical Technique :

NMR, GC, Colorimetric, GPC; or any analytical technique that meets the following method  performance requirements is acceptable.  It is expected that more than one technique will 

be required.  

4. Definitions :

Aloe Vera Main Constituents and Degradation Products 

Aloe Vera Polysaccharides  ( Acetylated 1, 4 beta Glucomannan) is the signature component  of Aloe Vera.  Acetic acid is a degradation product of Aloe Vera, quantified as a measure of  the level of de‐acetylation of Aloe Vera polysaccharide (degradation product).  Malic acid is  a necessary component of Aloe Vera.  Lactic acid is a product of malolactic fermentation  (degradation product).  Isocitrate is a marker constituent found exclusively in the plant’s  outer rind and used to identify the anatomical source of the leaf material being examined.  

Limit of Quantitation (LOQ) 

The minimum concentration or mass of analyte in a given matrix that can be reported as a 

quantitative result.   

Repeatability  

Variation arising when all efforts are made to keep conditions constant by using the same  instrument and operator and repeating during a short time period. Expressed as the 

repeatability standard deviation (SD r

); or % repeatability relative standard deviation 

(%RSD r

).* 

Reproducibility 

The standard deviation or relative standard deviation calculated from among‐laboratory 

data. Expressed as the reproducibility standard deviation (SD R

); or % reproducibility relative 

standard deviation (% RSD R

).* 

51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99

Recovery 

The fraction or percentage of spiked analyte that is recovered when the test sample is 

analyzed using the entire method.** 

5. Method Performance Requirements :   

See tables 1 and 2.. 

6. System suitability tests and/or analytical quality control:

Suitable methods will include blank check samples, and check standards at the lowest point 

and midrange point of the analytical range. 

7. Potential Reference Material(s):

Custom Analytics (add Charlie’s info) Low Molecular Weight Pure Polysaccharides (80,000 

daltons) 

Refer to Annex F: Development and Use of In‐House Reference Materials  in Appendix F:  Guidelines for Standard Method Performance Requirements , 19 th  Edition of the AOAC  INTERNATIONAL Official Methods of Analysis (2012).  Available at:  

http://www.eoma.aoac.org/app_f.pdf 

8. Validation Guidance :   

Data demonstrating that the candidate method meets the performance criteria should be  submitted for the adulterants listed in Table 3 and the matrices listed in Table 4.   

Pharmachem Labs may provide materials for evaluation. 

Appendix D: Guidelines for Collaborative Study Procedures To Validate Characteristics of a  Method of Analysis; 19 th  Edition of the AOAC INTERNATIONAL Official Methods of Analysis 

(2012).  Available at:  http://www.eoma.aoac.org/app_d.pdf 

Appendix F:  Guidelines for Standard Method Performance Requirements; 19 th  Edition of the  AOAC INTERNATIONAL Official Methods of Analysis (2012). Available at:  

http://www.eoma.aoac.org/app_f.pdf 

Appendix   K:    Guidelines   for   Dietary   Supplements   and Botanicals, Official Methods of  Analysis  (current edition), AOAC INTERNATIONAL, Rockville, MD, USA (http://www.eoma.  aoac.org/app_k.pdf). Also at:  J. AOAC Int .  95 , 268(2012); DOI: 10.5740/jaoacint.11‐447

9. Maximum Time‐To‐Result:   None

100 101 102

103 104

Table 1: Method performance requirements (part 1). 

Ingredients  (Raw Materials) 

Finished Products ‐ Solid 

Finished Products – Liquid  (Freeze dried samples) 

Parameter 

LOQ  (%) 

≤ 0.5 

≤ 0.5 

≤ 0.15 

Analytical Range (%) 

1 – 100 

1 – 100 

0.15 – 100 

105 106

Table 2: Method performance requirements (part 2). 

Finished Products – Liquid  (Freeze dried samples) 

Ingredients  (Raw Materials)  (1 – 100%) 

Finished Products  – Solid  (1 – 100%) 

Parameter 

0.15 – 0.5%  ≥ 0.5 – 100% 

Recovery (%)  

90 – 110 

90 – 110 

≤ 50 

90 – 110 

% RSD r

≤ 10 

≤ 10 

≤ 20 

≤ 10 

% RSD

≤ 15 

≤ 15 

≤ 30 

≤ 15 

R

107 108 109 110 111 112 113 114

115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133

Table 3:  Potential Adulterants 

Maltodextrin  Carragennan   Gum acacia  Locust gum 

Table 4 : List of Matrices  

Tablets  Capsules   Liquids  Powders  Extracts 

Plant products 

f:\spds\working groups\set 5\aloe vera\smpr\aloe smpr v4.docx