يصنف الفورم ألدهيد من قبل منظمة الصحة العالمية (الوكالة الدولية لبحوث السرطان) كمادة مسرطنة ضمن المجموعة الأولى. يمكن استخدام الفورم ألدهيد كمادة حافظة في المستحضرات التجميلية على ألا تتجاوز نسبته 0.2%. تهدف هذه الدراسة إلى تحري وجود الفورم ألدهيد و تحديد كميته في بعض المستحضرات التجميلية المتوفرة في السوق المحلية باستخدام طريقة الأسيتيل أسيتون. كشفت الدراسة عن وجود الفورم ألدهيد في 77% من المستحضرات التجميلية المدروسة (49 عينة) على الرغم من أن أغلبها (حوالي 70%) غير مصرح باحتوائها عليه أو على مادة حافظة محررة له. أظهرت النتائج اختلاف سويات الفورم ألدهيد في عينات الكيراتين و إن كانت جميعها قد تجاوزت النسبة المئوية المسموحة (%11.73 - %0.34) باستثناء عينة واحدة (0.18%). أدى خفض pH في مستحضرات الكيراتين و رفع درجات الحرارة التي تتعرض لها إلى زيادة نسبة الفورم ألدهيد نتيجة زيادة تحرره من المواد الحافظة المحررة له.
Formaldehyde is classified by the World Health Organization (International Agency
for Research on Cancer) as a carcinogen in Group 1. The upper limit allowed for use in
cosmetic products as a preservative has to not exceed 0.2%. This study aims to detect and
determine formaldehyde level in some cosmetic products available in the local market
using acetyl acetone method. Formaldehyde was detected in 77% of the studied cosmetic
products (49 samples) despite the fact that most of them were not labeled formaldehyde or
formaldehyde donor preservatives (about 70%). The amount of formaldehyde in keratin
samples were higher than the allowed limit (0.34% -11.73%) except one sample 0.18%. pH
decrease and temperature increase of keratin samples led to an increase of formaldehyde
level as a result of its release from preservatives.
References used
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Cole P., Adami H. O., Trichopoulos D., Mandel J., Formaldehyde and lymphohematopoietic cancers: a review of two recent studies. Regul. Toxicol. Pharmacol., Vol. 58, 2010, 161–166
Cole P., Axten C., Formaldehyde and leukemia: an improbable causal relationship. Regul. Toxicol. Pharmacol., Vol. 40, 2004, 107–112
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The concentrations of Copper (Cu) and Zinc (Zn) in samples of some spices
available at some local markets in Syria were determined, after nitric digestion, using
Atomic Absorption Spectrometry. The study showed differences in metal concentrations
The concentrations of copper (Cu) and zinc (Zn) in samples of some cereals available at
local markets in Syria weredetermined, after nitric digestion, using Atomic Absorption
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A sensitive, simple and selective spectrofluorimetric method
has been proposed for determination Captopril (CPT) in pure form
and pharmaceutical preparations. This method depends on the
formation of complex between Captopril and Copper (II) at
pH=3.5.