氢化物发生-非色散原子荧光光谱法测定粉饼化妆品中Pb，As和Hg含量

doi:10.3969/j.issn.2097-2806.2024.09.016

Abstract

Abstract:

This study established and optimized a method for the determination of lead （Pb）, arsenic （As） and mercury （Hg） in 10 powder cosmetics using hydride generation-non-dispersive atomic fluorescence spectrometry （HG-NDAFS）. This study determines that the optimal carrier gas flow rate is 400 mL/min and the optimal shielding gas flow rate is 800 mL/min. The negative high voltage and lamp current are optimized, and the atomizer height is determined to be 8 mm. When optimizing the reductant system, 1.5% is selected as the best KBH₄ solution. The carrying current is 2.4 mol/L HCl. The standard recovery rates of Pb, As, and Hg are 83.44%-90.32%, 83.22%-86.59%, 81.43%-89.94% respectively. The standard recovery rates are good. Among the 10 types of pressed powder, 2 types of pressed powder are detected to contain Pb （0.48 and 0.27 mg/kg）, 1 type of pressed powder contained As （0.62 mg/kg）, and 1 type of pressed powder contained Hg （0.11 mg/kg）. The contents of Pb, As, and Hg in the 10 kinds of powder cosmetics do not exceed the standard. In a word, the HG-NDAFS method established in this study for the determination of Pb, As and Hg in powder cosmetics is accurate and can be used for the determination of Pb, As and Hg in powder cosmetics.

Key words: hydride generation-non-dispersive atomic fluorescence spectrometry, powder, cosmetics, lead, arsenic, mercury

CLC Number:

TQ658

Ping Liu, Lei Cheng. Determination of Pb, As and Hg contents in powder cosmetics by hydride generation-non-dispersive atomic fluorescence spectrometry[J].China Surfactant Detergent & Cosmetics, 2024, 54(9): 1140-1144.

Figures/Tables 6

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References 17

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参数	元素
参数	Pb	As	Hg
负高压/V	290	290	290
灯电流/mA	70	70	30
载气流速/（mL/min）	400	400	400
屏蔽气流速/（mL/min）	800	800	800
原子化器高度/mm	8	8	8
读数时间/s	16	8	8
延迟时间/s	8	2	2

元素	线性方程	R²	线性范围/（μg/L）	检出限/（μg/L）
Pb	y=224.76x-18.96	0.998 1	0~16.0	0.061
As	y=267.57x+107.92	0.997 3	0~16.0	0.335
Hg	y=1 124.26x+2.03	0.999 1	0~1.60	0.036

元素	ρ_加标/（μg/L）	ρ_测量/（μg/L）	回收率/%
Pb	1.0	0.851 940	85.19
	2.0	1.806 341	90.32
	8.0	6.675 097	83.44
As	1.0	0.832 224	83.22
	2.0	1.731 711	86.59
	8.0	6.860 001	85.75
Hg	0.1	0.081 433	81.43
	0.2	0.170 366	85.18
	0.8	0.719 557	89.94

样品	含量/（mg/kg）
样品	Pb	As	Hg
粉饼1	－	－	－
粉饼2	－	－	－
粉饼3	－	－	－
粉饼4	0.48	－	－
粉饼5	－	－	－
粉饼6	－	0.62	－
粉饼7	－	－	－
粉饼8	0.27	－	－
粉饼9	－	－	0.11
粉饼10	－	－	－

Determination of Pb, As and Hg contents in powder cosmetics by hydride generation-non-dispersive atomic fluorescence spectrometry

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