Development of 9 Kinds of Plant Matrix Reference Materials for Elemental Analysis and Quantitative Characteristics
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摘要:
随着人们对食品安全关注度的提升，尤其是对植物源食品和保健品的元素组成与功效的关注，对评价可食性植物中元素分析标准物质需求日益增加。本文研制了红豆粉无机成分分析标准物质(GBW10228)、洋葱成分分析标准物质(GBW10232)、油菜成分分析标准物质(GBW10233)、金针菇粉中元素成分分析标准物质(GBW10247)、银耳粉中元素成分分析标准物质(GBW10248)、藕粉中元素成分分析标准物质(GBW10249)、山楂粉中元素成分分析标准物质(GBW10250)、三七粉中元素成分分析标准物质(GBW10251)、茉莉花成分分析标准物质(GBW10234)共9种植物基体分析标准物质。针对物料特点确定了候选物的采集地点、制备方法、封装工艺和保存条件，经检验均匀性、稳定性良好，通过方法研究制定了标准物质定值作业指导书，由11家实验室联合对Ag、Al、As、B、Ba、Be、Bi、Br、Ca、Cd、Ce、Cl、Co、Cr、Cs、Cu、Dy、Er、Eu、F、Fe、Gd、Ge、Hg、Ho、I、K、La、Li、Lu、Mg、Mn、Mo、N、Na、Nd、Ni、P、Pb、Pr、Rb、S、Sb、Sc、Se、Si、Sm、Sn、Sr、Tb、Th、Ti、Tl、Tm、U、V、Y、Yb、Zn共59种元素测试，定值测试针对不同的元素选用受基体影响小的准确灵敏的方法，主要有电感耦合等离子体质谱法、电感耦合等离子体发射光谱法、原子荧光光谱法、容量法等，定为标准值的元素均在40种以上，其中山楂和三七给出53种标准值及不确定度，元素分布特征明显，代表性强。与同类标准物质相比，痕量元素定值水平有所提高，常规抽检重点监测的元素Cd和Pb，在红豆、洋葱、金针菇、油菜、三七、茉莉花中形成梯度含量，如Cd的含量在10-9到10-7量级，Pb含量在10-8到10-6量级，对于食品检测质量监控其适用性更广。本系列标准物质定值元素种类丰富，适用于生物类样品测试的量值传递和质量监控，也为保健品的药用价值与元素关联性研究提供了基础数据。
要点(1) 研制了红豆、洋葱、油菜、金针菇、银耳、藕粉、山楂、三七和茉莉花等9种标准物质。
(2) 定值元素59种，与同类标准物质相比，痕量元素定值水平有所提高。
(3) 系列标准物质中Cd和Pb的含量形成梯度，可用于分析检测中不同含量的样本测试。
HIGHLIGHTS(1) 9 kinds of reference materials were developed: red bean, onion, rape, needle mushroom, tremella, root starch, hawthorn, notoginseng and jasmine.
(2) 59 elements are certificated, and trace element quantification levels are improved compared to standard materials of the same type.
(3) The contents of Cd and Pb in the series of reference materials form a gradient, which can be used for the analysis of samples with different contents.
Abstract:BACKGROUNDWith the increasing concern for food safety, especially for the elemental composition and efficacy of plant-derived foods and health products, research on the nutrient analysis of related foods is continuously carried out. At present, due to the wide variety of agricultural and health products, and the different environments in which the plant matrix grows, the elements absorbed by plants during the growth process vary greatly, making it difficult for many foods to meet the requirements of the calibration and testing system simply by using pure standards. It is necessary to combine the matrix reference materials for calibration and develop new plant-based reference materials.
OBJECTIVESTo improve the situation that there are few existing plant matrix reference materials, by developing 9 kinds of plant matrix reference materials for elemental analysis. Except for the reference materials for elemental analysis in notoginseng powder, all of them were developed for the first time, which supplemented the types of plant matrix elemental analysis reference materials and were mainly used in food nutrition and safety analysis and testing technology research of plant samples.
METHODSIn the early stage of development, the selection of candidate reference materials with the representative matrix were investigated and studied. The samples were pretreated, dried, crushed, sieved, and examined by a laser particle size analyzer before being packed in 45mL HDPE plastic bottles and inactivated by 60Co irradiation, which can be stored for a certain period of time. The samples were randomly selected from 30 bottles during the whole packing process, and the homogeneity test was performed by inductively coupled plasma-mass spectrometry (ICP-MS), inductively coupled plasma-optical emission spectrometry (ICP-OES), atomic fluorescence spectrometry (AFS) and volumetric method (VOL). The long-term stability of the reference materials under the specified storage conditions and the transport stability at 60℃ were investigated and the results were evaluated by trend analysis, which showed that the samples were stable under the specified conditions. The operation guideline of reference materials characterization analysis was developed, and 11 laboratories worked together to analyze 59 elements: Ag, Al, As, B, Ba, Be, Bi, Br, Ca, Cd, Ce, Cl, Co, Cr, Cs, Cu, Dy, Er, Eu, F, Fe, Gd, Ge, Hg, Ho, I, K, La, Li, Lu, Mg, Mn, Mo, N, Na, Nd, Ni, P, Pb, Pr, Rb, S, Sb, Sc, Se, Si, Sm, Sn, Sr, Tb, Th, Ti, Tl, Tm, U, V, Y, Yb, Zn.
RESULTSThe data of the developed series of reference materials were statistically judged by Grubbs and Dixon and the suspicious values were rejected, with a rejection rate of less than 3%. Shapiro-Wilk was used to test the normality of the fixed value data, in which the element Ti in red bean, Bi, I and Th in needle mushroom, Ti in tremella, and I in jasmine had a skewed distribution of the original measurement data, and no certified value was taken only as the median value for reference, and the arithmetic mean of the customized data was used as the certified value for the remaining elements. The certified values and uncertainties of the nine reference materials were above 40, among which, 53 certified values and uncertainties were given for hawthorn and notoginseng. The uncertainty of reference materials consists of homogeneity uncertainty, stability uncertainty and characterization uncertainty. This series of reference materials was developed under the concept of metrological traceability, and a variety of quality control measures were taken to ensure the accuracy and reliability of analytical results and was applied as national level reference materials in 2021. The names and number are as follows: chemical composition of red bean (GBW10228), onion (GBW10232), rape (GBW10233), needle mushroom (GBW10247), tremella (GBW10248), root starch (GBW10249), hawthorn (GBW10250), notoginseng (GBW10251), and jasmine (GBW10234).
The existing plant matrix elemental analysis reference materials are mostly found in rice, wheat, tea and other major agricultural and sideline food, and the certified value elements are mainly macronutrients and heavy metals. The present series of reference materials cover agricultural and health products with a large amount of daily sampling, except for notoginseng, which is developed for the first time, supplementing the variety of relevant quality control samples in the food testing field, with 59 certified value elements, which can effectively reflect the composition of elements in relevant products.
In this study, more regionally representative candidates were selected, focusing on the beneficial nutritional elements K, Ca, Na, Mg, P, Zn, Fe and harmful metal elements As, Hg, Cd, Pb, whose contents can reflect the distribution characteristics of the elements in different samples and origins, such as red beans, which is a health food, and the candidates were picked from Yi'an County in Songnen Plain (one of the important commodity grain bases in China). It contains high contents of beneficial nutrients such as K (1.392g/100g), Ca (0.104g/100g), Mg (0.165g/100g), P (0.457g/100g), Zn (24μg/g) and Fe (71μg/g), and low contents of Pb (0.033μg/g), Cd (5.4ng/g) and other harmful metal elements, which are far below the national limit standards, reflecting the fertile black soil of Songnen Plain and the effectiveness of China's land management. For elements of Cd and Pb, red beans (5.4ng/g) and (0.033μg/g), onions (17ng/g) and (0.322μg/g), needle mushroom (33ng/g) and (0.126μg/g), rape (170ng/g) and (0.9μg/g), notoginseng (311ng/g) and (0.7μg/g), jasmine (420ng/g) and (1.65μg/g) form a gradient range, which is more applicable for food testing quality control. It can be found that the content of heavy metals in health products such as notoginseng and jasmine are higher than that in vegetable products such as rape and needle mushroom, which has a certain guidance for selecting suitable quality control samples in analytical testing. This is a guideline for the selection of suitable quality control samples.
Due to the progress of the current testing methods and instruments, the precision of the data for the determination of rare earths and other elements with very low contents in some samples was good, and standard values were given, such as Eu (9.4±1.7ng/g), Ge (7.8±2.3ng/g), Lu (1.7±0.5ng/g), Tb (5.3±0.9ng/g), Tm (1.8±0.6ng/g) in rape, while the previous reference materials of similar vegetable matrixes did not reach such definite levels.
CONCLUSIONSThe development of the series of plant matrix reference materials is supplemental and improves the existing plant matrix reference materials, with obvious distribution characteristics of elements and wide applicability of the gradient range. This series of reference substances covers lots of elements with certified values, which is suitable for the quantity transfer and quality control of biological samples analysis and provides basis for the research on the correlation between the medicinal value and elements of health products.
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致谢: 本研究是在中国地质科学院地球物理地球化学勘查研究所顾铁新教授级高级工程师指导下完成的，在此向指导老师以及团队的同事致以衷心感谢和深深敬意。同时，对参与本系列标准物质定值工作的实验室的大力支持和帮助表示衷心感谢！
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图 1 候选物样品加工制备流程示意图
Figure 1. Schematic diagram of candidate material sample processing and preparation.
表 1 候选物定值元素分析测试方法汇总
Table 1 Sample decomposition methods and analytical methods for candidate reference materials
定值元素 分析测试方法 定值元素 分析测试方法 Ag MW-ICP-MS，DFC-ICP-MS，DAC-ICP-MS，MW-ICP-OES Mg MW-ICP-OES，DFC-ICP-MS，DAC-ICP-OES，DMA-ICP-OES，DAC-ICP-MS Al MW-ICP-OES，DMA-ICP-OES，A.FU-ICP-OES，FU-ICP-OES，DAC-ICP-OES，DPP-XRF Mn MW-ICP-OES，DFC-ICP-MS，DAC-ICP-OES，DAC-ICP-MS，MW-ICP-MS As DMA-AFS，DMA-ICP-MS，DAC-ICP-MS，MW-ICP-MS，DAC-AFS Mo MW-ICP-MS，DFC-ICP-MS，DAC-ICP-MS B MW-ICP-OES，DFC-ICP-MS，DAC-ICP-MS，MW-ICP-MS N DS-VOL，DS-COL Ba MW-ICP-OES，DFC-ICP-MS，DAC-ICP-ES，MW-ICP-MS，DAC-ICP-OES，DAC-ICP-MS Na MW-ICP-OES，DFC-ICP-MS，DAC-ICP-OES，DMA-ICP-OES，DAC-ICP-MS Be MW-ICP-OES，DFC-ICP-MS，DAC-ICP-MS，MW-ICP-MS Nd MW-ICP-MS，DFC-ICP-MS，DA-ICP-MS，DAC-ICP-MS Bi MW-ICP-MS，DAC-ICP-MS，DF-AFS Ni MW-ICP-MS，DFC-ICP-MS，DAC-ICP-MS，MW-ICP-OES Br DAC-ICP-MS，DPP-XRF，FU-ICP-MS P MW-ICP-OES，DFC-ICP-MS，DAC-ICP-OES，DMA-ICP-OES，DAC-ICP-MS Ca MW-ICP-OES，DFC-ICP-MS，DAC-ICP-OES，DMA-ICP-OES，DAC-ICP-MS Pb MW-ICP-MS，DFC-ICP-MS，DAC-ICP-MS Cd MW-ICP-MS，DFC-ICP-MS，DAC-ICP-MS Pr MW-ICP-MS，DFC-ICP-MS，DA-ICP-MS，DAC-ICP-MS Ce MW-ICP-MS，DFC-ICP-MS，DA-ICP-MS，DAC-ICP-MS Rb MW-ICP-MS，DFC-ICP-MS，DAC-ICP-MS Cl DPP-XRF，BTVOL S MW-ICP-OES，DFC-ICP-MS，DAC-ICP-OES，DAC-ICP-MS Co MW-ICP-MS，DFC-ICP-MS，DAC-ICP-MS Sb DW-AFS，DAC-ICP-MS，MW-ICP-MS Cr MW-ICP-OES，DFC-ICP-MS，DAC-ICP-MS，MW-ICP-MS，DAC-ICP-OES Sc MW-ICP-MS，DFC-ICP-MS，DA-ICP-MS Cs MW-ICP-MS，DFC-ICP-MS，DAC-ICP-MS Se DMA-AFS，DAC-AFS，MW-ICP-MS，MW-AFS，DAC-ICP-MS，DF-AFS Cu MW-ICP-MS，DFC-ICP-MS，DAC-ICP-MS，MW-ICP-OES Si DMA-ICP-OES，A.FU-ICP-OES，FU-ICP-OES，DAC-ICP-OES，DPP-XRF Dy MW-ICP-MS，DFC-ICP-MS，DA-ICP-MS，DAC-ICP-MS Sm MW-ICP-MS，DFC-ICP-MS，DA-ICP-MS，DAC-ICP-MS Er MW-ICP-MS，DFC-ICP-MS，DA-ICP-MS，DAC-ICP-MS Sn MW-ICP-MS，DFC-ICP-MS，DAC-ICP-MS Eu MW-ICP-MS，DFC-ICP-MS，DA-ICP-MS，DAC-ICP-MS Sr MW-ICP-OES，DFC-ICP-MS，DAC-ICP-OES，MW-ICP-MS，DAC-ICP-MS F DACL-ISE，DD-COL Tb MW-ICP-MS，DFC-ICP-MS，DA-ICP-MS，DAC-ICP-MS Fe MW-ICP-OES，DFC-ICP-MS，DAC-ICP-OES，DAC-ICP-MS，DMA-ICP-OES Th MW-ICP-MS，DFC-ICP-MS，DAC-ICP-MS Gd MW-ICP-MS，DFC-ICP-MS，DA-ICP-MS，DAC-ICP-MS Ti MW-ICP-OES，DFC-ICP-MS，DAC-ICP-MS，MW-ICP-MS，DAC-ICP-OES，DMA-ICP-OES Ge MW-ICP-MS，DFC-ICP-MS，DAC-ICP-MS Tl MW-ICP-MS，DFC-ICP-MS，DAC-ICP-MS Hg MW-AFS，DAC-AFS，DAC-ICP-MS，MW-ICP-MS，DA-AFS，DF-AFS Tm MW-ICP-MS，DA-ICP-MS，DAC-ICP-MS Ho DFC-ICP-MS，DA-ICP-MS，MW-ICP-MS，DAC-ICP-MS U DFC-ICP-MS，DAC-ICP-MS，MW-ICP-MS I DAC-ICP-MS，FU-ICP-MS，MW-ICP-MS，A.FU-COL V MW-ICP-MS，DFC-ICP-MS，DAC-ICP-MS K MW-ICP-OES，DFC-ICP-MS，DAC-ICP-OES，DMA-ICP-OES，DAC-ICP-MS Y MW-ICP-MS，DFC-ICP-MS，DA-ICP-MS，DAC-ICP-MS La MW-ICP-MS，DFC-ICP-MS，DA-ICP-MS，DAC-ICP-MS Yb MW-ICP-MS，DFC-ICP-MS，DA-ICP-MS，DAC-ICP-MS Li MW-ICP-MS，DFC-ICP-MS，DAC-ICP-MS Zn MW-ICP-MS，MW-ICP-OES，DFC-ICP-MS，DAC-ICP-OES，DAC-ICP-MS Lu MW-ICP-MS，DFC-ICP-MS，DA-ICP-MS，DAC-ICP-MS 注：前处理方法：MW—微波消解；DFC—混合酸加少量氢氟酸密闭分解；DAC—硝酸加过氧化氢或王水或高氯酸密闭压力分解；DMA—混合酸(硝酸加高氯酸，或加硫酸，或加过氧化氢)分解；A.FU—灰化后熔融分解；FU—碱熔或艾斯卡熔矿(碳酸钠、氧化锌烧结)；DPP—粉末压片；DF—混合酸加少许氢氟酸分解；DA—王水或硝酸加过氧化氢分解；DACl—稀盐酸浸提；DD—扩散法；DS—催化蒸馏(过氧化氢、硫酸铜、硫酸钾、硫酸)；DW—水浴消解法。
检测方法：ICP-MS—电感耦合等离子体质谱法；ICP-OES—电感耦合等离子体发射光谱法；XRF—X射线荧光光谱法；AFS—原子荧光光谱法；BTVOL—返滴定法；VOL—容量法；COL—分光光度法；ISE—离子选择电极法。
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表 2 候选物测试和剔除数据组数统计
Table 2 Summary of test data and rejected data groups for candidate reference materials
候选物名称 定值数据组数 剔除数据组数 数据剔除率
(%)红豆 3247 86 2.6 洋葱 3318 76 2.3 油菜 3332 56 1.7 金针菇 3264 87 2.7 银耳 3264 74 2.3 藕粉 3243 82 2.5 山楂 3280 60 1.8 三七 3256 74 2.3 茉莉花 3317 87 2.6
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表 3 标准物质标准值和不确定度
Table 3 Certified values and expanded uncertainty for reference materials
标准物质名称和编号 元素 标准值和不确定度
(×10-6)元素 标准值和不确定度
(×10-6)元素 标准值和不确定度
(×10-6)元素 标准值和不确定度
(×10-6)红豆粉无机成分分析标准物质
(GBW10228)Ag** (1.1) Cu 8.2±0.6 Mg* 0.165±0.010 Si (100) Al (136) Dy** 1.8±0.3 Mn 22.1±1.0 Sm** 2.5±0.5 As 0.017±0.006 Er** (0.97) Mo 1.13±0.08 Sn (0.03) B 12.7±1.3 Eu** 1.5±0.5 N* 3.12±0.11 Sr 6.6±0.5 Ba 5.4±0.6 F (0.75) Na (10) Tb** 0.4±0.1 Be** 2.1±0.4 Fe 71±8 Nd 0.012±0.004 Th** (5.4) Bi** (0.93) Gd 2.7±0.5 Ni 10±1 Ti (3.13▲) Br (1.9) Ge** (1.2) P* 0.457±0.013 Tl** 6.1±1.4 Ca* 0.104±0.014 Hg** (1.27) Pb 0.033±0.014 Tm** 0.13±0.05 Cd** 5.4±0.9 Ho** 0.37±0.07 Pr** 3.2±0.7 U** 1.2±0.5 Ce 0.030±0.006 I** (116) Rb 11±1 V (0.06) Cl (126) K* 1.392±0.073 S* 0.180±0.017 Y 0.3±0.1 Co 0.23±0.04 La 0.026±0.004 Sb** (4.6) Yb** 0.76±0.10 Cr (0.93) Li 0.03±0.01 Sc 0.013±0.006 Zn 24±2 Cs 0.025±0.004 Lu** 0.10±0.03 Se 0.023±0.009 洋葱成分分析标准物质
(GBW10232)Ag** 4±1 Cu 7.2±1.1 Mg* 0.12±0.01 Si* (1.595) Al (289) Dy** 9.1±2.2 Mn 10.1±1.6 Sm (0.012) As 0.104±0.043 Er** 4.7±1.0 Mo 0.222±0.026 Sn 0.054±0.010 B 11.1±1.6 Eu** 3.5±0.7 N* 1.733±0.206 Sr 27±6 Ba 7.44±0.60 F (0.99) Na* 0.074±0.011 Tb** 1.6±0.4 Be** 5.1±1.4 Fe 107±11 Nd 0.058±0.012 Th 0.032±0.011 Bi** 2.1±0.7 Gd 0.011±0.005 Ni 1.04±0.46 Ti 10.7±2.5 Br (1.7) Ge** 7±2 P* 0.302±0.077 Tl** 3.36±1.07 Ca* 0.30±0.03 Hg** 2.6±0.9 Pb 0.322±0.093 Tm** 0.63±0.23 Cd 0.017±0.006 Ho** 1.7±0.4 Pr 0.015±0.006 U 0.019±0.006 Ce 0.126±0.015 I (0.22) Rb 5.0±0.6 V 0.21±0.10 Cl* (0.098) K* 1.14±0.12 S* 0.53±0.10 Y 0.14±0.03 Co 0.062±0.011 La 0.075±0.011 Sb (0.015) Yb** 4.2±1.6 Cr 1.68±0.49 Li 0.16±0.04 Sc (0.10) Zn 18±2 Cs 0.015±0.006 Lu** 0.65±0.20 Se 0.04±0.01 油菜成分分析标准物质
(GBW10233)Ag** 4.4±1.0 Cu 2.72±0.62 Mg* 0.185±0.014 Si* (0.19) Al (447) Dy 0.03±0.01 Mn 30±4 Sm 0.045±0.016 As 0.16±0.03 Er 0.013±0.006 Mo 0.44±0.04 Sn 0.032±0.013 B 14.3±2.8 Eu** 9.7±1.4 N* 2.05±0.09 Sr 74±12 Ba 11.1±1.6 F 3.84± Na* 0.48±0.06 Tb** 5.3±0.9 Be** 9.7±1.4 Fe 267±39 Nd 0.23±0.11 Th 0.074±0.018 Bi** 6.5±1.2 Gd 0.040±0.013 Ni 1.26±0.30 Ti 22±3 Br (5.1) Ge** 7.8±2.3 P* 0.266±0.034 Tl 0.010±0.004 Ca* 0.86±0.08 Hg** 8±2 Pb 0.9±0.2 Tm** 1.8±0.6 Cd 0.17±0.03 Ho** 5±2 Pr 0.06±0.01 U 0.097±0.023 Ce 0.51±0.14 I (0.26) Rb 9±1 V 0.55±0.15 Cl* (0.63) K* 1.08±0.09 S* 0.31±0.07 Y 0.23±0.09 Co 0.13±0.03 La 0.27±0.07 Sb (0.017) Yb 0.011±0.005 Cr 3.6±0.6 Li 0.43±0.09 Sc (0.09) Zn 17±2 Cs 0.11±0.01 Lu** 1.7±0.5 Se 0.045±0.019 金针菇粉中元素成分分析标准物质
(GBW10247)Ag 0.019±0.004 Cu 6.8±0.6 Mg* 0.154±0.011 Si (441) Al* 0.017±0.006 Dy** 8.2±1.1 Mn 6±1 Sm** 11±2 As 0.25±0.03 Er** 4.2±0.5 Mo 0.049±0.012 Sn 0.024±0.009 B 7±1 Eu** 2.6±0.6 N* 2.48±0.06 Sr 2.8±0.3 Ba 1.5±0.3 F (1.95) Na 325±35 Tb** 1.43±0.18 Be** 5.1±1.7 Fe 174±14 Nd 0.06±0.01 Th 0.018▲(0.015~0.033) Bi** (1.9▲) Gd** 10.3±1.3 Ni 0.31±0.03 Ti (12) Br (5.6) Ge** 5.0±1.3 P* 0.493±0.032 Tl** 1.45±0.42 Ca 597±25 Hg 0.052±0.012 Pb 0.126±0.021 Tm** 0.58±0.11 Cd 0.033±0.006 Ho** 1.7±0.3 Pr 0.014±0.005 U** 7±2 Ce 0.117±0.015 I (0.3▲) Rb 16±1 V 0.24±0.03 Cl* (0.116) K* 2.89±0.23 S* 0.177±0.016 Y 0.15±0.03 Co 0.05±0.01 La 0.07±0.01 Sb 0.014±0.006 Yb** 3.5±0.4 Cr 0.75±0.10 Li 0.37±0.03 Sc (0.026) Zn 53±7 Cs 0.06±0.01 Lu** 0.6±0.1 Se 0.088±0.016 银耳粉中元素成分分析标准物质
(GBW10248)Ag** 2.8±0.5 Cu 0.8±0.1 Mg 313±18 Si* (0.019) Al (113) Dy** 1.8±0.3 Mn 3.1±0.3 Sm** 2.1±0.3 As 0.08±0.02 Er** 1.0±0.2 Mo 0.141±0.012 Sn (0.017) B 2.0±0.3 Eu** 0.55±0.12 N* 0.93±0.08 Sr 1.63±0.24 Ba 0.85±0.10 F (1.5) Na 418±32 Tb** 0.35±0.12 Be** 1.4±0.2 Fe 19±2 Nd 0.012±0.005 Th** 3.3±1.0 Bi** (0.8) Gd** 2.3±0.3 Ni 0.08±0.02 Ti (0.65▲) Br (2.3) Ge** 1.23±0.18 P* 0.225±0.023 Tl** 0.35±0.14 Ca 227±20 Hg** (3.3) Pb 0.041±0.011 Tm** 0.16±0.04 Cd 0.032±0.007 Ho** 0.42±0.17 Pr** 3.2±0.5 U** 2.1±0.6 Ce 0.018±0.006 I (0.27) Rb 8±1 V (0.030) Cl* (0.043) K* 1.08±0.08 S 722±53 Y 0.23±0.08 Co** 7±2 La 0.022±0.008 Sb** 5±2 Yb** 0.92±0.21 Cr (0.2) Li 0.14±0.02 Sc** (7) Zn 17±2 Cs 0.048±0.006 Lu** 0.17±0.04 Se 0.026±0.010 藕粉中元素成分分析标准物质
(GBW10249)Ag** 2.5 ±0.9 Cu 1.92±0.22 Mg 297±18 Si (62) Al (98) Dy** 0.53±0.18 Mn 13.4±1.5 Sm** 0.72±0.11 As 0.11±0.02 Er** 0.3±0.1 Mo 0.34±0.03 Sn** (10.1) B 2.0±0.3 Eu** 0.43±0.14 N* 0.91±0.08 Sr 3.3±0.2 Ba 1.3±0.2 F (1.7) Na 330±21 Tb** 0.108±0.021 Be** 0.55±0.16 Fe 14.5±2.4 Nd** 4.0±0.8 Th** (2.5) Bi** (0.76) Gd** 0.8±0.2 Ni 0.21±0.03 Ti (1.7) Br (1.8) Ge** 1.54±0.28 P* 0.113±0.008 Tl** 0.53±0.13 Ca 475±31 Hg** 5.5±1.4 Pb 0.034±0.013 Tm** 0.049±0.015 Cd** 9±1 Ho** 0.11±0.04 Pr** 1.1±0.3 U 0.016±0.004 Ce** 8.9±1.1 I (0.23) Rb 3.12±0.16 V (0.033) Cl* (0.07) K* 0.25±0.02 S* 0.077±0.010 Y 0.18±0.07 Co 0.019±0.007 La (0.011) Sb** (4.3) Yb** 0.22±0.07 Cr (0.13) Li 0.03±0.01 Sc** (5.7) Zn 10±2 Cs** 4.4±0.8 Lu** 0.04±0.01 Se 0.033±0.012 山楂粉中元素成分分析标准物质
(GBW10250)Ag** 3±1 Cu 3.6±0.3 Mg 711±32 Si 785±182 Al* 0.018±0.006 Dy** 10±2 Mn 11±2 Sm 0.013±0.006 As 0.05±0.01 Er** 4.8±0.5 Mo 0.03±0.01 Sn 0.056±0.013 B 29±4 Eu** 5±1 N* 0.45±0.05 Sr 7.1±1.1 Ba 12±2 F (1.2) Na 46±8 Tb** 1.8±0.4 Be** 6.0±1.2 Fe 211±27 Nd 0.07±0.01 Th 0.024±0.004 Bi** 4.2±1.1 Gd 0.013±0.005 Ni 1.24±0.21 Ti 8±1 Br (2.6) Ge** 5.7±1.2 P* 0.08±0.01 Tl** 3.88±0.93 Ca* 0.29±0.03 Hg** 4.7±1.2 Pb 0.57±0.14 Tm** 0.68±0.16 Cd 0.03±0.01 Ho** 1.74±0.34 Pr (0.02) U** 5.0±1.2 Ce 0.16±0.03 I (0.25) Rb 12±1 V (0.21) Cl* 0.014 K* 0.74±0.13 S* 0.068±0.011 Y 0.17±0.03 Co 0.20±0.03 La 0.10±0.02 Sb 0.021±0.009 Yb** 4.1±0.5 Cr 3.0±0.5 Li 0.19±0.05 Sc 0.03±0.01 Zn 133±11 Cs 0.08±0.02 Lu** 0.6±0.2 Se 0.03±0.01 三七粉中元素成分分析标准物质
(GBW10251)Ag** 4±1 Cu 4.5±0.9 Mg* 0.140±0.017 Si* 0.134±0.036 Al* 0.072±0.011 Dy 0.078±0.012 Mn 45±7 Sm 0.105±0.011 As 0.76±0.14 Er 0.04±0.01 Mo 0.09±0.02 Sn 0.039±0.014 B 17±2 Eu 0.024±0.007 N* 1.338±0.092 Sr 13±3 Ba 16±2 F (3) Na 70±8 Tb 0.014±0.004 Be 0.022±0.004 Fe 552±63 Nd 0.56±0.10 Th 0.113±0.029 Bi** 7±1 Gd 0.112±0.016 Ni 2.2±0.3 Ti (28) Br (2.4) Ge (0.013) P* 0.203±0.038 Tl 0.042±0.008 Ca* 0.245±0.040 Hg 0.023±0.008 Pb 0.7±0.1 Tm** 5.5±0.9 Cd 0.311±0.022 Ho 0.015±0.006 Pr 0.14±0.02 U 0.04±0.01 Ce 1.36±0.17 I (0.20) Rb 9.5±0.7 V 1.9±0.7 Cl* (0.022) K* 1.317±0.086 S* 0.10±0.01 Y 0.66±0.09 Co 0.55±0.07 La 0.7±0.1 Sb 0.11±0.05 Yb 0.034±0.009 Cr 2.12±0.34 Li 0.45±0.12 Sc 0.16±0.07 Zn 13.8±1.1 Cs 0.129±0.023 Lu** 5.3±1.0 Se 0.024±0.008 茉莉花成分分析标准物质
(GBW10234)Ag (0.011) Cu 8.0±1.1 Mg* 0.199±0.035 Si* (0.21) Al* 0.035±0.006 Dy 0.03±0.01 Mn 101±10 Sm 0.041±0.015 As 0.5±0.1 Er 0.015±0.006 Mo 0.41±0.06 Sn 0.14±0.04 B 34±3 Eu** 9.2±1.4 N* 2.86±0.21 Sr 9.7±1.1 Ba 7.8±1.3 F 6.9±1.3 Na 94±11 Tb** 5.4±1.0 Be 0.013±0.004 Fe* 0.14±0.02 Nd 0.24±0.04 Th 0.07±0.02 Bi** 8±2 Gd 0.04±0.01 Ni 1.53±0.19 Ti 25±6 Br (3.7) Ge 0.017±0.007 P* 0.33±0.04 Tl 0.16±0.04 Ca* 0.673±0.044 Hg** 9.7±1.6 Pb 1.65±0.21 Tm** 2.22±0.31 Cd 0.42±0.04 Ho** 6±1 Pr 0.062±0.008 U 0.022±0.007 Ce 0.56±0.17 I (0.37▲) Rb 33±2 V 1.22±0.14 Cl* (.07) K* 2.36±0.34 S* 0.29±0.04 Y 0.28±0.04 Co 0.32±0.06 La 0.39±0.07 Sb 0.066±0.024 Yb 0.013±0.005 Cr 2.24±0.31 Li 0.41±0.07 Sc 0.086±0.012 Zn 49±6 Cs 0.34±0.02 Lu** 1.95±0.40 Se 0.13±0.02 注：加“*”含量单位为10-2，加“**”含量单位为10-9；括号内数据为信息值，▲为中位值，其后为置信限。
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