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ASTM-E1207:2009 Edition

ASTM-E1207:2009 Edition

$44.96

E1207-09 Standard Practice for The Sensory Evaluation of Axillary Deodorancy

Published By Publication Date Number of Pages
ASTM 2009 18
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1.1 This guide provides procedures which may be used in the design and analysis of studies to quantitatively assess the intensity of human axillary odor for the purpose of substantiating deodorant efficacy of personal care products.

1.2 This guide includes protocols for the selection and training of assessors, selection of subjects, experimental design, and statistical analyses. This practice is limited to assessment of axillary odor by trained assessors. Self-evaluation protocols are valid for selected sensory tasks but may be less sensitive.

1.3 With respect to the source of axillary odor, three groups of secretory glands are present in the axillae which participate to a greater or lesser extent in its production eccrine, apocrine, and sebaceous. Axillary odor has been primarily ascribed to the apocrine gland secretion (1) . Body odor intensity has been correlated with the volume of the secretory portion of the apocrine gland (2) and the density of the glands.

1.3.1 Apocrine glands are found primarily in the axillary vault in conjunction with axillary hairs (3) . Pure apocrine sweat is sterile and odorless and axillary odor results from degradation of apocrine sweat by resident skin bacteria (4) . High bacterial populations are found in moist regions of the body, especially in the axillae, providing the appropriate environment for growth (5) .

1.3.2 Eccrine glands keep the axillae moist through thermally and emotionally induced secretions (6) .

1.3.3 The sebaceous glands excrete higher molecular weight lipid materials which absorb and retain the volatile materials resulting from bacterial action (7) . The aerobic diphtheroids are able to produce the typical acrid axillary odor and the micrococcaceae produce an isovaleric acid-like odor when incubated with apocrine sweat (8) . Therefore, the most undesirable component of axillary odor is caused by degradation of apocrine sweat by particular bacteria normally found in the axillary vault.

1.4 Personal care products are sold and used primarily for their ability to reduce the perception of body odor not only by the individual using the product but also by individuals within the scope of contact. Deodorant protection may be achieved by these products through various modes of action. Antiperspirants achieve their primary efficacy by means of the action of inorganic salts on the eccrine gland production of sweat. Antimicrobial agents achieve deodorancy by inhibiting the growth and activity of the microflora in the axillary vault thus reducing the microbial decomposition of sweat and the consequent production of body odor. Absorbents function either by binding available moisture or malodorous substances. Fragrances are effective by altering the perception of malodor and increasing the degree of pleasantness. Other modes of control become important from time to time, representing changes in the state-of-the-art in product development.

1.5 The studies discussed herein are interpreted through the use of statistical tests of hypotheses. These hypotheses are usually of the form:

1.5.1 It should be noted that failure to reject this hypothesis at a specified level of significance does not prove the hypothesis, but merely that the weight of evidence provided by the experiment is not sufficient to reject the hypothesis. This could occur because either: a ) The hypothesis is close to truth and great experimental power would be required to reject it, or b ) The experiment by design was low in power and, therefore, incapable of rejecting the hypothesis; even when it is far from true. This can occur due to design structure or low sample size. These facts must be taken into consideration when interpreting study results.

PDF Catalog

PDF Pages PDF Title
1 Scope
Referenced Documents
2 Terminology
Summary of Guide
Significance and Use
Subject Selection and Restrictions
3 Assessor Selection and Training
4 Test Design
5 TABLE 1
6 Biasing Effect of Fragrances
7 X1. SUBJECT ACCEPTANCE/REJECTION HISTORY
X1.1 General
X1.2
X1.3
TABLE X1.1
8 X2. RECOMMENDED PROCEDURE FOR SCREENING AND SELECTING IN VIVO (LIFETIME) DEODORANCY ASSESSORS
X2.1 Purpose
X2.2 Panelist Recruitment
X2.3 Pre-Screening Questionnaire
X2.4 Test Location and Scheduling
X2.5 Phase I
TABLE X1.2
9 X2.6 Phase II
X2.7
X3. IN VIVO DEODORANCY ASSESSOR TRAINING
X3.1 Purpose
X3.2
10 X3.3 Assessor Performance
X4. PRODUCT APPLICATION RECOMMENDATIONS
X4.1 General Application Recommendations
X4.2 Deodorant and Toilet Bar Soap
11 X4.3 Liquid Bath Soaps and Gels
X4.4 Deodorant and Antiperspirant Sticks
X4.5 Deodorant and Antiperspirant Roll-ons, Creams and Lotions
X4.6 Body Talcs
X4.7 Pump and Aerosol Deodorants, Antiperspirants, and Body Colognes
X5. RELATIVE EFFICIENCY OF DESIGNS
X5.1
X5.2
12 X5.3
X5.4
X6. STATISTICAL ANALYSIS OF DEODORANT CLINICAL STUDIES
X6.1
TABLE X5.1
13 X7. STATISTICAL ANALYSIS OF SINGLE PAIR DESIGN
X7.1
14 X8. REPORTING OF AXILLARY DEODORANCY RESULTS
X8.1
X8.2
X8.3
X9. STATISTICAL ANALYSIS OF EACH VERSUS CONTROL DESIGN
X9.1
15 TABLE X9.1
16 X10. STATISTICAL ANALYSIS OF ROUND ROBIN DESIGN
X10.1
X10.2
X11. RESPONSE SURFACE AND FACTORIAL TREATMENT STRUCTURE
X11.1
X11.2
X11.3
X11.4
X11.5
X11.6
X12. FACTORS FOR ENHANCEMENT OF STUDY PRECISION
X12.1
17 REFERENCES

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