Tea Extract Supplier: Green, Black and Oolong Tea

Qualify the supplied concentrate and the intended drink as two separate states. A green-tea study compared separately prepared concentrates after 30 days at 4°C; it did not test the same stored concentrate before and after dilution, and higher-concentration samples were not free of deposits.[7] Specify the intended dilution, tea-derived solids content and its measurement basis, water, final pH, heat treatment, packaging and observation times separately. Acceptance of the concentrate is not validation of the final formulation.

After filtration or centrifugation, ask a different question: where did the target compounds go? First identify the product stream—permeate/clarified liquid or retentate. A 2026 white-tea study collected retained particles and compared powders reconstituted separately at 1 mg/mL. Its composition table, in μg/mg powder, does not report target mass recovery from the feed.[6] That experiment cannot directly determine the nominal molecular-weight cut-off (MWCO) or operating conditions for a production membrane.

Record each stream's measured quantity alongside its composition measured by a comparable analytical method. Target mass in a liquid stream equals volume times concentration; a weighing-based route uses mass times matching wet-basis content. Do not reapply an analytical dilution factor already included in a laboratory result. For wet solids, use wet-basis composition or convert a dry-basis assay using measured dry matter—never mix the denominators.

The blank boundary and paired-state CSVs record acceptance conditions and observations; the separate stream CSV records quantities and assays for manual mass accounting. Together they support two separate decisions: does the intended dilution meet agreed appearance and composition requirements, and how much target mass reaches the designated product stream? Include feed, product, other outputs, withdrawn samples and recovered hold-up. If all inputs and designated product amounts are known and comparable, product recovery can still be reported when a non-product output is unknown; label the overall balance incomplete and do not report complete closure or a loss value. An unclosed difference is not automatic evidence of membrane adsorption or chemical degradation; it is an investigation item, not a specification-ready loss percentage.

This is an engineering recording proposal, not a completed factory trial, shelf-life validation or statement of installed equipment capability.

Three blank UTF-8 BOM CSVs for manual records; no automatic formulas or calculator. Blank means unknown, not zero.

三张UTF-8 BOM空白CSV供手工记录，不含自动公式，也不是计算器。空白表示未知，不等于零。

1. Files and linked keys / 文件与关联键

• boundary.blank.csv: one row per step boundary and analyte; uniquely identify with boundary_id. / 每个步骤边界、每个目标物一行，以boundary_id唯一标识。
• acceptance.blank.csv: separate rows for concentrate and diluted formulation, linked by pair_id and the same ingredient batch_id; repeat paired rows for later observation times. / 原液和按实际配方稀释后的样品分行，同批原料用pair_id配对；新增观察时间需新增配对记录。
• streams.blank.csv: one row per step × stream × analyte × sampling interval. Within a batch/boundary, composite key is (step_id, stream_id, analyte, interval_id); across files prefix (boundary_id, batch_id). Another analyte or interval is not a duplicate stream. Do not total the same interval twice. / 每步骤×流股×目标物×取样区间一行；批次及边界内用上述四项复合键，跨记录须加边界和批次编号。同一流股的不同目标物或区间不算重复，不重复累计同一区间。

Use exact ASCII field names and enum values in CSVs; bilingual definitions below are authoritative. Blank means unknown/not yet entered, never zero. For genuinely inapplicable fields leave blank and explain in notes or investigation_notes; do not enter text in numeric cells. Numerical zero requires evidence. / CSV使用原样ASCII字段和枚举值；中英说明如下。空白表示未知或未填，不等于零。不适用字段留空，并在备注说明；数值格不得填文字。零值也须有依据。

2. Boundary fields / 边界字段

boundary_id, batch_id, project, operator

Identify the boundary, ingredient batch, project and responsible recorder.

标明衡算边界、原料批次、项目与记录人。

tea_type, form, other_ingredients

Record tea type, concentrate/powder/formulated base and all other ingredients.

记录茶类、浓缩液/粉末/配方基底及其他配料。

step_id, process_description, boundary_scope

Name the separation step and all included equipment; do not combine consecutive steps as parallel streams.

标明分离步骤及纳入的设备；串联步骤不得当并联流股累计。

inventory_scope

Define opening and closing inventory in tanks, membrane modules and piping; quantities and assays go in stream rows.

定义罐、膜组件、管道期初与期末存量；实测量和分析结果填流股表。

interval_start, interval_end

ISO 8601 timestamps with timezone defining the accounting window.

用含时区的ISO 8601时间定义衡算区间。

designated_product_streams

Explicit stream IDs for permeate, retentate or a defined product blend, consistent with product_eligible rows.

明确产品流股编号：透过液、截留液或指定混配；与流股表产品标记一致。

analyte, method_comparability_ref

One analyte; reference evidence that assays and matrix preparation are comparable. GAE total phenols are not catechin mass.

每次单列目标物；引用方法与基质前处理可比性依据。总酚GAE不是儿茶素质量。

temperature_C, duration_min, added_water_kg

Actual process conditions and added water; water mass here is contextual, not an extra input to add to the stream total.

实际温度、时长与加水量；此处加水量只作条件记录，不再额外计入流股总量。

criteria, approver, notes

Predetermine acceptance criteria, approval responsibility and exceptions; no default industrial thresholds.

事前约定允收准则、批准人及例外；不预设通用工业阈值。

3. Paired-state fields / 双状态字段

boundary_id, batch_id, pair_id, state, sample_id, concentrate_sample_id, operator

Link to boundary and lot. state = concentrate or diluted_formulation. Identify each sample and its source concentrate aliquot; both rows share pair_id.

关联边界与批次。state取concentrate（原液）或diluted_formulation（稀释配方）。各样品单独编号，记录来源原液分样编号，两态共用pair_id。

concentrate_kg, added_water_kg, other_inputs_kg, final_mass_kg

On the diluted-formulation row record weighed ingredients and actual final mass. For multiple other inputs, provide individual masses and compositions via inputs_composition_ref.

稀释配方行记录浓缩液、加水、其他投入及最终实测质量。多个其他投入须在inputs_composition_ref引用文件中逐项给出质量和组成。

inputs_composition_ref, volume_dosing_ref

Trace each input assay and basis. If dosing by volume, reference individual volumes in L, measurement temperatures and measured densities in kg/L. Do not assume additive volumes or kg = L.

逐项追溯投入组成及口径。按体积配料时，引用各股L数、测温及实测密度kg/L。不得假定体积可直接相加或kg等于L。

tea_solids_value, tea_solids_unit, tea_solids_basis

Record tea-derived solids content, its unit and measurement/source attribution basis for each state. °Brix of a mixed formulation is not tea solids.

分别记录茶来源固形物含量、单位、测定和来源归属依据。混合配方的°Brix不等于茶固形物。

water_report_id, mixing_order, pH, heat_process, packaging

Identify water analysis, addition order, measured state-specific pH, complete time/temperature heat history and packaging.

记录水分析编号、投料顺序、各状态实测pH、完整热处理时间/温度及包装。

observation_time, observation_temperature_C

ISO timestamp with timezone and actual observation temperature; add rows for repeated observations.

含时区的观察时间及实际观察温度；重复观察另增行。

appearance_method, appearance_result, colour_method, colour_result

Record agreed appearance and colour methods and observations; results are not automatic acceptances.

记录约定的外观、颜色方法和观察结果，不自动代表合格。

turbidity_value, turbidity_unit, turbidity_method

Numeric result with instrument/method and matching unit, not an unlabelled number.

浊度数值须配套单位、仪器/方法，不填无单位的数值。

composition_method, composition_result, sample_scope

Trace analyte, value, unit, basis and qualifier via a complete lab-report reference or full result text. sample_scope = whole_sample, supernatant or separated_solid. A supernatant assay is not a whole-sample assay.

用完整实验室报告引用或完整结果文本记录目标物、数值、单位、口径及定量状态。sample_scope取whole_sample（全样）、supernatant（上清）或separated_solid（分离固体）。上清分析不得称为全样含量。

criteria_ref, appearance_decision, composition_decision, investigation_notes

Link approved criteria; each decision = pass, fail or pending, assessed separately. Record unresolved issues.

引用已批准准则；外观及组成各自填写pass、fail或pending，分开判断，记录待调查项。

For homogeneous, loss-free mixing without target reaction, expected content in mg/kg is Σ(input kg × input mg/kg) / measured final kg. This is conditional bookkeeping, not a stability prediction. The concentrate paper tested separately prepared concentrations, not post-storage dilution of one concentrate.[7]

仅在均匀混合、无损失且目标物不反应的前提下，预期mg/kg含量为Σ(投入kg×对应mg/kg)/最终实测kg。这是有条件的账面预期，不预测稳定性。原论文研究分别制备的浓缩液，不是同一已储存原液的兑水试验。[7]

4. Stream dictionary and reporting contract / 流股字典与报告口径

boundary_id, batch_id, step_id, stream_id, analyte

Required links and identity; use the composite key in §1.

必填关联及标识，复合键见§1。

role

feed, added_water, other_input, permeate, retentate, wet_cake, withdrawn_sample, flush, opening_inventory or closing_inventory. Include every boundary stream, even when its result is unknown.

分别为进料、加水、其他投入、透过液、截留液、湿渣、取样、冲洗、期初、期末存量。即使结果未知也应列出全部边界流股。

interval_id, interval_start, interval_end, sampling_mode, sample_time, sample_id

Required interval ID and start/end; sampling_mode = segment_composite, pooled_composite or inventory. sample_time is the sampling timestamp, not the accounting interval. Identify a mixed pool or representative segment sample; inventory is a snapshot at start/end.

必填区间编号及起止；sampling_mode取segment_composite（分段混合样）、pooled_composite（混匀池样）或inventory（存量快照）。单个取样时刻不能代替区间。注明混匀池或代表性分段样，存量对应期初/期末快照。

quantity_basis, volume_L, mass_kg

quantity_basis = volume or mass; enter exactly the relevant measured quantity in L or kg. Neither quantity is inferred without measured density.

quantity_basis取volume或mass，只填所选路线的实测L或kg；没有实测密度不得互换。

result_basis

stream = original/as-received material result; vial = diluted laboratory analytical bottle; solid-extract = extract from a weighed solid portion, before or after bottle-dilution correction as indicated.

stream表示原样/收到状态的结果；vial表示实验室分析瓶的稀释液结果；solid-extract表示称取固体试样所得提取液，是否已校正分析瓶稀释由下列字段说明。

concentration_mg_L, content_mg_kg, wet_dry_basis

Choose only the assay field matching the route below. wet_dry_basis = wet or dry for mg/kg; wet denotes as-received material, including liquids weighed as received. Leave blank for liquid stream/vial mg/L; for solid-extract mg/L specify the weighed portion basis as required below.

按下列路线仅填适用分析字段。mg/kg须标wet（湿基/收到状态，含称重液体）或dry（干基）；液体原样/分析瓶mg/L不填湿干基，solid-extract的mg/L则按下述规则标称样湿干基。

dry_fraction

Measured dry-matter mass fraction of matching as-received material, 0–1 inclusive, required for a dry-basis assay applied to wet mass.

对应收到状态物料的实测干物质质量分数，范围0–1；以湿质量使用干基含量时必填。

analytical_D, already_corrected

D is the cumulative conventional laboratory dilution factor, finite and ≥1. already_corrected = yes or no. D is never physical process dilution. See route rules; the flag alone cannot establish result basis.

D为实验室常规累积分析稀释倍数，有限且≥1；already_corrected取yes或no，不是工艺兑水倍数。仅凭该标记不能确定报告口径，须按路线填写。

qualifier, loq_value, loq_unit, loq_basis

qualifier = quantified, <LOQ or missing. For <LOQ leave assay value blank; enter a positive numeric loq_value, loq_unit = mg/L or mg/kg, and loq_basis = stream, vial or solid-extract matching result_basis and the same wet/dry and correction fields. Do not put “<” in a numeric cell.

qualifier取quantified、<LOQ或missing。<LOQ时分析数值留空，另填正数定量限loq_value，loq_unit取mg/L或mg/kg，loq_basis与result_basis一致，并沿用同一湿干基及稀释校正口径。数值格不填“<”。

method_id, lab_report_id

Identify validated matrix-specific method and a unique complete report; establish cross-stream comparability. Include uncertainty and method QC references when available.

引用经验证的基质适用方法和唯一完整报告，确认跨流股可比性；有不确定度及方法质控时一并引用。

extraction_volume_L, test_portion_kg, test_portion_basis, extraction_method_ref

Required for solid-extract: final combined extract volume (not simply solvent added), representative test portion mass, basis wet or dry, and validated preparation/extraction reference. Both quantities must be positive. No undocumented extraction-recovery correction.

solid-extract必填最终合并提取液体积（不是简单的加入溶剂量）、代表性称样质量、wet/dry称样基准及经验证的提取方法引用。体积及称样质量须为正；不得擅自加入提取回收率校正。

product_eligible, target_mg, notes

product_eligible = yes or no, consistent with designated product IDs; only output rows can be products. target_mg is a manually calculated point amount in mg; CSV has no formulas. Leave blank for missing or <LOQ; record interval/upper bound in notes, not a fabricated point value.

product_eligible取yes或no，与产品编号一致，只有出料可作产品。target_mg是手工计算的mg点值，CSV无自动公式。missing或<LOQ时留空，上界/区间写备注，不伪造点值。

Allowed routes / 允许路线

1. Liquid as received / 液体原样: volume + L + result_basis=stream + mg/L + already_corrected=yes; A=V×C. D is not multiplied, even if recorded for traceability. / D即使留作追溯，也不再乘。
2. Liquid analytical bottle / 液体分析瓶: volume + L + result_basis=vial + mg/L + already_corrected=no, D required; C_stream=C_vial×D, A=V×C_stream. If the lab already reports original concentration, select stream, not vial. / 若实验室已报原液浓度，应选stream而非vial。
3. Weighed material / 称重物料: mass + kg + result_basis=stream + mg/kg + already_corrected=yes. Wet basis: A=m_wet×w_wet; dry basis: A=m_wet×f_dry×w_dry. For a dry powder still use measured as-received mass and its matching fraction; do not assume f=1. / 干粉同样按收到状态质量及匹配的干物质分数填写，不默认f=1。
4. Wet-cake extraction / 湿渣提取: mass + as-received kg + result_basis=solid-extract + mg/L, extraction fields required. Let C_extract=C_reported if already_corrected=yes, otherwise C_reported×D. Then w_portion [mg/kg] = C_extract [mg/L] × extraction_volume_L / test_portion_kg. Set wet_dry_basis equal to test_portion_basis. Wet portion: A=m_wet×w_portion; dry portion: A=m_wet×f_dry×w_portion. This assumes a representative sample and validated quantitative extraction; otherwise request the lab's validated as-received mg/kg result and use route 3. Multiplying mg/L by D alone never produces mg/kg. / C_extract为提取液浓度：已校正则直接用，未校正仅乘一次D；由提取体积和称样质量换成mg/kg。称样湿干基须与wet_dry_basis一致，干样路线另需对应实测干物质分数。前提是样品有代表性且定量提取已验证；不满足时应取得实验室验证后换算的原样mg/kg结果，走路线3。mg/L只乘D绝不会变成mg/kg。

Do not add entrained-liquid analyte again if captured by a whole-wet-cake assay. Do not combine both mg/kg and extract mg/L results for the same sample. / 整体湿渣分析若已包含夹带液，不重复加入夹带液目标物；同一样品不同时累计mg/kg结果和提取液mg/L结果。

5. Amounts, completeness and interpretation / 目标物量、完整性与判读

A_available = A_opening_inventory + Σ A_inputs (mg).

Product recovery (%) = 100 × Σ A_designated_product / A_available.

Complete closure (%) = 100 × (Σ A_outputs + A_closing_inventory) / A_available.

Unaccounted difference (mg) = A_available − Σ A_outputs − A_closing_inventory.

Products are already included in outputs: never add them twice. No recirculation totals. Do not count samples already included in an output twice; flushed hold-up counted as flush is not also closing inventory. Use either a representative mixed cumulative pool or Σ(V_segment×C_segment) for nonoverlapping segments, never endpoint concentration × entire run volume.

产品已经计入outputs，不再另加。内循环不累计。已包含在出料中的取样不重复加；已冲出并计入冲洗液的残留不再算期末存量。累计量须用代表性混匀池样或不重叠分段的Σ(V分段×C分段)，不能用终点瞬时浓度乘全程产液量。

• Check each metric separately. Complete, comparable available-input and designated-product amounts permit product recovery even if a non-product stream is unknown. Label overall balance incomplete. Missing non-product output or closing inventory prevents complete closure and a complete unaccounted difference, not necessarily recovery. Unknown denominator or product means no point recovery. / 逐项判断指标完整性。 全部投入及指定产品量完整、可比时可报告产品回收率，即使非产品流股未知；但必须注明整体衡算不完整。不完整非产品出料或期末存量使完整闭合率及完整未闭合差额未知，不必然使产品回收率未知。分母或产品未知则不得报点值回收率。
• A measured-output subtotal may be reported with its scope. Only with nonnegative, comparable amounts, no duplicates, a complete positive denominator and one consistent boundary may it be called an accounted fraction/lower bound, not complete closure. / 已测出料合计可以注明范围后单列；只有量非负、口径可比、无重复、分母完整且为正、边界一致时，才可称已核算比例/下界，不称完整闭合率。
• For <LOQ, do not substitute zero. With known quantities and compatible numeric LOQ, propagate [0, LOQ) through the same positive conversion to an amount bound. If the denominator itself is bounded, propagate numerator and denominator intervals; do not use the point formula. Blank LOQ means no numerical bound. / <LOQ不填零；量已知且数值定量限口径匹配时，按同一正数转换传播[0,LOQ)到目标物量上界。分母本身为区间时须传播分子和分母区间，不用点值公式。定量限缺失则不得报数值上界。
• Input quantities, concentrations and LOQs must be finite and nonnegative (LOQ positive); dry_fraction ∈ [0,1]; D ≥1. Zero denominator is undefined. Reject duplicate composite keys, not duplicate stream_id alone. Missing density prohibits kg↔L conversion. Negative derived differences are allowed and flagged; the nonnegative rule applies to measurements, not differences. / 输入量和含量须有限、非负（LOQ为正）；干物质分数0–1，D≥1。零分母未定义。拒绝重复复合键，不仅凭stream_id判断。无密度不得换算kg与L。计算所得负差额可保留并报警；非负规则针对输入而非差额。
• Recovery or closure >100% is flagged, never clipped/normalized. Unaccounted mass is an investigation item, not proven adsorption, degradation or removal; chemical formation/conversion requires species-specific investigation. / 超100%须复核，不截断、不归一化。差额是待调查项，不证明吸附、降解或去除；存在物种转化须专门调查。
• Concentration ratio is not recovery; instantaneous membrane rejection is not cumulative product recovery. Analytical spike recovery is method QC, not process yield; do not automatically divide process results by it. Appearance and composition decisions remain separate from recovery and shelf-life validation. / 浓度比不是回收率，瞬时膜截留率不是累计产品回收率。加标回收属于方法质控，不是工艺产率，不自动用它除算生产结果。外观、组成判断须与回收率及保质期验证分开。

6. Evidence and test scope / 证据及测试边界

The concentrate paper reports dried cream sediment mass per concentrate volume (80°C drying for 48 h), not wet sediment or percent feed solids. Its volume-corrected deficit (C_original×V1 − C_clarified×V2)/V1 in mg/mL is not a recovery fraction.[7] The white-tea paper compares composition in μg/mg powder after separate reconstitution; total recovered powder and all streams are needed for recovery. Its 30/100 kDa values are nominal MWCO, not geometric pore diameters. Folin–Ciocalteu total phenols use a gallic-acid standard and are not an additive catechin mass fraction.[6]

浓缩论文报告按80°C、48h干燥法所得茶乳沉淀质量/浓缩液体积，不是湿沉淀或占进料固形物百分比。体积校正差额公式单位为mg/mL，不是回收率。[7] 白茶论文按各自重配后的粉末μg/mg比较组成，计算回收还需粉末总量及全部流股。30/100kDa是名义截留分子量，不是几何孔径。Folin–Ciocalteu总酚使用没食子酸标准，不是可直接累加的儿茶素质量分数。[6]