盐酸萘替芬，分析标准品,98.0%(T)

• [IF=14.0000] Ke Xu, Yunyi Wang, Xiao Gao, Zhaolan Wei, Qi Han, Shuxin Wang, Wanting Du, Jian Wan, Cuihong Wan, Mingqing Chen et al. "Polystyrene microplastics and di-2-ethylhexyl phthalate co-exposure: Implications for female reproductive health" - 2024-08-03
• [IF=11.8000] Sinuo Tian, Wei Sun, Xiaoxuan Sun, Yifan Yue, Ming Jia, Shiran Huang, Zhiqiang Zhou, Li Li, Jinling Diao, Sen Yan, Wentao Zhu et al. "Intergenerational reproductive toxicity of parental exposure to prothioconazole and its metabolite on offspring and epigenetic regulation associated with DNA methylation in zebrafish" - 2023-02-15
• [IF=11.4000] Jin-Ge Zhang, Wenjun Shi, Dong-Dong Ma, Zhi-Jie Lu, Si-Ying Li, Xiao-Bing Long, Guang-Guo Ying et al. "Chronic Paternal/Maternal Exposure to Environmental Concentrations of Imidacloprid and Thiamethoxam Causes Intergenerational Toxicity in Zebrafish Offspring" - 2023-08-31
• [IF=9.8000] Xianglin Chen, Shangyue Yang, Biran Zhu, Mengyuan Zhang, Na Zheng, Jianghuan Hua, Ruiwen Li, Jian Han, Lihua Yang, Bingsheng Zhou et al. "Effects of environmentally relevant concentrations of niclosamide on lipid metabolism and steroid hormone synthesis in adult female zebrafish" - 2023-11-20
• [IF=9.8000] Qiaoqiao Wang, Jian Tang, Luqing Pan, Aimin Song, Jingjing Miao, Xin Zheng, Zeyuan Li et al. "Study on epigenotoxicity, sex hormone synthesis, and DNA damage of benzo[a]pyrene in the testis of male Ruditapes philippinarum" - 2023-12-16
• [IF=8.9430] Zhongdian Dong, Xueyou Li, Yuebi Chen, Ning Zhang, Zhongduo Wang, Yan-Qiu Liang, Yusong Guo et al. "Short-term exposure to norethisterone affected swimming behavior and antioxidant enzyme activity of medaka larvae, and led to masculinization in the adult population" - 2022-10-14
• [IF=8.8000] Jiming Ruan, Gen Wan, Zhen Lin, Jianzhen Huang, Xiaochen Tang, Huazhong Liu et al. "Disruption of sex steroid hormones biosynthesis by short-term enrofloxacin antibiotic exposure in Carassius auratus var. Pengze" - 2023-09-26
• [IF=8.8000] Wenlong Huang, Xiaoling Shi, Qiong Zhang, Yuequn Chen, Shukai Zheng, Wenying Wu, Congying Luo, Kusheng Wu et al. "Transgenerational effects of BDE-47 to zebrafish based on histomorphometry and toxicogenomic analyses" - 2023-10-13
• [IF=8.2000] Jieyu Ding, Hongkai Wang, Jiabo He, Chen Jing, Haocheng Zhao, Fengxiao Hu et al. "Elucidating the reproductive toxicity mechanisms in female zebrafish: A transcriptomic study of lifetime tris(2-chloroethyl) phosphate exposure" - 2024-07-15
• [IF=8.2000] Jiayuan Qu, Liling Wu, Li Mou, Changjiang Liu et al. "Polystyrene microplastics trigger testosterone decline via GPX1" - 2024-07-06
• [IF=7.9630] Zhangshan Gao et al. "Testicular toxicity of bisphenol compounds: Homeostasis disruption of cholesterol/testosterone via PPARα activation" - 2022-05-01
• [IF=7.1290] Lirui Hou, Yuhan Fu, Chong Zhao, Lihong Fan, Hongbo Hu, Shutao Yin et al. "Ciprofloxacin and enrofloxacin can cause reproductive toxicity via endocrine signaling pathways" - 2022-09-02
• [IF=7.1290] Xiaoling Shi, Ruotong Wu, Xin Wang, Wenlong Huang, Shukai Zheng, Qiong Zhang, Jiajun Peng, Wei Tan, Kusheng Wu et al. "Effects of 2,2′,4,4′-tetrabromodiphenyl ether (BDE-47) on reproductive and endocrine function in female zebrafish (Danio rerio)" - 2022-11-23
• [IF=6.8000] Qianhui Zhao, Ying Liu, Xiao Wang, Yixuan Zhu, Yulan Jiao, Yongzhan Bao, Wanyu Shi et al. "Cuscuta chinensis flavonoids reducing oxidative stress of the improve sperm damage in bisphenol A exposed mice offspring" - 2023-03-24
• [IF=6.2910] Lu-xi Lin et al. "Aflatoxin B1 causes oxidative stress and apoptosis in sheep testes associated with disrupting rumen microbiota" - 2022-02-03
• [IF=5.8110] Xinyue Chang et al. "The Protective Effect of Trichilia catigua A. Juss. on DEHP-Induced Reproductive System Damage in Male Mice" - 2022-02-03
• [IF=5.8000] Ye Zhao, Xueyong Yin, Yang Yu, Shihao Huang, Hao Feng, Shuang Wang, Yiming Cai, Ruofan Zhao, Shuai Gao, Ye Liu, Zhengxin Zhang, Xinyu Zhao, Ruonan Qiao, Jialin Yuan, Weichen Guan, Huiping Yang, Yun Shi, Haishui Shi et al. "Social rank-dependent effects of testosterone on huddling strategies in mice" - 2023-03-29
• [IF=5.7140] Luyao Zhang et al. "Effects of L-Glufosinate-ammonium and temperature on reproduction controlled by neuroendocrine system in lizard (Eremias argus)" - 2019-11-06
• [IF=5.5890] Xianling Yuan et al. "Imidacloprid disrupts the endocrine system by interacting with androgen receptor in male mice" - 2019-11-20
• [IF=5.4000] Hangsha Wu, Yue Lv, Mingfang Zhao, Rui Tang, Yafei Li, Keer Fang, Feiyang Wei, Weihong Ge, Weifeng Du, Changyu Li, Yefeng Zhang et al. "Study on the substance basis of the efficacy of eucommiae cortex before and after salt processing for the treatment of kidney-yang deficiency syndrome based on the spectrum-effect relationship" - 2023-07-20

• 总多糖含量标准品
• D-葡萄糖一水物，分析标准品, HPLC≥98%
• 萘啶酮酸，分析标准品,HPLC≥98%
• 吲哚美辛，分析标准品,HPLC≥99%
• 盐酸赛洛唑啉，分析标准品,HPLC≥99%
• 8Z,11Z,14Z-Eicosatrienoic Acid，分析标准品,GC≥98%
• 别异欧前胡素，分析标准品,HPLC≥98%
• Glucoliquiritin，分析标准品,HPLC≥98%
• Suchilactone，分析标准品,HPLC≥98%
• 6-Hydroxywogonin，分析标准品,HPLC≥98%
• Isonemerosin，分析标准品,HPLC≥98%
• 8,8''-黄芩素，分析标准品,HPLC≥98%
• Apterin，分析标准品,HPLC≥98%
• 紫花前胡苷I，分析标准品,HPLC≥98%
• Pd-C-II，分析标准品,HPLC≥98%
• 紫花前胡素D，分析标准品,HPLC≥98%
• 山芹醇，分析标准品,HPLC≥98%
• 球腺糖苷A，分析标准品,HPLC≥98%
• Tianeptine，分析标准品,HPLC≥99%
• 尼可地尔，分析标准品,HPLC≥99%
• 苏丹橙G，分析标准品,HPLC≥96%
• 利拉萘酯，分析标准品,HPLC≥98%
• 乙酸丁香酚酯，分析标准品,HPLC≥98%
• 二氯喹啉酸，分析标准品,HPLC≥98%
• 潘生丁，分析标准品,HPLC≥99%
• 丹参酸甲酯，分析标准品,HPLC≥95%
• 盐酸洛贝林，分析标准品,HPLC≥98%
• 克拉霉素，分析标准品,HPLC≥98%
• 亚油酸乙酯，分析标准品,GC≥98%
• 二硫代苏糖醇，分析标准品,HPLC≥98%
• 雷贝拉唑钠，分析标准品,HPLC≥98%
• D-海藻糖（二水），分析标准品,HPLC≥98%
• D-(+)-松三糖 一水合物，分析标准品,HPLC≥98%
• 乙二醇，分析标准品,100mg
• 4-甲氧基苯甲酸，分析标准品,HPLC≥99%
• 羟钴胺盐酸盐，分析标准品,分析标准品，95%
• 反式-乌头酸，分析标准品,HPLC≥98%
• 棕榈油酸，分析标准品,GC≥99%
• 苯溴马隆，分析标准品,HPLC≥98%
• 1-辛醇，分析标准品,GC≥98%
• 拉米呋啶，分析标准品,HPLC≥98%
• 16,17-环氧黄体酮，分析标准品,HPLC≥98%
• (+)-δ-生育酚，分析标准品,HPLC≥90%
• 二十二碳五烯酸甲酯，分析标准品,
• 邻苯二甲酸二己酯，分析标准品,GC≥98%
• 来曲唑，分析标准品,HPLC≥99%
• 2，2-二(4-羟基苯)丙烷，分析标准品,HPLC≥99%
• 1，3-二(4-硝基苯)脲/4，4‘-二硝基二苯脲-D8 标准品，分析标准品,HPLC≥98%
• 多拉菌素，分析标准品,HPLC≥98%
• 普伐他汀，分析标准品,HPLC≥98%
• 奥利司他，分析标准品,HPLC≥98%
• 克拉维醇，分析标准品,HPLC≥96%
• 6-羟基-2,5,7,8-四甲基苯并二氢吡喃-2-羧酸，分析标准品,HPLC≥98%
• 虫酰肼，分析标准品,HPLC≥98%
• 山嵛酸甲酯，分析标准品,GC≥99%
• 孕三烯酮，分析标准品,HPLC≥98%
• D-山梨糖，分析标准品,GC≥98%
• 异佛尔酮，分析标准品,GC≥97%
• 甘宝素，分析标准品,HPLC≥98%
• 1,4-二羟基蒽醌，分析标准品,HPLC≥96%

酶联生物经过不断的实验优化和改进，积累了大量的经验，拥有专业的酶联研发团队。利用专业的酶联免疫技术自主研发的elisa试剂盒，能对血清及其它样本定量检测抗原，定性检测特异性抗体。优质的试剂，先进的仪器和正确的操作是保证ELISA检测结果准确可靠的必要条件。ELISA检测的方便性、稳定性、重复性和可靠性方面都具有很大的优势。

ELISA检测技术服务内容：
1、双抗体夹心法检测抗原 2、间接法检测抗体 3、为客户提供各种ELISA技术进行样本检测。

以上代测费，凡购买本公司试剂盒，我们免费代测！
凡购买本公司目录任何一种酶联免疫检测试剂盒，您只需将需要检测的动物（Human, Rat, Mouse, Rabbit, Monkey, Pig……）种类和检测指标（白介素类、激素类）及标本数量（48T/96T）通知公司业务员即可。在接到客户标本当日起，现货产品一周内将检测报告交到客户手中！
欢迎各科研单位在各种项目上与我们公司开展不同层次的密切合作，以双赢求发展，共同进步，为中国检测事业的发展积累经验。

二、样本要求
在收集标本前都必须有一个完整的计划，必须清楚要检测的成份是否足够稳定。我们提倡新鲜标本尽早检测，对收集后当天就进行检测的标本，及时储存在4℃备用，如有特殊原因需要周期收集标本，请造模取材后，将标本及时分装后放在-20℃或-70℃条件下保存。因冰室与室温存在一定温差，蛋白极易降解，直接影响实验质量，所以避免反复冻融。代测放免标本的客户取材前须向我司销售人员索要说明书，具体操作注意事项请与我司技术人员沟通。

液体类标本：标本必须为液体，不含沉淀。包括血清、血浆、尿液、胸腹水、脑脊液、细胞培养上清、组织匀浆等。

血清：室温血液自然凝固10-20分钟后，离心20分钟左右（2000-3000转/分）。收集上清。如有沉淀形成，应再次离心。

血浆：应根据试剂盒的要求选择EDTA、柠檬酸钠或肝素作为抗凝剂，加入10%（v/v）抗凝剂(0.1M柠檬酸钠或1%heparin 或2.0%EDTA.Na2)混合10-20分钟后，离心20分钟左右（2000-3000转/分）。仔细收集上清。如有沉淀形成，应再次离心。

尿液、胸腹水、脑脊液：用无菌管收集。离心20分钟左右（2000-3000转/分）。仔细收集上清。如有沉淀形成，应再次离心。

细胞培养上清：检测分泌性的成份时，用无菌管收集。离心20分钟左右（2000-3000转/分）。仔细收集上清。检测细胞内的成份时，用PBS（PH7.0-7.4）稀释细胞悬液，细胞浓度达到100万/ml左右。通过反复冻融，以使细胞破坏并放出细胞内成份。离心20分钟左右（2000-3000转/分）。仔细收集上清。保存过程中如有沉淀形成，应再次离心。

组织标本：切割标本后，称取重量。加入一定量的PBS，缓冲液中可加入1μg/L蛋白酶抑制剂或50U/ml的Aprotinin（抑肽酶）。用手工或匀浆器将标本匀浆充分。离心20分钟左右（2000-3000转/分）。仔细收集上清置于-20度或-70度保存，如有必要，可以将样品浓缩干燥。分装后一份待检测，其余冷冻备用。

三、寄标本时需注明以下情况：
1、标本编号；2、所测项目；3、是否做复孔；3、联系方式；4、实验后标本是否寄回。

客户须知：
客户应对所提供的材料及信息负责，如因客户提供的材料及信息不准确而引起的实验延误或经济损失由客户承担。

Q:1. how to collect samples and preparation of ELISA?
Performed by ELISA test is generally common clinical samples including blood (finger blood, blood), urine, feces, cerebrospinal fluid, pleural effusion, prostatic fluid, semen, vaginal secretions, which
Some time of sample collection, preservation methods and has certain requirements.
Collection (a) clinical specimens
A, blood samples:Some physiological factors, such as smoking, eating, exercise, mood swings, pregnancy, postural changes in blood can affect certain ingredients, even some of diurnal variation. Therefore, blood samples
Acquisition should avoid interference physiological factors, consistent with appropriate conditions, such as can not be avoided, should indicate the factors on the specimen.
1. Peripheral:Usually select the inside of blood left ring finger, the portion should be no frostbite, inflammation, edema, damage. If the site does not meet the requirements to other parts of the fingers instead. For burn patients, optional leather
Intact skin at the blood. As part of routine blood tests (eg, white blood cell count, sort, etc.) affected by physiological factors fluctuation is too large, when compared to the conditional should be consistent. It relates to the body, blood clotting function
Can test items (such as platelet count, bleeding time or clotting time) testing, we must pay attention to understand whether the patient used anticoagulant, procoagulant drugs in order to reduce or avoid interfering factors
influences.
2. Blood:In addition to involving a variety of projects such as hemostasis and thrombosis detector requires the use of anticoagulated blood plasma, the current analysis to detect the vast majority of projects can be directly detected using blood serum. In the serum test items
, Some (such as blood sugar, blood fat) diet and circadian factors influenced, fasting blood samples were generally appropriate; some decay rapidly in the blood (serum enzyme activity assay such as ACP activity, etc.),
0 ~ 4 ℃ storage is not an activity decreased, the detection of these projects must be timely and fast; some (such as creatine kinase) influenced by exercise and other factors. Avoid hemolysis occurs when blood is also important
And, more particularly potassium, LDH and other measurement.
B, urine samples:With the same blood samples, urine samples affect diet, exercise, medication and other factors that are also large, especially on the diet, so the morning urine generally superior to random urine. Means getting up early morning urine
After the first urine specimens, representing concentrated and acidified visible components (such as blood cells, epithelial cells, tubular) easy to observe the relative concentration. Random urine that is a random urine specimens convenient, but by diet,
Sports, and even more the influence of drugs, prone to false positive and false negative results, such as diet proteinuria, glucosuria diet, vitamin C interference occult blood results and the like. Postprandial urine (patient 2 hours after lunch, collected
Human Urine) suitable for urine, urine protein and urobilinogen check urine samples at this time to increase the sensitivity of the test, the detection of minor lesions. 12 hours in urine cell count is Addis count (last night 8:00
After emptying the bladder to all specimens of urine 8 o'clock the next morning), because a long time, easy to breed bacteria shall be added preservative formaldehyde. 24-hour urine (the first day of the morning after emptying the bladder specimens from 8:00 to 8:00 the next morning
All urine) quantification of chemical substances, including proteins, sugars, urinary 17-one, 17-hydroxy steroids, catecholamines, Ca2 +, etc., to detect different substances, choose a different preservative preservative. clean
Urine used for urine bacterial culture requires sterile specimens were taken after washing the vulva. Urine specimens should be enough to collect all, at least 12 ml, preferably 50 ml, the timing must collect all the urine of women
Patients should avoid vaginal secretions, blood contamination of urine specimens.
C, stool samples:Stool samples for the detection judgment digestive diseases has important reference value. Collection requirements with a clean bamboo select faecal mucus, pus and blood components and other abnormality, no abnormal appearance
Droppings shall be drawn from multiple surface and deep manure end. Get parasitemia and for egg counts should be collected 24 hours feces. Dysentery amoeba trophozoites check should immediately check in after a bowel movement, and from there sepsis
Softer at the drawn, insulation inspection. Charles S. japonicum eggs should take mucus, pus and blood portion 30g stool specimens from at least miracidia hatching, and to be treated as soon as possible. Check pinworm eggs must use transparent film swab
Night before 12:00 or early in the morning from defecation wrinkled folds around the anus and immediately swabbing at microscopic examination. Occult blood test (chemistry), fasting before the test on the 3rd of meat and foods containing animal blood and ban clothing iron, vitamin C and so on.
Should be checked in all 1 hour stool specimen collection is completed, in order to prevent damage to physical components of digestive enzymes and pH by. For clinical samples above the detection indicators.
D, CSF samples:CSF samples collected immediately after submission, place too long will affect the test results: such as cell degeneration, destruction, leading to counting and classification are not allowed; some chemicals such as glucose content will decompose Save
Less; bacteria occur autolysis affect bacteria detection rate. Cerebrospinal fluid extracted three general dispensing a sterile tube, the first tube for bacterial culture, a second tube for chemical analysis and immunological tests, the third tube for general
Characters and microscopic examination, three of the order should be reversed. Specimen collection is difficult because all inspection and testing process should pay attention to safety.
E, ascites and pleural effusion samples:CSF samples with the same attention to safety after the specimen collection, and timely submission. Generally separated into three tubes, one for routine cytology, a biochemical examination, a bacterial culture, in order
CSF same is appropriate.
F, prostatic fluid sample:Prostatic fluid specimen after prostate massage by the acquisition, directly drop when less liquid on a glass slide and timely submission shall be taken to prevent sample evaporation to dryness, the amount collected for a long time in a clean, dry test tube. If massage
No prostatic fluid, urine sediment can be checked after the massage.
G, semen samples:Abstinence before semen collection should be 3 to 7 days, drain the urine after masturbation or other available methods of semen directly into clean containers, insulation and timely submission. Due to changes in sperm production during the day and
Large, generally should be checked 2 to 3 times (each time interval of 1 to 2 weeks) in order to make a diagnosis.
H, samples of vaginal secretions:Vaginal samples were collected 24 hours before intercourse should be prohibited, bath, vaginal examination, vaginal lavage and local on the drug, etc., drawing instruments used need to be cleaned. Usually with brine-soaked cotton swab from the vagina deep
Or rear vaginal fornix, cervical canal mouth drawn, etc., made after saline smear vaginal secretion samples observation, women with menstrual vaginal secretions were not checking.
2, do before each sample by ELISA experiment how to prepare?
Before collecting the sample must have a comprehensive plan must clearly be detected component is stable enough. To be collected on the same day Sample testing, and timely backup stored at 4 ℃. For the next day re-testing samples frozen in a timely manner after dispensing -20 ℃ spare, conditional, preferably -70 ℃ cryopreservation standby. Avoid repeated freezing and thawing specimens
. Liquid samples: including serum, plasma, urine, pleural effusion, cerebrospinal fluid, cell culture supernatant and the like.
1. serum:
Coagulation at room temperature 10-20 mins, centrifugation 20 minutes or so (2000-3000 rev / min). Carefully collect the supernatant. If precipitation during storage, Centrifugal again.
2. Plasma:
EDTA should be selected according to the requirements of the specimen, sodium citrate or heparin as an anticoagulant, mix 10-20 mins, centrifugation 20 minutes or so (2000-3000 rev / min). Carefully collect the supernatant. Save process
If precipitation appeared, Centrifugal again.
3. Urine:
Sterile collection tube. Centrifuged for 20 minutes or so (2000-3000 rev / min). Carefully collect the supernatant. If precipitation during storage, Centrifugal again. Pleural and peritoneal effusions, and cerebrospinal fluid Reference to this practice. 4. The cell culture supernatant:
The detection of secretory component with a sterile collection tube. Centrifuged for 20 minutes or so (2000-3000 rev / min). Carefully collect the supernatant.
5. cultured cells
????When the detection of intracellular components, diluted with PBS (PH7.2-7.4) cell suspension, the cell concentration reached 1 million / ml or so. By repeated freezing and thawing or tissue protein extraction reagent was added to the cells
Damage and release of intracellular components. Centrifuged for 20 minutes or so (2000-3000 rev / min). Carefully collect the supernatant. If precipitation during storage, Centrifugal again.
6. tissues
????After cutting samples, check the weight. Adding a certain amount of PBS, PH7.4. Rapidly frozen with liquid nitrogen. After thawing samples remained at 2-8 ℃. Adding a certain amount of PBS
(PH7.4), or tissue protein extraction reagent, or by hand homogenizer homogenized sample. Centrifuged for 20 minutes or so (2000-3000 rev / min). Carefully collect the supernatant. A new package to be detected, which
I alternate freezing.
Q:Do I have to run all of my standards and samples in duplicate?
A:Yes, the duplicates are run in order to monitor assay precision and increase confidence in the assay results obtained.
Q:Do I have to run all of my samples at one time?
A:No, each kit uses stripwell microplate. This allows the user to analyse different numbers of samples at different times.
Q:What types of reproducible results are obtained with the assays?
A:Each kit comes with a manual containing a graph of typical data obtained. Any variation in operator, pipetting and washing technique, incubation time or temperature, and kit age can cause variation in result. Each user should obtain their own standard curve.
Q:Is it possible to store the reagents other than indicated?
A:Storage of the kit components under conditions other than indicated is not recommended in order to assure proper performance of the test.
Q:How should I store my samples?
A:Samples should be stored at -20oC or lower temperature. For long-term storage, it is recommended to freeze them at -70oC -80oC.
Q:Can I modify the protocol?
A:BG ELISA kits have been optimized to provide the best possible results. Modifying the format or protocol may give inaccurate and wrong results.
Q:Can I use a sample type that is not recommended in the kit insert?
A:The kit has been validated for the sample types listed in the kit insert. Sample types other than those validated have not been tested. Contact Technical Service for further information.
Q:My samples generated values that were outside the dynamic range of the assay. Can I use these values?
A:It is recommended that only sample values that fall within the range of the standard curve be used. Values outside the range of the standard curve are generally non-linear, which can lead to incorrectly extrapolated values. Samples that generate values higher than the highest standard should be (further) diluted and the assay repeated. If samples fall below the range of the assay, the sample is considered to be non-detectable.
Q:Do I have to run a Blank or Zero Standards every time?
A:Yes, these are required for the calculations, and reflect any subtle but significant performance changes from day to day and assay to assay. They are also extremely helpful when troubleshooting the source of a particular assay problem.
Q:Can I alter the volume of sample I use in the assay?
A:It is not recommended that you alter the volumes since all BG kits are designed for optimal performance at the given volumes
Q:Can components from different kits be used?
A:Each kit contains components which have specific lot numbers to ensure that all of the components are performing optimally alone, as well as with all of the other components in the kit. QC testing is performed on these specific lots. It is never recommended to use your own components or components from other kits or vendors.
Q:My standard curve looked fine, but I didn’t get a signal in my sample when I expected to, why?
A:The sample may not contain the analyte. A matrix effect may be masking the detection. Ensure that the recommended dilution was followed as stated in the kit insert. If dilution was recommended, check to be sure that the dilution was performed properly. Over-dilution may cause the sample to fall below the range of the standard curve.
Q:How do you recommend I wash my plate?
A:If you are using an automated plate washer we recommend that the calibration be checked on a regular basis, and that the system is flushed with the Plate Washing Buffer prior to washing. The same is true for a manual washer. A repeater or a wash bottle can also be used. The user should be careful to ensure that all of the contents are aspirated and the plate tapped dry on lint-free paper.
Q:Do I need to use a plate shaker?
A:Reliable results can be obtained without a plate shaker, but the O.D.'s will generally be lower than those obtained using a plate shaker.
Q:Why do I have to use wavelength correction between 450-570nm?
A:For the ELISA assay, reading at dual wavelengths is done to correct for the optical density contributed by the plastic well, the lamp and optical fluctuations.
Q:If I extract my sample, do I still need to follow the recommended dilutions given in the kit insert?
A:The amount of sample dilution needed after an extraction procedure will be affected by the effects of purification and concentration in the protocol used. The amount of dilution or concentration will have to be determined by the end-user.
Q:What is the expected concentration of analyte that I should expect to find?
A:The amount of a given analyte may vary not only from species-to-species, but also between tissue and cellular sources. The best source of this information is the current literature that is easily accessed through the Internet at multiple scientific databases.
Q:My optical densities were a little higher (or lower) than those in the manual that came with my kit. Why?
A:The optical density is affected by a number of physical conditions such as time and temperature. We suggest that you shorten or lengthen the final incubation with substrate solution to compensate.
Q:What are the reasons for High Background?
A:1) Improper Washing: Check volume of washing buffer reservoir and make sure all recommended washing steps are performed. 2) Contaminated Substrate: Make sure there is no contamination of the substrate with metal ions or oxidizing reagents, before use. Keep the extra substrate solution separately during the ELISA substrate development time. 3) Substrate exposed to light: Exposure to light may result in a blue color of the substrate. Keep solutions in the dark (vial) until ready to dispense into the plate. 4) Wrong Incubation Times/Temperatures: Generally follow the test protocol regarding incubation times and temperatures. However, if all wells are intensely and equally colored with no intensity gradient observed in the standard dilution series, then it may be necessary to observe the substrate reaction as the color is developing, in order to stop the reaction sooner.