CN105651951A - Method for measuring cadmium content in tortoise jelly - Google Patents
Method for measuring cadmium content in tortoise jelly Download PDFInfo
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- CN105651951A CN105651951A CN201610229846.1A CN201610229846A CN105651951A CN 105651951 A CN105651951 A CN 105651951A CN 201610229846 A CN201610229846 A CN 201610229846A CN 105651951 A CN105651951 A CN 105651951A
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- guiling gao
- nitric acid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/02—Food
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
- G01N1/4044—Concentrating samples by chemical techniques; Digestion; Chemical decomposition
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
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- Biochemistry (AREA)
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
The invention provides a method for measuring the cadmium content in tortoise jelly, and aims to provide a detection method for measuring the cadmium content in the tortoise jelly, which is simple and high in precision of a detection result. The method of the technical scheme comprises the following steps: (1) preparing a standard mixed solution; (2) pre-treating a test sample; (3) dissolving the test sample; and (4) measuring the content. The method belongs to the technical field of chemical detection.
Description
Technical field
The invention discloses the assay method of a kind of cadmium content, specifically, be a kind of method measuring chromium constituent content; Belong to technical field of chemical detection.
Background technology
GUILING GAO powder is the time-honored Traditional health care food in Wuzhou, Guangxi, its warm in nature and, not cool not dry, there is clearing heat and removing internal wetness, prosperous blood granulation promoting, loosening bowel to relieve constipation, skin care such as is refreshed oneself at the effect, all-ages, thus extremely people like, and World-wide Sale. GUILING GAO powder is made with Carapax et Plastrum Testudinis, bean jelly (starch, Herba mesonae chinensis extracting solution), Radix Angelicae Sinensis, Rhizoma Smilacis Glabrae, Radix Glycyrrhizae, Flos Lonicerae and Herba Taraxaci for primary raw material, also can be equipped with the Chinese crude drugs such as Flos Chrysanthemi, Folium Eriobotryae, Fructus Momordicae and make the product that a series of taste is different with function, cater to the taste of consumer groups.
Summary of the invention
It is an object of the invention to provide a kind of detection method simple, the method for the cadmium content in the mensuration GUILING GAO that testing result degree of accuracy is high.
For solving above-mentioned technical problem, technical scheme provided by the invention is such that
A kind of measuring the method for cadmium content in GUILING GAO, its assay method comprises the steps: successively
1) preparation of mixed standard solution:
Draw each standard solution, with the nitric acid that volume fraction is 1% be configured to Cd concentration be 0.0,10.0,50.0,100.0,150.0,200.0ng/ml;
2) pretreatment of sample
GUILING GAO sample blender blends, standby;
3) the clearing up of sample:
Weigh GUILING GAO sample 5��10g in porcelain crucible, crucible is placed on electric furnace, is evaporated, carbonization, it is transferred in high temperature furnace, 550 DEG C of more than constant temperature 2h; After taking-up, cooling, add in 5ml concentrated nitric acid sample ash in crucible, crucible is placed on electric furnace, is evaporated, then proceed in 550 DEG C of high temperature furnaces, continue ashing 1��2h, be white lime shape to sample; After taking out cooling from high temperature furnace, with nitric acid dissolved samples ash, solution is moved in 50ml volumetric flask, fully mix after constant volume, be test liquid; Meanwhile, blank is done as stated above;
4) measure
Start, adjust instrument plasma flow 15.0L/min, auxiliary flow 0.2L/min, nebulizer flow 0.80L/min, radio-frequency power 1300W, sample flow 1.50L/min, observed range 15.0 axial observation plasma reads parameter temporal 5��20S, reagent blank, standard series, sample solution is introduced instrument respectively, by computer drawing standard curve, calculate regression equation, draw the concentration of sample solution.
Further, above-mentioned a kind of measuring the method for cadmium content in GUILING GAO, Cd concentration is 1000 �� g/ml.
Further, above-mentioned a kind of measuring the method for cadmium content in GUILING GAO, the concentration of described Cd standard solution is 10 �� g/ml.
Further, above-mentioned a kind of measure the method for cadmium content, step 3 in GUILING GAO) described in nitric acid volume fraction be 1%.
Compared with prior art, element Cd in GUILING GAO is measured by technical scheme provided by the invention, and its detection method is simple, and detection degree of accuracy is high, is conducive to the quality of GUILING GAO control, improves product quality.
Detailed description of the invention
Below in conjunction with detailed description of the invention; the claim of the present invention is described in further detail; but not constituting any limitation of the invention, the amendment of any limited number of time made at the claims in the present invention protection domain, still within the claims of the present invention.
Embodiment 1
1, reagent
Concentrated nitric acid; The nitric acid of 1%
Standard reserving solution: Cd (C=1000 �� g/ml)
Standard solution: Cd (C=10 �� g/ml)
2, instrument condition
3, experimental technique
(1), the preparation of mixed standard solution: draw standard solution, with the nitric acid that volume fraction is 1% be configured to Cd concentration be 0.0,10.0,50.0,100.0,150.0,200.0ng/ml;
(2), the pretreatment of sample: GUILING GAO sample blender blends, standby.
(3), the clearing up of sample: weighing GUILING GAO sample 5��10g in porcelain crucible, be placed on electric furnace by crucible, be carefully evaporated, carbonization, to not smoldering, is transferred in high temperature furnace, 550 DEG C of more than constant temperature 2h. After taking-up, cooling, add in 5ml concentrated nitric acid sample ash in crucible, crucible is placed on electric furnace, is carefully evaporated, then proceed in 550 DEG C of high temperature furnaces, continue ashing 1��2h, be white lime shape to sample. After taking out cooling from high temperature furnace, with nitric acid (volume fraction is 1%) dissolved samples ash, solution is moved in 50ml volumetric flask, fully mix after constant volume, be test liquid. Meanwhile, blank is done as stated above.
4, measure
Start, when instrument vacuum reaches requirement, adjusts instrument indices, after making the indices such as instrumental sensitivity, resolution reach requirement, edits assay method. Reagent blank, standard series, sample solution are introduced instrument respectively, by computer drawing standard curve, calculates regression equation, draw the concentration of sample solution.
In order to better illustrate advantages of the present invention, provided by the invention method several group detection data are given below:
Table one: the comparison of each sampling amount
| Sampling amount (g) | 1.0 | 5.0 | 10.0 | 15.0 | 20.0 |
| Cd(mg/kg) | 0.000 | 0.0033 | 0.0028 | 0.0020 | 0.0022 |
Note: each sampling amount is all settled to 50ml.
Table two: each element range of linearity
| Element | ��g/L |
| Cd | 0��400 |
Table three: each detection limits
| Element | ��g/L |
| Cd | 0.5 |
Table four: the recovery of standard addition of each sample
Claims (4)
1. one kind measures the method for cadmium content in GUILING GAO, it is characterised in that its assay method comprises the steps: successively
1) preparing standard solution:
Draw Cd standard solution, with the nitric acid that volume fraction is 1% be configured to Cd concentration be 0.0,10.0,50.0,100.0,150.0,200.0ng/ml;
2) pretreatment of sample
GUILING GAO sample blender blends, standby;
3) the clearing up of sample:
Weigh GUILING GAO sample 5��10g in porcelain crucible, crucible is placed on electric furnace, is evaporated, carbonization, it is transferred in high temperature furnace, 550 DEG C of more than constant temperature 2h; After taking-up, cooling, add in 5ml concentrated nitric acid sample ash in crucible, crucible is placed on electric furnace, is evaporated, then proceed in 550 DEG C of high temperature furnaces, continue ashing 1��2h, be white lime shape to sample;After taking out cooling from high temperature furnace, with nitric acid dissolved samples ash, solution is moved in 50ml volumetric flask, fully mix after constant volume, be test liquid; Meanwhile, blank is done as stated above;
4) measure
Start, adjust instrument plasma flow 15.0L/min, auxiliary flow 0.2L/min, nebulizer flow 0.80L/min, radio-frequency power 1300W, sample flow 1.50L/min, observed range 15.0 axial observation plasma reads parameter temporal 5��20S, reagent blank, standard series, sample solution is introduced instrument respectively, by computer drawing standard curve, calculate regression equation, draw the concentration of sample solution.
2. the method for a kind of rapid determination of content of cadmium element simultaneously measured in GUILING GAO according to claim 1, it is characterised in that described Cd standard reserving solution concentration is 1000 �� g/ml.
3. according to claim 1 a kind of measure the method for cadmium content in GUILING GAO, it is characterised in that the concentration of described Cd standard solution is 10 �� g/ml.
4. according to claim 1 a kind of measure the method for cadmium content in GUILING GAO, it is characterised in that step 3) described in nitric acid volume fraction be 1%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610229846.1A CN105651951A (en) | 2016-04-14 | 2016-04-14 | Method for measuring cadmium content in tortoise jelly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610229846.1A CN105651951A (en) | 2016-04-14 | 2016-04-14 | Method for measuring cadmium content in tortoise jelly |
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| Publication Number | Publication Date |
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| CN105651951A true CN105651951A (en) | 2016-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610229846.1A Pending CN105651951A (en) | 2016-04-14 | 2016-04-14 | Method for measuring cadmium content in tortoise jelly |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698293A (en) * | 2013-12-30 | 2014-04-02 | 武汉新华扬生物股份有限公司 | Method for detecting cadmium of enzyme preparation |
| CN103940897A (en) * | 2014-05-13 | 2014-07-23 | 广州金域医学检验中心有限公司 | Method for determining traces of mercury, cadmium, lead and arsenic in food by inductively coupled plasma mass spectrometry (ICP-MS) |
-
2016
- 2016-04-14 CN CN201610229846.1A patent/CN105651951A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698293A (en) * | 2013-12-30 | 2014-04-02 | 武汉新华扬生物股份有限公司 | Method for detecting cadmium of enzyme preparation |
| CN103940897A (en) * | 2014-05-13 | 2014-07-23 | 广州金域医学检验中心有限公司 | Method for determining traces of mercury, cadmium, lead and arsenic in food by inductively coupled plasma mass spectrometry (ICP-MS) |
Non-Patent Citations (4)
| Title |
|---|
| 刘素华等: "电感耦合等离子体原子发射光谱法测定食品中铅、镉、铬、镍的方法研究", 《预防医学论坛》 * |
| 王金玲等: "桂枝茯苓胶囊及药材中多元素ICP － MS 测定方法的建立", 《中国中药杂志》 * |
| 舒亚海等: "ＩＣＰ－ＭＳ法测定金银花花蕾中２７种金属元素含量", 《国际沙棘研究与开发》 * |
| 蒋宏霖等: "电感耦合等离子体质谱法测定金银花中重金属的含量", 《安徽农业科学》 * |
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Application publication date: 20160608 |